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本文提出一种实用的燃烧过程的计算方法.这种方法的特点是燃烧以球面波传播,由气体膨胀速度和紊流燃烧速度决定火焰传播速度,充分考虑流埸、浓度埸对燃烧过程的影响.本文提出计算火焰传播速度的公式,决定燃烧初值的一般方法,普通电火花点火时已、未燃充量单位质量焓相等的初始条件,以及计算复杂形状燃烧室火焰前锋面积和传热面积的“拚块”结构算法.编制出计算普通汽油机燃烧过程的通用程序,并进行一个实例计算.计算结果与实验结果基本一致,排污计算结果反映正确的变化趋势.
In this paper, a practical calculation method of combustion process is proposed, which is characterized by that the combustion propagates in the form of spherical waves, and the propagation speed of the flame is determined by the gas expansion velocity and the turbulent combustion velocity, taking full account of the influence of the flow 埸 and concentration 埸 on the combustion process In this paper, the formulas for calculating the propagation velocity of flame, the general method for determining the initial combustion value, the initial conditions for the normal spark ignition, the equal mass enthalpy of unburned charge, and the calculation of the flame front area and the heat transfer area , A general algorithm for calculating the combustion process of common gasoline engine is developed and an example calculation is made.The calculation results are basically consistent with the experimental results and the calculation results reflect the correct trend.