摘要
以汽油为燃料,空气为氧化剂,在内径为60mm的吸气式脉冲爆震发动机上进行了反压传播规律实验研究。测量了10～30Hz频率范围内进气道内的反传压力。实验结果表明,进气道内的反压峰值随着工作频率的增加而增加,两者基本呈线性关系。随着工作频率的增加,压力波动的时间占每个工作循环时间的比例增加。压力脉动比在20Hz时达到最大。建立了数值模型,采用小能量点火及温度梯度自适应方法,计算得到了反压的形成及传播特性。计算结果印证了反压是由于回传爆震引起的。将计算结果与实验结果进行了比较,结果表明两者符合地较好。
With gasoline as fuel and air as oxidizer,experiments were performed to investigate the propagation of back-pressure in an air-breathing pulse detonation engine（PDE） with inner diameter 60mm.The back-pressure was measured at different operation frequencies ranging from 10 Hz to 30 Hz.The experimental results show that the back-pressure approximately increases linearly with increasing frequency.The ratio that the time of pressure fluctuation to a cycle time increases with increasing frequency.The pressure oscillation has a maximum value with operation frequency of 20Hz.The numerical model was developed and the characteristic of formation and propagation of the back-pressure was numerically investigated.The simulation results confirm that the back-pressure is induced by the retonation wave.The experimental and numerical results agree well,indicating that the method of simulation can reasonably reflect the propagation process of back-pressure.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2013年第3期428-432,共5页
Journal of Propulsion Technology
基金
国家自然科学基金项目(51176158)
陕西省自然科学基金资助项目(S2010JC3660)
高等学校博士学科点专项科研基金新教师类资助项目(20116102120027)
关键词
爆震
发动机
反压
实验
数值模拟
Detonation
Engine
Back-pressure
Experiment
Numerical simulation
