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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Marine Engineering
Journal Basic Information
Journal DOI :
Korean Society of Marine Engineers
Editor in Chief :
Volume & Issues
Volume 34, Issue 8 - Nov 2010
Volume 34, Issue 7 - Nov 2010
Volume 34, Issue 6 - Sep 2010
Volume 34, Issue 5 - Jul 2010
Volume 34, Issue 4 - May 2010
Volume 34, Issue 3 - May 2010
Volume 34, Issue 2 - Mar 2010
Volume 34, Issue 1 - Jan 2010
Selecting the target year
Experimental Study on Compact type CO
Gas Cooler(1) - Heat Flowrate and Pressure Drop in a Multi-Tube-In-Tube Helical Coil Type Gas Cooler -
Oh, Hoo-Kyu ; Son, Chang-Hyo ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 30~36
DOI : 10.5916/jkosme.2010.34.1.030
The heat flowrate and pressure drop of
in a multi-tube-in-tube helical coil type gas cooler were investigated experimentally. The mass flowrate of
and coolant were varied from 0.06 to 0.075 [kg/s], respectively and the cooling pressure of gas cooler were from 8 to 10 [MPa]. The heat flowrate of
in the test section is increased with the increase in mass flowrate of coolant, the cooling pressure and mass flowrate of
. The pressure drop of
is decreased with the decrease in mass flowrate of coolant and
, but decreased with increase in cooling pressure of
. The heat flowrate of
in the multi-tube-in-tube helical coil type gas cooler is greatly higher than that of
in the double pipe type gas cooler, while the pressure drop of
in the multi-tube-in-tube helical coil type gas cooler is greatly lower than that of
in the double pipe type gas cooler. Therefore, in case of the application of
at the multi-tube-in-tube helical coil type gas cooler, it is expected to carry out the high-efficiency, high-performance and compactness of gas cooler.
A Numerical Study on Effects of Pilot Injection on Combustion and Emission Characteristics in a Marine Diesel Engine
Bae, Myung-Jik ; Han, Dong-Sik ; Kim, Hyeon-Gyu ; Chang, Young-Jone ; Song, Ju-Hun ; Jeon, Chung-Hwan ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 37~45
DOI : 10.5916/jkosme.2010.34.1.037
Computational simulation has been carried out to examine the effects of pilot injection to reduce both of NOx and Soot emissions in a marine diesel engine. For verification of the computational result, calculated cylinder pressure was matched to experimental pressure. In this study, the primary variables were injection timing, dwell time and injection rate while the amount of injection fuel was maintained constant. It was revealed that variation of pilot injection timing affects auto ignition and heat release rate. In the results, both of NO and soot emission were reduced without deterioration of in-cylinder pressure under the condition of
CA dwell time and 0.022kg/s injection rate.
Effect of Two staged Inter-cooler on Efficiency of LNG Liquefaction Process
Yoo, Sun-Il ; Oh, Seung-Taek ; Lee, Ho-Saeng ; Yoon, Jung-In ; Choi, Keun-Hyung ; Lee, Sang-Gyu ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 46~52
DOI : 10.5916/jkosme.2010.34.1.046
In this study, several types of natural gas liquefaction processes using two staged Inter-cooler are simulated and designed to secure a competitiveness in the industry of natural gas liquefaction plant. These processes are based on basic cascade process, and all of these are improved with two staged compressors type. One of types is applied Inter-cooler to each cycle such as propane, ethylene, methane, the other type is applied Inter-cooler to whole cycle. These processes are compared characteristics of performance with basic process. Cascade process with two staged Inter-cooler in the whole cycle is on the top ranked with increment ratio of COP about 13.7 ~ 20.5%, and yield efficiency of this process are improved comparing with the basic process by 23.8% ~ 35% lower specific power, respectively.
