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多喷管超声速引射器由于多股超声速一次流之间干扰严重会引入较大的能量损失,其启动压力较高且受引射器结构的影响较大,因此需要仔细考察其启动性能。采用三维雷诺平均方程RNG和k-ε双方程湍流模型,通过数值研究了引射喷管安装构型和引射管道型面对某矩形多喷管超声速引射器启动性能的影响。计算结果表明多喷管超声速引射器的结构对其启动性能影响较大,同时提出了适用于多喷管超声速引射器以提高其启动性能的结构。
Multi-nozzle supersonic ejector due to multi-strand supersonic flow between the serious interference will introduce greater energy loss, the starting pressure is higher and more affected by the structure of the ejector, so you need to carefully examine the start-up performance. The three-dimensional Reynolds average equation RNG and k-ε two-equation turbulence model were used to study the influence of the nozzle configuration and the performance of the launch pipe on the start-up performance of a rectangular multi-nozzle supersonic ejector. The calculation results show that the structure of multi-nozzle supersonic ejector has a great influence on its start-up performance, and a structure suitable for multi-nozzle supersonic ejector to improve its start-up performance is proposed.