后钝体开口先进旋涡燃烧室燃烧特性的数值研究

Numerical Analysis of Combustion Characteristics in AVC with a Slot in the Rear Blunt Body

对不同燃烧条件下后钝体开口先进旋涡燃烧室(AVC)的燃烧性能进行了数值模拟,结果表明,后钝体开口AVC在各工况下都能实现稳定燃烧。随着来流速度的增大,总压损失增大,燃烧效率减小,凹腔内高温分布区域增大且分布更加均匀。随着来流温度的提高,总压损失先减小后保持不变,燃烧效率增大。随着壁面温度的提高,凹腔内温度升高且分布更加均匀,总压损失增大,燃烧效率减小。随着燃气当量比的增大,总压损失先增大后减小,燃烧效率减小。

The effect of different combustion conditions on combustion characteristics of （ AVC） with a slot in rear blunt body was numeri-cally calculated. The results show that it can achieve stable combustion with different conditions. As incoming velocity increases, the total pressure loss increases, the combustion efficiency reduces, the temperature in cavity increases and the temperature distribution in cavity becomes more uniform. With the increase of incoming temperature, the total pressure loss firstly reduces then remains constant, the com-bustion efficiency increases. As wall temperature increases, the temperature in cavity increases and the temperature distribution in cavity becomes more uniform, the total pressure loss increases, the combustion efficiency reduces. As equivalent ratio increases, the total pres-sure loss firstly increases then reduces, the combustion efficiency reduces.