模拟火箭引射混合特性的实验研究

专门设计了可用于研究箭基组合循环发动机(RBCC)在起动阶段(Ma=0)所使用的引射火箭性能的实验装置. 作为初步试验，研究了不同工况的引射热喷流(一次流)和被引射空气(二次流)之间混合的演变、发展过程，找出不同来流条件下影响引射性能的主要参数，为最终探明引射火箭的最佳工作条件打下基础，同时根据试验结果提出了促进一、二次流混合的可行方案，便于下一步深入研究.

THE EXPERIMENTAL STUDY OF INJECTION AND MIXING OF THE MODEL EJECTOR ROCKET

The specific apparatus has been designed for the experimental study of RBCC (Rocket Based Combine Cycle) engines. The ejector rocket was modeled by a hot primary jet that was generated by gas hydrogen/air burning. The injected air entered the test section through a designed channel from at-mosphere in order to simulate the flow around the engine at taking off condition (flight Mach number is 0). The object of the present study is to investigate the mixing progress. By selecting the primary jet with different pressure and temperature, the char-acteristics of the ejection and mixing are studied to explore the dominant parameters. Based on this fundamental study, further researches will be car-ried out to improve mixing and finally to reveal the principles for optimal ejector rocket.