超燃冲压发动机性能的准二维计算方法

Quasi-Two-Dimensional Evaluation of the Scramjet Performance

中文关键词:  超燃冲压发动机  性能预估  数值模拟 

英文关键词:Scramjet  Performance evaluation  Numerical simulation

中文摘要:

      为了能在双模态超燃冲压发动机流道方案初步论证中提供一种较快速的发动机性能计算方法,在二维N-S方程基础上,引入一维完全燃烧计算方法,提出了预估超燃冲压发动机性能的准二维计算方法。该方法能够计入激波、边界层分离等对发动机性能的影响,可在较短时间计算出整机推力、比冲性能和沿程热力学参数。通过对自由射流发动机计算,验证了此方法。并在此基础上,初步分析了燃料喷注位置和流道构型对发动机性能的影响。 

英文摘要:

      Quasi-two-dimensional method for the computation of the dual-mode scramjet flow path was developed by introducing one-dimensional method for completed combustion to the two-dimensional N-S equation. The influences to the scramjet performance by shock and boundary layer separation were handled by this method.In addition,the thrust and impulse as well as the parameter variations along the axis direction of the scramjet were given in acceptable time. Validated by the computation of a freejet scramjet engine, the effects of different positions of fuel injection and flowpath on the engine performance were analyzed.