超音速气流中氢燃料强化混合的燃烧实验研究

AN EXPERIMENTAL STUDY ON COMBUSTION IN SVPERSONIC FLOW WITH ENHANCED MIXING OF HYDROGEN FUEL

关键词:  超音速燃烧  氢燃料  燃料喷射  燃烧试验

Key words:  Supersonic combustion  Hydrogen fuel  Fuel injection  Combustion test

摘要:

扼要介绍了在超音速气流中，采用后掠斜坡、多级喷射、振荡激波技术强化混合的氢燃料喷嘴，进行自点火和燃烧的实验概况。以实验模型结合喷射方式特点，分析了强化机理。实验表明，多级喷射的燃烧效率高，扩张型后掠斜坡喷嘴的抗干扰能力强，总压损失低，液体喷射产生的振荡激波能加强混合，提高燃烧效率。

Abstract:

An experimental study on autoignition and combustion of hydrogen in supersonicairstrgm, by technique of enhanced mixing injectors with swept ramp, multi--injection and oscillatingshocks, is briefly introducted in this paper. Combined the experimental model with the injection patterns the mechanism of enhanced mixing is analysed. The results indicate that higher combustion efficiency is obtained with multiple injection with expansing ramp injectors, but better anti-interaction ability and lower total pressure loss with the latter. It is also shown that the oscillating shocks generated by liquid injection will enhance mixing and increase combustion efficiency.