超燃冲压发动机燃烧室内对流与辐射加热基于OpenFOAM的数值模拟  

Numerical Simulation of Convection and Radiation Heating in Scramjet Based on OpenFOAM

作　　者：孙维佳 钟伟 王平阳[1] 蔡健 Micheal.F.MODEST SUN Weijia;ZHONG Wei;WANG Pingyang;CAI Jian;Micheal.F.MODEST(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Institute of Aerospace System Engineering,Shanghai 201109,China;Department of Mechanical Engineering,University of Wyoming,Laramie,WY 82071,USA;School of Engineering,University of California,Merced,CA 95344,USA)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]上海宇航系统工程研究所,上海201109 [3]怀俄明大学机械学院,怀俄明州82071 [4]加利福尼亚大学默塞德分校工学院,加利福尼亚州95344

出　　处：《上海航天》2018年第1期117-123,共7页Aerospace Shanghai

摘　　要：为了考察对流和辐射传热对燃烧和流场以及壁面热流密度的影响,基于OpenFOAM平台,采用基于k-ω湍流模型的剪切应力输运(SST)模型,结合二维P1模型、随机欧拉解(SEF)法及k-distribution谱带模型计算燃烧室内燃烧、流动、燃气辐射和壁面对流及辐射热流密度。计算分为燃烧/流动与辐射解耦和耦合两种情况,前者的壁面辐射热流与文献解耦计算结果吻合较好,在此基础上考察耦合时热辐射对燃烧和流场参数及壁面热流的影响。结果表明:解耦条件下壁面最大辐射热流密度达55 W/cm^2,辐射与对流热流密度之比达40%以上,但位置与最大辐射热流位置不一定相同,燃气最高温度与不考虑辐射时相比降低120K左右;在耦合计算中,燃气最高温降低近200K,燃气高温区面积增大而平均温度降幅较小。In order to investigate the influence of convective and radiative heat transfer on combustion,flow field and the wall heat flux density,the current work,based on OpenFOAM,employes a turbulent k-ωmodel based SST model,two-dimensional P1 model,a stochastic Eulerian fields(SEF)method and k-distribution spectral band model to calculate combustion,flow,the gas radiation and the wall convective/radiative heat flux density in combustion chamber.The calculation is divided into two cases:to decouple combustion/flow with radiation and to couple them.In the former cases,the wall radiative heat flux is consistent with the results in reference,and then the influence of heat radiation on combustion,flow field parameters and wall heat flux density in couple cases is explored.It is shown that,the maximum wall radiative heat flux density can reach 55 W/cm 2 in decouple cases,and the ratio of radiative and convective heat flux density can reach more than 40%,but the location may be different with that of maximum radiative heat flux density.Besides,the maximum gas temperature reduces about 120 K compared with cases without radiation;and the drop value reaches 200 K in couple cases,while the high temperature area increases with small average temperature drop.

关 键 词：超声速流动 燃烧 热辐射 OPENFOAM 超燃冲压发动机 

分 类 号：V235.211[航空宇航科学与技术—航空宇航推进理论与工程]