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利用商用软件对环形燃烧室从慢车到最大状态的过渡态过程进行了数值模拟,并通过与传统的工程计算方法(利用稳态计算来近似过渡态计算)得到的结果进行分析比较,研究了过渡态过程对燃烧室温度场的影响,结果表明:①过渡态计算与对应工况点的单点稳态计算存在一定的差别,主要表现在稳态计算的出口温度比过渡态计算的整体偏高;②时间步长是影响过渡态计算的关键因素,较小的时间步长能够使不同时刻流场参数之间的相互联系更加紧密,计算结果也就更接近于过渡态的真实过程;③过渡态计算中出口平均温度相对于油气比的变化在时间上具有一定的滞后性.
The commercial software was used to numerically simulate the transient state of the toroidal combustion chamber from the local vehicle to the maximum state, and the results were analyzed and compared with the results obtained by the traditional engineering calculation method (approximate transition state calculation by steady state calculation) State process on the temperature field of the combustion chamber. The results show that: ① There is a certain difference between single-point steady state calculation of transition state and corresponding working point, which is mainly reflected in that the outlet temperature of steady state calculation is higher than that of transition state ; ② time step is the key factor that affects the transition state calculation. The smaller time step can make the flow field parameters at different time more closely interlinked, and the calculation result is closer to the real transition state. ③ The transition In the state calculation, the outlet average temperature has some lag in time with respect to the change of the oil-gas ratio.