折流燃烧室两相喷雾燃烧流场数值模拟

Numerical investigations of two-phase spray combustion flow fields in slinger annular combustor

在任意曲线坐标系下对折流燃烧室两相喷雾燃烧流场进行数值模拟,采用偏微分方程法生成三维贴体网格,采用k-ε双方程模型模拟湍流黏性,分别采用EBU(eddy break-up)-Arrhenius燃烧模型、EDC(eddy dissipation concept)燃烧模型以及二阶矩(second-order-moment,简称SOM)燃烧模型模拟化学反应速率,在非交错网格下,采用欧拉-拉格朗日方法模拟气液两相喷雾燃烧过程,气液之间相互耦合采用PSIC(par-ticle-source-in-cell)算法求解.数值分析不同湍流燃烧模型对折流燃烧室两相喷雾燃烧流场的影响,计算结果与试验数据比较,表明采用不同湍流燃烧模型所得的两相喷雾燃烧流场有所不同,其中SOM燃烧模型和EBU燃烧模型都能较好地数值模拟折流燃烧室两相喷雾燃烧过程.

In arbitrary curvilinear coordinates,numerical investigations of three-dimensional two-phase spray combustion flow fields for a slinger annular combustor were carried out.Three-dimensional body-fitted grids were generated by TTM（Thompson-Thames-Martin） method,k-ε model was used to simulate the turbulent viscosity;EBU（eddy break-up）-Arrhenius combustion model,EDC（eddy dissipation concept） combustion model and SOM（second-order-moment） combustion model were applied to predict turbulent combustion rate.The gas and liquid phases were treated with Eulerian-Lagrangian method and the gas-liquid coupling was calculated with PSIC（particle-source-in-cell） arithmetic.The effects of different combustion models on two-phase spray combustion flow fields were studied.The numerical results are in good agreement with the experimental data.It shows that all of the combustion models are used to simulate the combustion process in slinger annular combustor,but the SOM combustion model and EBU combustion model are better than EDC combustion model for simulation of two-phase spray combustion flow fields in the slinger annular combustor.