低排放燃烧室化学反应器网络模型的参数化

为了掌握低排放燃烧室的污染物排放情况,对其化学反应网络器(CRN)模型的参数化进行研究.对爬升工况下燃烧室CFD数值模拟结果进行分析,划分燃烧室的结构,得到燃烧室的CRN模型.再利用自编程软件对燃烧室的结构参数和进口参数进行参数化定义,并把参数化的CRN模型在不同工况下的模拟结果与试验结果分别比较.结果表明:在慢车工况下二者相差不大,在爬升工况下二者差异也在允许误差范围之内.验证了该模型可行性较好,该参数化CRN模型可用于预测低排放燃烧室的污染物排放量和出口温度.

Parameterized Chemical Reactor Networks Molds of Low-Emission Combustor

To solve the lack of ability problem for evaluate engine performance based on single parameter, the method of evaluating engine performance based on multiple parameters was studied. By analyzing the bench test data for an aeroengine, the results show that the synthetic weighted method was more rational than arithmetic weighted mean method for evaluating engine performance. Weights of multiple parameters were calculated by the improved genetic algorithm and particle swarm optimization algorithm. The comparative study shows that the improved particle swarm algorithm is superior to the improved genetic algorithm in the calculation result. Finally, the engine performance index of each overhaul was calculated.