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本文建立了微型摆式发动机(MICSE)热力循环分析的零维数学模型,研究了点火提前系数k及燃烧持续时间τ_b对MICSE性能及其腔内热力过程的影响。结果表明减少τ_b或增加k,可使热力过程中的温度及压力更快地达到峰值。当k一定时,τ_b越大,温度峰值越低。对于τ_b较小的燃料,k越大,压力峰值越低.而对于τ_b较大的燃料,k值变化几乎不影响压力峰值的变化。使用τ_b较小的燃料时,k越大,发动机功率和效率越低.而使用τ_b较大的燃料时,k存在最优值,使发动机功率与效率最大。
In this paper, a zero-dimensional mathematical model of the thermodynamic cycle of a micro-tilting engine (MICSE) was established. The effects of the ignition advance coefficient k and the combustion duration τ_b on the MICSE performance and its intracavity thermal process were studied. The results show that reducing τ_b or increasing k can peak the temperature and pressure in the thermal process more quickly. When k is constant, the larger τ_b, the lower the temperature peak. For the smaller τ b fuel, the larger the value of k, the lower the pressure peak, whereas for the larger τ b fuel, the change of k has little effect on the change of pressure peak. With smaller τ b fuels, the greater the power k, the lower the engine power and efficiency, whereas the higher k fuel has the highest k, maximizing engine power and efficiency.