According to the characteristics of HS-990 engine, a quasi-dimensional model for in-cylinder working process is developed and the computational boundary conditions are correctly determined.
根据HS - 990型发动机缸内工作过程的特点，建立了缸内工作过程准维模型，并恰当地确定了计算的边界条件。
A thermodynamic and a 2-d numerical computational model are proposed for calculating the discharge coefficient of connecting passage of swirl chamber diesel engine.
建立了计算涡流室柴油机连接通道流量系数的热力学模型和二堆数值计算模型。
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