CAJ | 학술논문

采用瞬态可压缩黏性流体微分方程和标准k-ε双方程紊流模型对某增压汽油机进气过程的流体流动特性进行数值模拟。计算结果表明，缸内瞬时温度和压力的变化，主要受到气缸内壁和新鲜充量传热以及活塞运动的影响，而进气道内瞬时温度的变化与进气道内气流运动的湍流强度密切相关。因此，要提高该汽油机的充量系数，最合理的办法是抑制进气道内的湍流强度。
채용순태가압축점성류체미분방정화표준k-ε쌍방정문류모형대모증압기유궤진기과정적류체류동특성진행수치모의。계산결과표명，항내순시온도화압력적변화，주요수도기항내벽화신선충량전열이급활새운동적영향，이진기도내순시온도적변화여진기도내기류운동적단류강도밀절상관。인차，요제고해기유궤적충량계수，최합리적판법시억제진기도내적단류강도。
Based on differential equations of transient compressible viscosity fluid and k-ε two equation turbulent models, numerical analysis of flow filed for Intake process of certain turbocharged gasoline engine was done. The results show that the changes of the transient temperature and pressure in cylinder is affected by the Heat Transfer of the inner wall of cylinder, fresh charge and the motion of the piston, but the changes of transient temperature in intake port is closely related to the turbulence intensity of airflow motion, therefore, in order to improve volumetric efficiency of this gasoline engine, Inhibition of turbulence intensity in intake port is an effective measure.