不同燃油分配的一体化加力燃烧室性能对比

Comparison of Integrated Afterburner Performance for Different Fuel Distribution

关键词:  航空发动机  加力燃烧室  一体化设计  出口温度  燃烧效率  燃油分配

Key words:  Aeroengine  Afterburner  Integrated design  Outlet temperature  Combustion efficiency  Fuel distribution

摘要:

针对某型发动机一体化加力燃烧室模型试验件，进行了两种燃油分配方案在不同余气系数下的加力燃烧室性能试验研究。研究结果表明：加力燃烧室出口温度随着余气系数的减小而升高，当余气系数α<1.70时，燃油分配方案2的加力燃烧室出口温度高于燃油分配方案1，并且高温区分布更广。随着余气系数的减小，燃烧效率先增加后减小，试验中燃油分配方案2获得的燃烧效率最大值为96.7%，燃油分配方案1的燃烧效率低于90%。研究证明了燃油分配方案2的等氧含量法燃油分配设计能够有效提升加力燃烧室性能。

Abstract:

Experiments were conducted to study the afterburner performance of integrated afterburner model with two fuel distribution schemes under different excess air coefficients. The results show that with the decrease of the excess air coefficient， the outlet temperature of the integrated afterburner rises， when the excess air coefficient is less than the 1.70，the outlet temperature of integrated afterburner with the case 2 of the fuel distribution is higher than in case 1， meanwhile the distribute zone of high temperature is more widely. With the decrease of the excess air coefficient， the integrated afterburner efficiency increases first and then decreases， the maximum afterburner efficiency of the fuel distribution in case 2 obtained from experiment is 96.7%， the efficiency of the fuel distribution in case 1 is less than 90%. The results prove that the layout design of the fuel distribution by the oxygen content method in case 2 can effectively improve the performance of the integrated afterburner.