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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Transactions of the KSME C: Industrial Technology and Innovation
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Journal DOI :
The Korean Society of Mechanical Engineers
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Volume & Issues
Volume 2, Issue 2 - Sep 2014
Volume 2, Issue 1 - Mar 2014
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Capacitance Fuel Sensor for Commercial Vehicle Software Verification Through R-BENCH TOOL
Kim, Sang Woo ; Lee, Ju Hyoung ; Son, Jung Hyun ; Lee, Soo Ho ; Lee, Duck Jin ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 2, issue 1, 2014, Pages 1~8
DOI : 10.3795/KSME-C.2014.2.1.001
Recently vehicle development trend changes from machinery vehicle to the electrical and electronic devices. As well the electrical and electronic devices commercial vehicles are increasing more than machinery system. The capacitance fuel sensor is a sensor that, by measuring the capacitance value of fuel level sensor MCU operating for the final voltage value of the signal output. That is increasing durability and fuel measurement accuracy more than conventional ceramic resistor type. For Sensor software verification R-BENCH TOOL generated test case automatically. We make the programmable Capacitor board for test. And it was confirmed that more than 98% of the high reliability of the software.
The Experimental Study on the Correlation of the Interior Noise of a Driving Vehicle with Lateral Dynamic Stiffness of the Wheel
Kim, Byung-Jin ; Sa, Jung-Hwan ; Park, Jin-Sung ; Park, Hyun-Woo ; Cho, Seong-Keun ; Jeong, Heon Sul ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 2, issue 1, 2014, Pages 9~13
DOI : 10.3795/KSME-C.2014.2.1.009
Nowadays, among several reasons for customers to choose their own cars, NVH performance plays much important role. The concern for the car interior noise is increasing recently, because electric cars and hybrid cars generate less engine noise which was the main noise of traditional cars. According to oversea references, high Lateral Dynamic Stiffness (LDS) of vehicle wheels is described to reduce Structure Bone Noise (SBN) which is being generated while driving cars. However availablet test standards and test results are not enough, in this study the interior noise has been measured after attaching a same tyre to several wheels which has different Lateral Dynamic Stiffness. The test has verified that the interior noise differs depending on Lateral Dynamic Stiffness of wheels. As to this, the reduction of the interior noise can be possible with the optimal design of the wheel.
Improvement of Efficacy by Applying Intuitive Learning and Group Investigation Methods on Engineering Education
Ma, Jeong Beom ; Kim, Jong Hyun ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 2, issue 1, 2014, Pages 15~20
DOI : 10.3795/KSME-C.2014.2.1.015
Intuitive learning method was applied at the beginning of each lecture to induce students to draw their interests. Avoiding simple explanation of equations and problem solving by using them, we repeated theoretical concepts verbally and applied physical meanings when we developed and wrote equations. By these methods we expected to find a way to increase students' learning effects. We also took a group investigation on pursuing term projects. Students choose their own subjects individually and submitted reports according to the time schedule. The reports included the contents that they learned during classes. After choosing best reports for each group by instructor, students at each group divided roles and prepared presentations. Thorough these methods they increased their scores from mid-term to final exams, and got aquatinted with responsibilities among group and organizations. They also experienced physical meanings from the usual daily life phenomena which could be connected to the engineering concepts and improved abilities as junior engineers.
Application of MS Excel in Teaching Statics
Kim, Youngheub ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 2, issue 1, 2014, Pages 21~28
DOI : 10.3795/KSME-C.2014.2.1.021
As one of the most famous spreadsheet programs that is widely applied to a variety of fields in business, MS Excel has also been used for educational purposes due to its feature of wide accessibility, enabling students to use the program through almost any kind of PC that now exists. The program is mainly used for numerical analysis and formulae applications in the fields of science and engineering. This paper shall provide the key to understanding the application of MS Excel to teaching Statics through the illustration of its essential functions for education. Also, the development process of the analysis program using macros and VBA(Visual Basic for Applications) is described for the deeper comprehension of advanced applications. Students were not only able to solve the Statics problems using basic features of MS Excel, but also discovered new systematic methods of approaching complex problems and developed application programs using macros and VBA.
