A Study on the Unsteady Flow Characteristics Analysis of Intake and Exhaust Pipe in 4 Cycle Spark-Ignition Engine

4사이클 전기점화기관에서 흡.배기관내 비정상 유동특성 해석에 관한 연구

This study discribes result of comparision of two other numerical method, method of characteristics (MOC) and Lax-Wendroff method(LWM) applied at wave action analysis of Intake and exhaust pipe. Partiality FCT(Flux Correct Transport) scheme is appeneded to LWM to protest unacceptable overshoots, occuring near discontinuity. The final conclusion of this study is that MOC should be replaced by a second order finite difference approach(such as the LW method). Clear benefits we can get by change are faster calculation, higher accuracy, conservation of mass and consistent calculation method.