【摘要】 以汽油为燃料,空气为氧化剂,在内径为56mm的脉冲爆震发动机模型内成功地产生了充分发展的爆震。测试了在同一余气系数α、不同填充系数β下的爆震波压力,并对其变化进行了分析。分析实验结果发现,在同一余气系数下,爆震室长度一定时,随着填充系数的减小,爆震波压力降低,使脉冲爆震发动机模型性能下降。当填充系数小于临界填充系数βci时,爆震室内的燃烧方式为爆燃,而不能形成爆震。更多还原

【Abstract】 Fully developed CJ detonation waves are produced successfully by PDE(pulse detonation engine) model with its diameter 56 mm using gasoline as fuel and air as oxidizer.Under same excess coefficient α,and various filling coefficients β,the detonation pressures are measured,and the factors influencing detonation pressures are analyzed.The experimental results have shown that for a given length of PDE model detonation wave pressures decrease and the performance of PDE model become worse with falling of filling coefficients ratio under the same excess coefficient. While filling coefficients are less than critical filling coefficient βcr,deflagration rather than detonation is developed in the detonation chamber.更多还原