小型航空发动机燃烧室热辐射环境数值模拟  

Numerical simulation on thermal radiation enviroment of a small aeroengine combustion chamber

作　　者：刘晗[1] 刘跃凡 

机构地区：[1]哈尔滨工业大学能源学院,黑龙江哈尔滨150001 [2]哈尔滨第六中学,黑龙江哈尔滨150036

出　　处：《应用科技》2016年第1期72-75,共4页Applied Science and Technology

基　　金：国家自然科学基金资助项目(51176039)

摘　　要：发动机燃烧室中高温气体和粒子对内壁面的辐射传热占总传热量很大一部分,对发光火焰来说能够达到总传热量的80%,有关资料表明发动机燃烧室内气体和炭黑辐射热流能达到2.3×10~5W/m^2,所以在先进航空发动机燃烧室的设计中需要可靠的数值仿真支持。文拟对某小型航空发动机燃烧室结构进行适当简化,并利用商业软件FLUENT数值仿真方法计算其典型工况下燃烧室内温度、组分浓度场以及壁面热流,对计算结果进行对比分析,结果表明在发动机燃烧室中考虑燃气的辐射效应使得燃烧室内最高温度降低了5%以上,使得流场的温度梯度降低,对其他各物理量的分布也具有重要的作用。The radiative heat transfer of high temperature gas and particles to the inner wall in the engine combustion chamber account for a large part of the total heat transfer,and it can reach 80% of the total heat transfer for luminous flame. Relevant data show that the engine combustion chamber gas and carbon black thermal radiation can achieve 2. 3 × 10^5 W/m^2. The reliable numerical simulations should be very important in aeroengine combustion chamber design. In this article,a small aviation combustion chamber structure was simplified,and the commercial software FLUENT was used to simulate and obtain the concentration field,temperature field,and wall heat flux under a typical condition. By analyzing the results,it shows that the radiative heat transfer lowers more than 5% of the highest temperature inside the engine combustion chamber,reducing the temperature gradient of flow field. It also has important role in the distribution of other physical quantity.

关 键 词：航空发动机 燃烧室 热辐射环境 温度场 数值模拟 

分 类 号：TK123[动力工程及工程热物理—工程热物理]