扣焓火焰面模型在喷雾燃烧模拟中的应用  

Application of Enthalpy Deficit Flamelet Model in Spray Combustion Simulation

作　　者：何俊奕 李峰 胡群 王利坡[1] HE Junyi;LI Feng;HU Qun;WANG Lipo(UM-SJTU Joint Institute,Shanghai Jiao Tong University,Shanghai 200240,P.R.China;Beijing Power Machinery Research Institute,Beijing 100074,P.R.China)

机构地区：[1]上海交通大学密西根学院,上海200240 [2]北京动力机械研究所,北京100074

出　　处：《应用数学和力学》2023年第9期1017-1030,共14页Applied Mathematics and Mechanics

摘　　要：基于OpenFOAM的求解器,使用大涡模拟结合纯气相火焰面生成流形方法进行了喷雾燃烧模拟,并采用简单的扣焓处理来考虑蒸发热损失.该求解器首先借助悉尼乙醇喷雾火焰标模EtF7进行了验证.预测的气相平均温度和液滴统计数据与实验数据吻合良好,精度与喷雾火焰面模型接近.湍流-化学反应相互作用建模处理可能对模拟精度有更大影响.然后,对一个真实的航空发动机折流燃烧室进行了两组工况的数值模拟.仿真结果合理展现了两种工况下喷雾火焰燃烧的不同特征,并且预测的总压损失值接近于测量值.An OpenFOAM⁃based solver for spray combustion simulation with the large eddy simulation(LES)and the flamelet generated manifold(FGM)method,was developed.A simple reduction of the temperature was employed to account for the evaporative heat loss.The solver was firstly validated against the Sydney pilo⁃ted ethanol spray flame benchmark EtF7.The predicted mean gas temperature and droplet statistics correspond well with the experimental data and have similar accuracy to the spray flamelet model.The turbulence⁃chemis⁃try interaction modeling may have a larger influence on the simulation accuracy.Then a realistic gas turbine slinger combustor was simulated with 2 sets of operating conditions.The simulation results reveal different flame characteristics of the 2 working conditions.The predicted total pressure losses are close to the measured values.

关 键 词：喷雾燃烧 大涡模拟 火焰面生成流形 航空发动机折流燃烧室 

分 类 号：O357.41[理学—流体力学]