温度畸变氢燃气发生器的燃烧及热扩散特性数值研究  

Numerical Study on Combustion and Thermal Diffusion Characteristics of Temperature Distortion Hydrogen Gas Generator

作　　者：李小龙 陈鹏飞 杨华 陈伟 LI Xiaolong;CHEN Pengfei;YANG Hua;CHEN Wei(School of Aeronautics and Astronautics,Sichuan University,Chengdu,China,610065;Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Mianyang,China,621703)

机构地区：[1]四川大学空天科学与工程学院,四川成都610065 [2]中国航发四川燃气涡轮研究院,四川绵阳621703

出　　处：《热能动力工程》2025年第2期32-42,共11页Journal of Engineering for Thermal Energy and Power

基　　金：高超声速气膜冷却的热结构耦合特性及强度评定方法研究项目(20220009019001)。

摘　　要：针对航空发动机进气温度畸变评定试验需求,采用数值计算方法对某型航空发动机温度畸变氢燃气发生器开展研究。分析了氢燃气发生器在不同扇区和不同当量比供氢条件下的火焰传播特性及热扩散规律。结果表明:长、短燃烧器支杆间隔排布的氢燃气发生器构型能最优化管道内的燃烧分布,且氢燃气发生器的燃烧和热扩散规律由火焰传播特性决定;部分扇区供入燃料时,高温区主要分布在相对应的扇区附近,且当量比为0.1时,高温区向外扩散角度一定,约为20°;供氢扇区角度增大,对应扇区出口温度不均匀度增高,但整环出口温度不均匀度在180°扇区喷氢时最大;随着当量比增大,高温燃气扩散范围增加,发生温度畸变的范围增大了1.5倍,同时出口温度不均匀度和空间压力畸变也逐渐增大。In response to the experimental requirements for the assessment of intake temperature distortion in aero-engines,a numerical computation method was employed to investigate a certain type of hydrogen gas generator used in aero-engines with temperature distortion.This paper analyzed the flame propagation characteristics and thermal diffusion patterns of the hydrogen gas generator under different hydrogen supply conditions in various sectors and at different equivalence ratios.The results indicate that a hydrogen gas generator configuration with long and short burner struts arranged alternately optimizes the combustion distribution within the duct.Moreover,the combustion and heat diffusion patterns of the hydrogen gas generator are determined by the characteristics of flame propagation.When fuel is supplied to partial sectors,high-temperature zones are primarily localized near the corresponding sectors,and at a equivalence ratio of 0.1,the high-temperature zone diffuses outward at a fixed angle of approximately 20°.As the sector angle for hydrogen supply increases,the corresponding sector temperature non-uniformity at the outlet also increases,but the overall temperature non-uniformity at the outlet is greatest when hydrogen is sprayed in a 180°sector.With an increase in the equivalence ratio,the range of high-temperature gas diffusion increases,and the area affected by temperature distortion expands by 1.5 times.Concurrently,the temperature non-uniformity at the outlet and the spatial pressure distortion also gradually increase.

关 键 词：温度畸变 氢燃气发生器 当量比 热扩散 扇区 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]