离心力场对内燃波转子火焰传播特性的影响

Effects of Centrifugal Force on Flame Propagation Characteristics of Wave Rotor Combustor

关键词:  内燃波转子  离心力  火焰传播  冒泡速度  火焰锋面

Key words:  Wave rotor combustor  Centrifugal force  Flame propagation  Bubble speed  Flame front

摘要:

为了揭示离心力对内燃波转子火焰传播特性的影响，建立了内燃波转子燃烧过程的简化模型，数值模拟了不同离心力场强度下波转子通道内的燃烧过程。研究结果表明，离心力只在一定范围内对火焰传播起到加速作用，且这种影响与预混气当量油气比Φ有关，当Φ=1.0时，作用范围为［0～250g］，在Φ=0.6，0.8时，作用范围为［0～700g］；离心力场对内燃波转子火焰传播特性的影响机制是导致火焰锋面变形，进而引起火焰传播速度变化。

Abstract:

In order to reveal the effects of centrifugal force on the flame propagation characteristics of wave rotor combustor， a simplified model of the combustion process of wave rotor combustor is established， and the combustion process in the rotor passage with different centrifugal force field intensity is numerically simulated. The results show that the centrifugal force can accelerate the flame propagation only in a certain range， and the certain range is related to the equivalent ratio Φ of premixture. Concretely，when Φ=1.0，the certain range is 0～250g. And when Φ is 0.6 or 0.8， the certain range is 0～700g. The influence mechanism of centrifugal force on the flame propagation characteristics of wave rotor combustor is that the centrifugal force caused the deformation of flame front and then variation of the flame propagation velocity.