Euler equations of generalized Riemann variable are derived from unsteady primitive variable Euler equations and solved by using two - a point-two-step upwind finite difference method.
该方法将原参数非定常欧拉方程组重新组合成以广义黎曼变量表示的欧拉方程组，再用二点二步迎风格式离散求解。
Two methods of determining ignition advance Angle are proposed according to different reference point, and the reason for this difference of the two methods are analyzed.
按参考点的不同，提出了两种确定点火提前角的方法，并分析了两种方法产生差别的原因。
Two methods of determining ignition advance Angle are proposed according to different reference point, and the reason for this difference of the two methods are analyzed.
按参考点的不同，提出了两种确定点火提前角的方法，并分析了两种方法产生差别的原因。
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