Numerical Study on Aerodynamic Characteristics of Kline-Fogleman Airfoil and Its 3D Application at Low Reynolds Number
Roh, Nahyeon ; Yee, Kwanjung ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 2, issue 1, 2014, Pages 29~37
DOI : 10.3795/KSME-C.2014.2.1.029
In this study, analyzed the aerodynamic characteristics of Kline-Fogleman airfoils and wings with those more efficiency at low Reynolds number. It was found that lift to drag ratio is enhanced in the range of Reynolds number below
, especially, can be improved up to 26% at Reynolds number is
. It was confirmed that the most advantage case in terms of lift-to-drag ratio is Middle case and lift-to-drag ratio is improved to 20% at 80% of the wing area is Kline-Folgeman airfoil. At this time, endurance time increase to 12%. Also taking the structural stability of the wing and lift-to-drag improvement into account, designed to be from 50% to 80% the size of the Kline-Fogleman Airfoil would be advantageous.
Numerical Analysis of Aerodynamics Characteristics of Two Dimensional Airfoil Section with Elastic Flap
Won, Chang-Hee ; Lee, Joo-Yong ; Lee, Sungsu ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 2, issue 1, 2014, Pages 39~46
DOI : 10.3795/KSME-C.2014.2.1.039
This study presents computational analysis of aerodynamic characteristics of two-dimensional airfoil sections with elastic flap attached at the trailing edge. EDISON_CFD was utilized to simulate the incompressible turbulent flow around the foil and MIDAS_IT was employed to estimate the deflection of the flap under the pressure loading. Using iterative procedure, the terminal deflection was estimated and the resulting lift-drag ratio indicates that the favorable effect of the flap is expected within certain amount of angle of attack.
An Analytical Study on the Performance Analysis of a Desalination System by Condensing Method
Kim, Chul-Ho ; Kim, Won-Il ; Choi, Jea-Young ; Kim, Jae-Choul ; Kim, Min-Sun ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 2, issue 1, 2014, Pages 47~55
DOI : 10.3795/KSME-C.2014.2.1.047
A new concept of an Eco-friendly desalination method is introduced in this study. The main idea of the desalination method of seawater is the condensation of the vaporized seawater by solar heat energy on the surface of seashore. The wind turbine blade plays a role of heat exchanger condensing the vaporized water in the air. In this analytical study, the availability of the proposed desalination system was studied. First, an analytical condensation theory of the vaporized water in air was arranged and the parametric study was conducted to estimate the amount of freshwater produced from the system with the change of the temperature difference between the humid air and turbine blade, and the relative humidity in air, and wind speed. From the analytical calculation, 2,927(ton/year) of freshwater was produced at the vertical-type wind turbine (Diameter=4m, Height=3m) as the relative humidity is 100%, the temperature difference between the impeller blade and the humid air is
and the wind speed is 10m/s.
Development of a New Air Cooling System Utilizing the Stirling Engine for Preventing Solar Cell from Overheating
Kim, Hyoungeun ; Park, Chanwoo ; Chu, Jinkyung ; Keum, Dongyeop ; Park, Silro ; Kim, Jeongmin ; Kim, Daejin ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 2, issue 1, 2014, Pages 57~63
DOI : 10.3795/KSME-C.2014.2.1.057
In this paper new air-cooling system utilizing Stirling engine was proposed for improving efficiency in solar photovoltaic power generation. The solar cell plate was equipped with semi-circular channel for air flow on the backside. Beta-type Stirling engine was installed on the plate and its flywheel was connected to a motor fan by a transmission belt. A forced convective air flow for heat radiation was generated by the operation of the self-starting Stirling engine. The performance tests for power generation of solar cell with or without the proposed air-cooling system were conducted under halogen lamp. From the experimental results, it was found that decline in output voltage of the solar cell with proposed cooling system was 25% less than that of the solar cell without cooling system.
Performance Improvement of Stratified Thermal Storage Tank Using Heat Insulator
Lim, Se Hwa ; Lee, Tae Gyu ; Shin, Seungwon ;
Transactions of the KSME C: Industrial Technology and Innovation, volume 2, issue 1, 2014, Pages 65~72
DOI : 10.3795/KSME-C.2014.2.1.065
The purpose of this study is to design a heat insulator for reducing available energy loss in stratified thermal storage tank. Heat insulator is operated by buoyancy effect from density difference between hot and cold water without extra equipment. Analysis model using the Matlab Simulink was developed to estimate the internal temperature distribution in thermal storage tank and also used to select proper material and thickness of the heat insulator. Operational feasibility was confirmed through reduced scale experiment. As a result, heat insulator can effectively delay the formation of thermal boundary layer between hot and cold water. In reduced scale experiment, heat insulator can preserve additional 1540J of available energy. When applied to the real thermal storage tank, increase of 6% thermal storage efficiency can be expected.