Numerical Study Of H
O-Cu Nanofluid Using Lattice-Boltzmann Method
Taher, M.A. ; Li, Kui-Ming ; Lee, Yeon-Won ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 53~61
DOI : 10.5916/jkosme.2010.34.1.053
In the present study, a laminar natural convection flow of
-Cu nanofluid in a two dimensional enclosure has been investigated using a thermal lattice Boltzmann approach with the Bhatnagar-Gross-Krook (BGK) model. The effect of suspended nanoparticles on the fluid flow and heat transfer process have been studied for different controlling parameters such as particle volume fraction (
), Rayleigh number (Ra). For this investigation the Rayleigh number changes from 104 to 106 and volume fraction varied from 0 to 10% with three different particle diameters (dp), say 10 nm, 20 nm and 40 nm. It is shown that increasing the Rayleigh number (Ra) and the volume fraction of nanofluid causes an increase of the effective heat transfer rate in terms of average Nusselt number (Nu) as well as the thermal conductivity of nanofluid. On the other hand, increasing the particle diameter causes the decrease of the heat transfer rate and thermal conductivity. The result of the analysis are compared with experimental and numerical data both for pure and nanofluids and it is seen a relatively good agreement.
Development of Simulation Program of Two-Stroke Marine Diesel Engines
Choi, Jae-Sung ; Jeong, Chan-Ho ; Cho, Kwon-Hae ; Lee, Jin-Uk ; Ha, Tae-Bum ; Kim, Houng-Soo ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 62~68
DOI : 10.5916/jkosme.2010.34.1.062
The requirement of high efficiency and low emission for marine diesel engines are being enforced because of air pollution and climate change on the earth. In connection with these, many new technologies are considered. But they are mainly for new building ship. It is necessary to be concerned about the improvement of engine performance for existing ship. In this paper, the simulation program for performance of marine two-stroke diesel engine was developed to predict the deteriorating performance according to elapsed time for existing ship. The result was compared with the result of the program named TOP-CODE which was used by engine maker and checked to be shown good agreement between them.
Vibration Characteristics of a Model Ship with Weis-Fogh type Ship's Propulsion Mechanism
Ro, Ki-Deok ; Choi, Byeong-Kuen ; Lee, Jeong-Hwan ; Oh, Se-Kyung ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 69~75
DOI : 10.5916/jkosme.2010.34.1.069
A model ship equipped with the Weis-Fogh type ship's propulsion mechanism, which is consisted of one wing in a squared channel, was constructed. Sailing and vibration tests of the model ship were performed with the opening angles in a pool. The results are summarized as follows. The thrust and the speed of model ship were the highest for the spring-type wing of which the opening angle is automatically controlled in one stroke. Moreover, these values were approximately reduced by 4% from
opening angle to
in order. The maximum amplitude and RMS values of the model ship were the lowest for the wing having the opening angle of
, but were the largest for spring-type wing. And in case of the same opening angle, these values were lower for the ship on sailing than that on stationary.
The Characteristic Calculation of the Wake through Cylinders by Vortex Method
Ro, Ki-Deok ; Oh, Se-Kyung ; Byun, Yong-Sue ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 76~83
DOI : 10.5916/jkosme.2010.34.1.076
The Characteristics of the flow field through cylinders with in-line and staggered arrangements were calculated by vortex method. Vortex distributions and velocity profiles around the cylinders with in-line and staggered arrangements were simulated at the pitch ratio of Pt/D=1.25~2.0 and Reynolds number of Re=
. As the results the vortices of clockwise at the upper separation point cylinder and the vortices of anticlockwise at the lower separation point of each cylinder were generated at both in-line and staggered arrangements. The generation of the reverse flow in the rear region of the cylinders was caused by the pitch ratio and Reynolds number, the boundary region was at the pitch ratio of Pt/D=1.5 and Reynolds number of Re=
in case of in-line arrangement and was at the pitch ratio of Pt/D=1.4 and Reynolds number of Re=
in case of staggered arrangement.
Numerical Visualization of Fluid Flow and Filtration Efficiency in Centrifugal Oil Purifier
Jung, Ho-Yun ; Choi, Yoon-Hwan ; Lee, Yeon-Won ; Doh, Deog-Hee ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 84~91
DOI : 10.5916/jkosme.2010.34.1.084
The centrifugal oil purifier is used in ships for purifying the engine lubrication oil. The momentum needed for the rotation of the cylindrical chamber is obtained by jet injections. The dust particles in the oil are separated by the centrifugal forces moving to the inner wall of the rotating cylindrical chamber body. The dust particles are eliminated when the particles are adsorbed onto the surface of the inner wall of the chamber body. The flow characteristics and the physical behaviours of particles in this centrifugal oil purifier have been investigated numerically and the filtration efficiencies have been evaluated. For the calculations, a commercial code has been used and the SST k-
turbulence model has been adopted. The MRF (Multiple Reference Frame) method has been introduced to consider the rotating effect of the flows. Under various variables, such as particle size, particle density and rotating speed, the filtration efficiencies have been evaluated. It has been verified that the filtration efficiency is increased with the increments of the particle size, the particle density and the rotating speed of the cylindrical chamber.
