摘要
应用计算流体力学(CFD)方法,对脉冲爆震波与涡轮叶片相互作用进行了初步数值模拟.以化学恰当比氢气空气混合物为反应物,仅考虑爆震波对涡轮静止叶片的作用.模拟结果表明:爆震波在通过涡轮叶片后,峰值压力发生衰减,并产生一向上游传播的激波,这有利于缓解爆震波对叶片的脉动冲击作用,但同时在涡轮叶片前缘会产生高压区,使叶片承受的应力很大.在爆震管出口压力变化图中可以看到由于激波经过叶片前缘和爆震室前端壁不断反射形成的多对不断衰减的双波峰.
This paper conducted preliminary numerical simulation of their interactions by means of CFD method. The stoichiometric hydrogen-air mixture was employed as reactants and 1-step finite rate reaction model was used to investigate the interaction of detonation wave with a stationary blade. The simulation results indicate that the detonation wave atten uates after passing the blade passage, and generates a strong compression wave reflecting back upstream from leading edge of blade at the same time, This mitigates the pulse effect on turbine blade and causes a short period of back mass flow at turbine inlet surface. A high pressure environment is formed at the leading edge,The pressure time sequences at pulse detonation engine（PDE） exit surface shows many pairs double-peaks are gradually attenuated.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2009年第1期60-64,共5页
Journal of Aerospace Power
基金
国家自然科学基金(50336030)
关键词
脉冲爆震发动机
数值模拟
涡轮叶片
双波峰
pulse detonation engine （PDE）
numerical simulation
turbine blade
double-peaks
