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本文使用双区、热力学放热模型来分析独特的方形活塞发动机模拟器气缸中的压力历程,并计算已燃气体质量分数、放热速率、未燃和已燃气体的总体和核心温度。本试验包括火花点火、等离子体射流点火以及产生挤气和不产生挤气的活塞形状等四种情况。最后确定放热模型应用于方形活塞发动机试验要求,修改漏气模型,估算进气充量温度和燃料在气缸壁上的凝聚量。计算结果指出,使用等离子体射流点火器将会使火焰核成长速度变快。使用挤气活塞将导致火焰传播速度加快。
This paper uses a two-zone, thermodynamic exothermic model to analyze the pressure history in a unique square piston engine simulator cylinder and calculates the mass fraction of gas burned, the rate of heat release, the overall and core temperatures of unburned and burned gases. This test includes four cases of spark ignition, plasma jet ignition, and piston shapes that generate squish and do not squish. Finally, it is determined that the exothermic model is applied to the test requirements of the square piston engine, and the leakage model is modified to estimate the temperature of intake charge and the amount of fuel agglomeration on the cylinder wall. The calculation results show that the use of plasma jet igniter will make the flame nuclei grow faster. Using a squirt piston will result in faster flame propagation.