Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Marine Engineering
Journal Basic Information
Journal DOI :
Korean Society of Marine Engineers
Editor in Chief :
Volume & Issues
Volume 27, Issue 7 - Nov 2003
Volume 27, Issue 6 - Sep 2003
Volume 27, Issue 5 - Jul 2003
Volume 27, Issue 4 - Jul 2003
Volume 27, Issue 3 - May 2003
Volume 27, Issue 2 - Mar 2003
Volume 27, Issue 1 - Jan 2003
Selecting the target year
The Trend of Development on Propulsion System of Electric Propulsion Ship
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 548~554
A Tendency of Natural Energy Development
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 555~564
About a Competitive Information System of‘HUB Harbor’as a Logistics Center in the North East Asean Region
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 565~574
Development Process of Ship Automation
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 575~580
Experimental Study on the Measurement Method of Heat Transfer Coefficients Using a Transient Liquid Crystal Technique
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 581~588
Heat transfer characteristics of a pair of longitudinal vortices using a transient liquid crystal technique are studied experimentally. In order to control the strength of longitudinal vortices, angle of attack of the vortex generators is
and the length of space from the centerline the vortex generations is 25mm apart. The heat transfer measurements using a transfer coefficients. The following conclusions are obtained from the present experiment. When any vortex generators are not set up in wind tunnel test, heat transfer rate is low respectively. However, with the vortex generators of rectangular winglet, the heat transfer on the local surface can be enhanced.
Friction-Based and Acoustically-Levitated Object Transport Using Ultrasonic Vibration
Byoung-Gook Loh ; Yong-Kuk Park ;
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 590~599
In this study. object transport method based on ultrasonic flexural vibration is presented. Ultrasonic vibration generates ultrasonic traveling waves on the surface of elastic medium. Objects are transported through the interaction with traveling waves propagating in medium. Two types of transport methods are studied： frictional drive and acoustic levitation. With frictional drive, objects are transported in contact with the beam in the opposite direction of wave propagation whereas with acoustic levitation, objects are acoustically levitated above the beam surface and transported in the wave propagation direction. Transport characteristics are experimentally investigated using objects of different shapes and sizes. The transition from acoustic levitation mode to frictional drive mode is also examined. and it is found to occur when the ratio of mass to area of an object exceeds the threshold ratio of mass to area. It is envisaged that this feasibility study will serve as a stepping-stone for ultrasonic vibration to become an effective industrial material handling device in the future.
Effects of Wavy Tapers on Heat Transfer in the Reciprocating Rectangular Channel
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 600~608
This Paper describes a detailed experimental investigation of heat transfer in a reciprocating smooth rectangular duct having only the bottom wall heated with reference to the design of a piston for a marine propulsive diesel engine The Parametric test matrix involves Reynolds number and reciprocating radius, respectively, in the range of 1.280∼4.100, and 7∼15 cm with five different reciprocating frequency tested. namely. 1.7, 2.2, and 2.6 Hz. The effects of three different hemi-triangular wavy type tapers on the heat transfer in the reciprocating rectangular channel using the air as a working fluid were check out. The present work confirms that the Nusselt number in the channel with the triangular wavy type taper is lower than without the triangular wavy type taper.
An Adaptive Speed Control of a Diesel Engine by means of a Model Matching method and the Nominal Model Tracking Method
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 609~616
The purpose of this study is to design the adaptive speed control system of a marine diesel engine by combining the Model Matching Method and the Nominal Model Tracking Method. The authors proposed already a new method to determine efficiently the PID control Parameters by the Model Matching Method. typically taking a marine diesel engine as a non-oscillatory second-order system. But. actually it is very difficult to find out the exact model of a diesel engine. Therefore, when diesel engine model and actual diesel engine are unmatched as an another approach to promote the speed control characteristics of a marine diesel engine, this paper Proposes a Model Reference Adaptive Speed Control system of a diesel engine, in which PID control system for the model of a diesel engine is adopted as the nominal model and Fuzzy controller and derivative operator are adopted as the adaptive controller.
A Study on the Vertical upward Bubble Flow using Image Processing Technique
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 617~623
In the present study, the characteristics of upward bubble flow were experimentally investigated in a liquid bath. The velocity of upward bubble flow was calculated for two different experimental conditions：1) bubble flow without kinetic energy 2) bubble flow with kinetic energy. Bubble flow without kinetic energy starts to undergo the effect of buoyancy l0cm away from the nozzle. Whereas. kinetic energy is dominant before 30 cm away from the nozzle in bubble flow but after this point kinetic energy and inertial force are applied on bubble flow at the same time In addition, as the flow rate increases the maximum velocity point moves to the nozzle. The velocity Profiles near free surface is extremely irregular due to surface flow. Gas volume fraction is high near the nozzle due to gas concentration. but decreases with the increasement of axial position. Gas volume fraction does not vary after the axial position, z=60 in spite of the increasement of flow.
