Design Optimization of Outlet Temperature Distribution of Hydrogen Micromixing Diffusion Combustor Based on Micro-turbojet Engine Engine  

基于微型涡喷发动机的氢气微混扩散燃烧室出口温度场优化设计

作　　者：Da Mo Yu-zhen Lin Xiao Han Feng-ming Wang Zhi-dong Ma 莫妲;林宇震;韩啸;王奉明;马志东

机构地区：[1]AECC Shenyang Engine Research Institute [2]Research Institute of Aero-Engine,Beihang University [3]Aero Engine Academy of China

出　　处：《风机技术》2024年第5期34-38,共5页Chinese Journal of Turbomachinery

基　　金：Advanced Jet Propulsion Innovation Center,AEAC(Project ID.HKCX2021-01-021);The Fundamental Research Funds for the Central Universities(Project ID.501XTCX2023146001);Science Center for Gas Turbine Project(P2022-A-II-006-001)。

摘　　要：This paper focuses on the optimization of the outlet temperature field of a hydrogen micromixing diffusion combustor for a micro-turbojet engine with a thrust of 20kgf.The joint simulation optimization platform was established combiningWorkbench and UG and the multi-parameter driven optimization design process was developed.The surrogate models and genetic algorithms were employed to investigate the influences of key parameters on the hotspot temperature at the combustor exit.It was found that smaller diameters of the dilution holes and positions further from the exit lead to lower hotspot temperatures.Additionally,an optimal solution for achieving a uniform temperature distribution at the combustor outlet was obtained.This solution involves a single row of dilution holes on both the inner and outer walls of the flame tube,arranged in an alternating axial and angular pattern.Through aerothermal process analysis,it was determined that the outlet temperature distribution coefficient(OTDF)of the combustion chamber is below 0.2.Meanwhile,the axial dimension of the flame is short,approximately one-third of the flame tube length.The conclusions derived from this study provide important guidance for the design of hydrogen micromix diffusion combustor.

关 键 词：MicromixCombustion HYDROGEN Optimization OutletTemperature FlowField 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]