整流支板和火焰稳定器的一体化设计及性能分析

Integration design and performance analysis of frame plate and flame holder

一体化加力燃烧室设计是将涡轮后框架整流支板、火焰稳定器以及燃油喷射装置进行集成设计,是未来加力燃烧室研究探索的主要方向之一。目前,国内外对于整流支板稳定器形状的研究较少,特别是在带偏转角的低压涡轮来流气体下会造成较大的流动损失。根据主燃烧室涡轮后缘角的气流来流角度设计支板前缘角,根据来流速度设计支板后缘角,是一种新型的一体化加力燃烧室整流支板的设计方案。模拟计算结果显示:(1)所有计算模型的冷态总压恢复系数均在97.6%以上,且新型整流支板与传统对称型整流支板相比具有更低的流动损失,最大相差1.21%;(2)随着入口气流速度的增大,为得到较高总压恢复系数,新型整流支板模型后缘角的设计值也应随之增大;(3)在加力状态下,新型整流支板模型装配的一体化加力燃烧室燃烧效率约为85.6%。

The integrated afterburner design is to integrate the turbine rear frame plate,the flame holder and the fuel injection device.It is one of the main research directions of afterburner in the future.At present,there are few researches at home and abroad about the effect of the shape of the frame plate stabilizer on air flow improvement in the poor inlet working conditions,which will cause a large flow loss in the presence of incoming gas from the low-pressure turbine with a deflection angle.In this study,the leading angle of the plate is designed according to the angle of the air flow behind the turbine,and the trailing edge angle of the plate is designed according to the velocity of inlet air,presenting a new scheme for the design of the integrated afterburner frame plate.The simulation calculation results show that:(1)The total pressure recovery coefficient of all calculation models is above 97.6%;compared with the traditional symmetrical plate,the new type has lower flow loss,and the maximum difference is 1.21%;(2)With the increase of inlet air velocity,the design value of the trailing edge angle of the new type plate should also increase to obtain a higher total pressure recovery coefficient;(3)In the afterburner state,the combustion efficiency of the integrated afterburner is about 85.6%.