A Study of Heat Flux and Instantaneous Temperature According to the Equivalence Ratio in a Constant Volume Combustion Chamber
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 624~632
In the gasoline engine industry. there has been a trend towards the development of high performance engines with improved fuel efficiency, reduced weight and smaller sizes. These trends help to solved engine problems related to thermal load and abnormal combustion. In order to investigate these Problems, a thin film-type probe for instantaneously measuring temperatures has been suggested. A method for manufacturing such a probe was established in this study. The instantaneous surface temperature of a constant volume combustion chamber was measured by this probe and the heat flux was obtained through Fourier analysis. A peak instantaneous temperature was obtained after 55∼60 ms from ignition and the temperature increased according to an equivalence ratio and varied differently according to the position of the probe. Total heat loss during combustion period was affected by the equivalence ratio and differed widely in accordance to the position of the probe.
A Study on Flow Characteristics and Efficiency in Guide Vane of Diffuser Pump Using PIV Measurement
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 633~640
The present experimental study is focused on the application of multi-point simultaneous measurement by PIV(Particle Image Velocimetry) to guide vane region within diffuser pump. Various different kinds of rotational velocity were selected as experimental condition. Optimized cross correlation Identification to obtain velocity vectors is implemented with direct calculation of correlation coefficients. Fine optical setup concerned with PIV performance is arranged for the accurate PIV measurement of high-speed complex flow. Variable flow pattern are represented quantitatively at the stator region.
A study on the characteristic analysis and correction of non-linear bias error of an infrared range finder sensor for a mobile robot
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 641~647
The use of infrared range-finder sensor as the environment recognition system for mobile robot have the advantage of low sensing cost compared with the use of other vision sensor such as laser finder CCD camera. However, it is not easy to find the previous works on the use of infrared range-finder sensor for a mobile robot because of the non-linear characteristic of that. This paper describes the error due to non-linearity of a sensor and the correction of it using neural network. The neural network consists of multi-layer perception and Levenberg-Marquardt algorithm is applied to learning it. The effectiveness of the proposed algorithm is verified from experiment.
An Experimental Study on Turbulent Flow in 90 Degree Bend by using PIV Techiqure
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 648~656
An experimental research was performed to study turbulent flow characteristic in a
circular bend by using the PIV(Particle Image Velocimetry) method, this study found the time-mean velocity distribution, time-mean turbulent intensity with turbulent flow for Re = 10,000, 15,000, 20,000, and 25,000 along the test bend. It was found that the highest streamwise velocity of turbulent flow occurs near y/D = 0.5 and the flow moved to y/D =0.15. The peak turbulence intensity shifted toward the concave wall from
increased. the intensity decayed along the test tube.
Combined De-NOx Process with
SCR and Non-thermal Plasma Process for Removing NOx and Soot from Diesel Exhaust Gases
Chung, Kyung-Yul ; Song, Young-Hoon ; Oh, Sang-Hoon ;
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 657~665
Combined De-NOx Process in which
SCR (Selective Catalytic Reduction) and non-thermal Plasma Process are simultaneously used, has been investigated with a pilot test facility. The pilot test facility treats the combustion flue gases exhausted from a diesel engine that generates 240 kW of electrical power. Test results show that up to 80 % of NOx (NO and NO2) can be removed at 100 -
. None of conventional De-NOx techniques works under such low temperature range. In addition to NOx. the Pilot test results show that soot can be simultaneously treated with the present non-thermal plasma technique. The present pilot test shows that the electrical power consumption to operate the non-thermal plasma reactor is equivalent to 3 - 4 % of the electrical power generated by the diesel engine.
An Experimental Study on Swirling Flow in a Cylindrical Annuli by Using PIV Technique
Journal of the Korean Society of Marine Engineering, volume 27, issue 5, 2003, Pages 666~674
An experimental investigation was performed to study the characteristics of turbulent swirling flow in an axisymmetric annuli. The swirl angle measurements were performed by flow visualization technique using smoke and dye liquid along the test tube. Using the Particle Image Velocimetry method, this study found the time-mean velocity distribution and turbulent intensity with swirl for Re = 20.000. 30.000, 50.000. and 70.000 along longitudinal sections and the results appear to be physically reasonable.