释热分布对超燃冲压发动机性能的影响及优化

Investigation of the effect and optimization of heat release distributions in the combustor on scramjet performance

关键词:  超燃冲压发动机  推力性能  释热分布  模拟退火算法

Key words:  Scramjet  Thrust  Heat release distribution  Simulation annealing algorithm

摘要:

为了改进燃烧室、尾喷管的设计和优化燃料在燃烧室内的释热方案,建立了广义一维流动/释热分析方法,对超燃冲压模型发动机的主要性能参数进行了研究。通过与单凹腔模型发动机实验结果的对比,着重分析了燃料在燃烧室内不同的释热分布对模型发动机推力性能的影响,同时采用模拟退火优化算法对发动机燃烧室内释热分布和内流道作了优化,结果表明,在燃烧室内采用多阶段分散释热方案对模型发动机推力性能有较大的提高。

Abstract:

In order to design the combustor and nozzle of the scramjet,and to optimize the distribution of the heat release in the combustor,a one-dimensional flow analysis method was developed.This method can evaluate the performance of the model of scramjet engine.Compared with the experimental static pressure distribution,the heat release distribution can be obtained by the analysis tool.At the same time,the heat release distribution and scramjet inner configuration were optimized by general simulated annealing.The results show that the performance of the model engine could be improved when the heat release spreads along the combustor.