A Study on the Robust Control of Horizontal-Shaft Magnetic Bearing System Considering Perturbation
Kim, Chang-Hwa ; Jung, Byung-Gun ; Yang, Joo-Ho ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 92~101
DOI : 10.5916/jkosme.2010.34.1.092
Recently, the magnetic bearings which have many advantages such as no noise, less mechanical friction are widely applied to the suspension of rotors on the rotary machineries. However, the magnetic bearing system is inherently unstable, nonlinear and MIMO(multi-input-multi-output) system as well. In this paper, we design a state feedback controller using linear matrix inequality(LMI) to the multi-objective synthesis, for the magnetic bearing system with integral type servo system. The design objectives include
performance, asymptotic disturbance rejection, and time-domain constraints on the closed-loop pole location. The results of computer simulation show the validity of the designed controller.
Fuzzy modelling for design of ship's autopilot
Ahn, Jong-Kap ; Lee, Chang-Ho ; Lee, Yun-Hyung ; Son, Jung-Ki ; Lee, Soo-Lyong ; So, Myung-Ok ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 102~108
DOI : 10.5916/jkosme.2010.34.1.102
The T-S fuzzy model of a ship is made from the nonlinear extension of Nomoto's 2nd-order model as the previous step before designing of the fuzzy type autopilot to consider the design specifications and the economic efficiency. The T-S fuzzy model is considered as a design variable of the heading angular velocity of ship. The linear models will be combined as "IF-THEN" fuzzy rules after get in this one area of the linear model(sub-system) by change of the heading angular velocity of a ship. The dynamic characteristic of a ship with the parameters of linear models and fuzzy membership functions are estimated to match by using the model adjustment technic with input/output data and a RCGA.
Fuzzy Rule Based Trajectory Control of Mobile Robot
Lee, Yun-Hyung ; Jin, Gang-Gyoo ; Choi, Hyeung-Sik ; Park, Han-Il ; Jang, Ha-Lyong ; So, Myung-Ok ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 109~115
DOI : 10.5916/jkosme.2010.34.1.109
This paper deals with trajectory control of computer simulated mobile robot via fuzzy control. Mobile robot is controlled by Mamdani type fuzzy controller. Inputs of the fuzzy controller are angle between mobil robot and target, changed angle and output is the steering angle, which is control input. Fuzzy rules have seven rules and are selected by human experiential knowledge. Also we propose a scaling factors tuning scheme which is the another focus in designing fuzzy controller. In this paper, we adapt the RCGA which is well known in parameter optimization to adjust scaling factors. The simulation results show that the fuzzy control effectively realize trajectory stabilization of the mobile robot along a given reference target from various initial steering angles.
The Applied Status and Improvement of the Integrated Communication System for Naval Ship
Lee, Chae-Dong ; Shin, Woo-Seop ; Kim, Suk-Chan ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 116~124
DOI : 10.5916/jkosme.2010.34.1.116
The future warfare is changing to the NCW(Network Centric Warfare) from the platform-based warfare. Korea navy has been developing the KNCCS (Korea Naval Command and Control System) and the KNTDS (Korea Naval Tactical Data System) to prepare the NCW. Also, Korea navy has been using the ICS (Integraed Communication System) to transfer the command, control and tactical information on the naval ship. There is a lack of a systematic research and a reference material, although the ICS is a very important network on the naval ship. This paper is described the naval ICS. Also, a direction of the next Korea naval ICS is proposed.
