【摘要】 在理论分析的基础上对原有直接喷射分层燃烧转子发动机性能模拟模型中的一些子模型进行了改进。用改进后的模型预测了转子发动机在不同工况下燃烧室内工质压力、温度的变化及转子周壁的传热量、缝隙体积和漏气面积对燃烧室内工质压力的影响,用试验数据拟合得出了平均机械损失压力随转速变化的关系式,并将预测结果与试验结果进行了对比。结果表明:改进后的模型具有更高的计算精度且稳定性好,能满足工程实用的要求。更多还原

【Abstract】 An improved mathematical simulation has been developed to predict the performance of a directinjection stratifiedcharge rotary combustion engine on the original thermodynamic cycle model.The novel feature of the codes is their treatment of the main characteristics of Wankle mechanisms:heat transfer, leakage and crevice volume effects.With the model,the chamber pressure and temperature are available during a complete engine cycle.The overall engine performance parameters can be calculated by means of the predicted chamber pressure and an empirical relationship between the mean mechanical loss pressure and the engine speed on the measured results.The model can be used as an analysis tool for the DISC rotary combustion engine design.更多还原