Recently, as demand for Electric Car has been increasing, it has been a main factor that maximizing performance and ensuring the stability of the Electric Car battery to increase the reliability of Electric Car. Above all the study on thermal control in a big influence on the performance and battery life is growing in parallel. This study has compared cooling effect of an Electric Car battery between battery with Heat Sink and without Heat Sink for optimum design of Electric Car battery. Battery is simply modeled into four cells, divided into two cases of battery with Heat Sink that attached on the cell's side and without Heat Sink. And this research was conducted on forced convection. The battery which is designed by this way was numerically analyzed by CFX 14.5. Numerical results, revealed that the battery with Heat Sink was superior in terms of cooling effect. According to the numerical analysis by battery cell's temperature variations, the battery with Heat Sink turned out to be superior in cooling effect to the battery without Heat Sink.

Recently, car industry trend is downsizing, a lean-burn engine, green car and cost cutting. A turbocharger is the key components to improve fuel efficiency and power. This research is to study on the flow analysis in the performance analysis for change rotating speed of turbocharger turbine with three different rotating speed in the turbine. After measuring real design features, modeling, velocity distribution, pressure distribution and temperature distribution are conducted numerically. Torque and power are compared with three different cases in order to analyze the performance for turbine. Finally, optimum power is determined with the sequence of case 1, case 2, and case 3.

Recently, car pump market is positively growing in emerging countries as well as advanced countries. A increasing attention is recently drawn to electric vehicle but, still commercialization is expected to take a long time. This research is to study on the performance analysis for change in number of teeth of internal gear oil pump with three different numbers of teeth in the inner gear. After measuring real design features, modeling, velocity distribution and pressure distribution are conducted numerically. Pressure changes and volumetric efficiencies are compared with three different cases in order to analyze the performance for inner gears. Finally, optimum volumetric efficiency is determined with the sequence of case 1, case 2, and case 3.

2011년에 발생한 동일본 대지진 이후 우리나라에서도 지진 및 지진해일에 대한 관심이 높아졌다. 본 연구에서는 가능최대지진해일에 의한 지진해일의 침수피해특성을 분석하기 위한 방법을 제시하였다. 분석 대상지역은 2012여수세계박람회가 개최되었던 여수시의 여수신항과 여수구항의 항만권역으로 설정하였으며, 지진원 설정은 대상지역에 가장 영향을 크게 미칠 것이라 판단되는 류큐 트렌치로 하였다. 류큐 트렌치에서 발생 가능한 가능최대지진해일을 산정하기 위하여 역사지진자료와 가상지진자료를 활용하였다. 역사지진자료를 이용해 Tapered G-R 기법을 적용하여 회귀식을 산정하고 가능최대지진해일을 발생시키는 지진을 도출하였으며, 이를 바탕으로 가상지진자료를 구성하고 타당성을 검토하였다. 최종 산정된 가능최대지진해일을 수치모의 하여 대상지역의 침수영역 및 침수심을 산정하였다. 또한, 지진해일로 발생하는 해안지역의 침수피해액 산정을 위하여 다차원침수피해액 산정방법을 기반으로 하는 침수피해액 산정방법을 제시하고자 한다. 본 연구에서는 침수면적, 침수심, 침수피해액간의 관계를 바탕으로 해당 지역의 침수특성을 비롯하여 해안지역의 지진해일로 인한 침수특성을 도출하고자 한다.