Implementation of SoC for NMEA2000 Ship Standard Network Protocol Using FPGA
Park, Dong-Hyun ; Hong, Ji-Tae ; Kim, Kyung-Yup ; Yu, Yung-Ho ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 125~132
DOI : 10.5916/jkosme.2010.34.1.125
IEC61162-3 known as NMEA2000 protocol is approved as a standard network of SOLAS ship by ISO and used for the instrument network which exchanges data in real-time. For easy the development of ship network equipments, this study is focused on the development of SoC which can convert to NMEA2000 protocol from various kind of protocols such as TCP/IP, NMEA0183, RS422 and others using FPGA and u-Blaze. In this paper, we composed NMEA2000 protocol stack on FPGA and verified NMEA2000 network communication of FPGA system by connecting with commercialized devices through PC Hyper-terminal and network monitoring program.
A Study of Marine Network NMEA2000 for e-Navigation
Kim, Kyung-Yup ; Park, Dong-Hyun ; Shim, Jin-Bo ; Yu, Yung-Ho ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 133~140
DOI : 10.5916/jkosme.2010.34.1.133
NMEA2000 protocol known as IEC61162-3 of Multi-talker, Multi-listener, PnP communication is adopted as standard network for SOLAS ship by ISO in 2008 for e-navigation ages. NMEA2000 network uses well known CAN in physical layer. In this paper, address claim function is implemented for protocol converter device which can be used easily in combination with CPU of non network device. We are going to implement full function of NMEA2000 protocol and provide guideline to develop ship equipment to be networked easily.
A Design and Implementation of Service Modules in Middleware Server for Integrated Information Services on Shipboard
Hwang, Hun-Gyu ; Kim, Tae-Jong ; Yoon, Jin-Sik ; Seo, Jung-Min ; Park, Hyu-Chan ; Jang, Kil-Woong ; Lee, Jang-Se ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 141~146
DOI : 10.5916/jkosme.2010.34.1.141
In this paper, we design and implement middleware service modules of MiTS system architecture which is proposed for integrated shipboard information management. The MiTS system is divided to three layers that are gateway, middleware server and application. The gateway collects and parses information and data, the middleware server integrates the data and stores to a database, and the application displays visual data to users. The service modules provide MiTS middleware services to gateways and applications. We implement the service modules based on international standard IEC61162-4 series and test those.
An Objected-Oriented Design and C++ Implementation of MiTS Communication Protocol Specified in State Transitions
Park, Hyu-Chan ; Lee, Jang-Se ; Jang, Kil-Woong ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 147~153
DOI : 10.5916/jkosme.2010.34.1.147
MiTS Communication Protocol is a standard for the integrated processing and exchange of information on shipboard. It is specified in the form of state transitions as normal communication protocols. The design and implementation of such communication protocol require huge amount effort and time. To alleviate such burden, some systematic methodologies need to be devised. The design pattern may be the most adoptable one. This paper describes an object-oriented design and C++ implementation of MiTS Communication Protocol by adopting such methodology.
Simulation Methodology for Automation of Port Systems : Example of Container Terminal
Lee, Jang-Se ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 154~162
DOI : 10.5916/jkosme.2010.34.1.154
A simulation technique is very useful method to analyze the performance on various engineering area. To automate port systems, we have need of simulation to analyze an effect of assigning and operating devices. Thus we propose simulation methodology to be applied to an analysis, evaluation, planning for port automation. To do this, we have adopted the discrete event system specification based system entity structure / model base framework for modeling and simulation environment. We have performed modeling and simulation on entities of port systems such as container crane, yard tractor, transfer crane, etc. The proposed methodology has an advantage being able to effectively simulate on alternatives of composition and operation strategy for port systems. Some case studies will show the validity of proposed simulation methodology.
Settlement Characteristics of Square Reefs installed on Soft Seafloor Ground
Kim, Dae-Kweon ; Suh, Sung-Ho ; Cho, Jae-Kwon ; Kim, Chang-Gil ; Choi, Im-Ho ; Kim, Byoung-Sub ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 163~167
DOI : 10.5916/jkosme.2010.34.1.163
Square reefs of 2 groups installed at 1984 on mud and sandy-mud seafloor were compared with settlment conditions of those at Goheong coastal in middle-south sea of Korea at 2007. Reefs installed on mud and sandy-mud seafloor were settled to 1.9m and 2.4m, respectively. It suggest that a function of square reefs group installed on soft seafloor decrease over 50% after 20 years.
