고속열차의 압축기 적용 효과 분석을 위한무격자 방식의 유동해석 프로그램 개발 = DEVELOPMENT OF FLOW ANALYSIS PROGRAM WITH MESHLESS METHOD FOR A STUDY ON THE EFFECT OF COMPRESSOR APPLICATION ON THE HIGH-SPEED TRAIN

다국어 초록 (Multilingual Abstract)

A computational fluid analysis program was developed to analyze aerodynamic phenomena as High-speed trains pass through tunnels. For robust and accurate analysis of moving object and thin boundary layers, a meshless method with least square method that satisfies geometric conservation law (GC-LSM) is introduced to analyze the flow field with only the connectivity between points without volume grid information. The developed program was validated through some problems and comparisons with other studies, confirming that the flow analysis was possible within the error (3.6%) similar to the existing flow analysis program. We also qualitatively analyze the effect of how aerodynamic problems are alleviated when compressors are applied to High-speed trains. The maximum intensity of pressure wave decreased by 15.6% and the intensity of the micro-pressure wave decreased by 13.5%, suggesting the possibility of excellent effect through the compressor.

참고문헌 (Reference)

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