Investigation of conservation state of two types artificial reef on physical factors, immersed in Gang won coastal waters of the East Sea
Lee, Ji-Hyun ; Kim, Wan-Ki ; Ahn, Jung-Mi ; Lee, Chae-Sung ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 168~176
DOI : 10.5916/jkosme.2010.34.1.168
Stability and durability of the artificial reefs (ARs) for wildstock enhancement have been a key issue. We surveyed the side scan sonar (SSS), multi beam echo sounder (MBES) and scuba diving surveys confirmed that the ARs stability was age and type-dependent. A case of the stability of 8,438 ARs (60 group ARs) installed at 4 sites (Yangyang, Gangeung, Donghae and Samcheok) along the Gangwon coast of the East Sea (Sea of Japan). And a confirmation amount to 85.4% ARs remained safe, the rest 14.6% being influenced by a physical parameter of the waters. The representative influences by their circumstances were of breakage (6.3%). capsizing (8.3%). A group of a ARs to 61.7% ARs remained safe, the rest 38.3% being influenced by a physical parameter of the waters. The representative influences by their circumstances were of buried.
Investigation of Dice Artificial Reef Stability Installed (1981-2004 years) on Pohang Coast of the East Sea
Cho, Yong-Chul ; Kim, Wan-Ki ; Lee, Chae-Sung ; Kim, Nam-Il ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 177~182
DOI : 10.5916/jkosme.2010.34.1.177
Sediment transport around artificial habitat which is induced by the change of flow due to installation of the structure plays a role not only as a defect function of subsidence and burial but also bottom-environment control function. Using Side Scan Sonar (SSS), Differential Global Positioning System (DGPS) and Scuba diving equipment, we investigated a facility condition of a dice reef installed on Pohang coast of the East Sea. Investigation result, at total 139 place, 10,526 dice reef was discovered. As the level which affects function of the above 0.5m, the case 4 place of burial (0.5~1.2m, 2.9%), scour appeared with 3 place (0.5m, 2.2%) and broken was appeared with 183 artificial reefs (1.74%). As a result, dice reef installed Pohang coast appeared to mostly stable.
A Suitability Selection for Marine Afforestation with Physical Environments
Oh, Tae-Geon ; Kim, Dae-Kweon ; Kim, Chang-Gil ; Lee, Moon-Ock ; Cho, Jae-Kweon ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 183~194
DOI : 10.5916/jkosme.2010.34.1.183
A suitability analysis for marine afforestation was carried out on physical items based on slop rate, bottom sediment, light intensity, velocity, and wave at north Geomoon waters in Korea. The data from each physical item were changed to a GSDM (Gridded Spatial Distribution Map) using Kriging interpolation. A GSDM grid includes information, and each grid was given a SI (suitability index) of 3 grades(SI of first suitability was 100, SI of second suitability was 50, and non-suitability had no SI). According to the analysis results of all overlaid GSDM, first suitability had 500 SI, and suitability area was 0.25ha. Second and third suitability had 400~450 SI, and suitability area was 2.36ha, 1.80ha, respectively. Therefore, the results suggest that reefs installed for marine afforestation should be anti-slip types against steep slope, and the target species need to include algae with low compensation light intensity in second and third suitability.
Control Algorithm Development for Design of Cooling System in High-power Propulsion Motor
Oh, Jin-Seok ; Jung, Sung-Young ; Kong, Yeong-Kyung ; Bin, Jae-Goo ; Kim, Han-Ho ;
Journal of the Korean Society of Marine Engineering, volume 34, issue 1, 2010, Pages 195~201
DOI : 10.5916/jkosme.2010.34.1.195
In this paper, a cooling system of high-power propulsion motor with Energy Saving System(ESS) is described. Normally, the cooling system for ship consists of fresh water pump, sea water pump, 3-way valve and cooler. In the cooling system, F.W(Fresh Water) and S.W(Sea Water) pump is operated on rated rpm, and the 3-way valve is controlled for preventing over-cooling. So, the consumption power of pump's motor is changed according to a sea water temperature. In the proposed cooling system, F.W. pump and S.W pump is controlled by inverter, and it is can be reduced the consumption power. Also, it is proved with simulation.