摘要
为了解单孔结构平板气膜的冷却特性,该文对不同吹风比条件下的流场(M=0.75,1.0,1.5)进行了数值模拟,计算域采用FNM(fullnon-matched)形式的蝶形结构化网格来模拟射流,计算格式采用了包括LU-SGS-GE(lower upper symmetric Gauss Seidel Gaussian Elimination method)隐式格式和改良型高精度、高分辨率的MUSCLTVD(monotone upstream-centred scheme for conservation laws,total-variation-dim inishing)格式的时间推进算法求解三维Navier-Stokes方程以及低Reynolds数双方程湍流模型。计算结果表明随着吹风比的不断增大,由于卷吸作用的增强,射流大部分脱离壁面与主流进行掺混使得气膜冷却效率不断降低,这与实验所得结果基本吻合。
The film cooling characteristics of a single hole on flat plate were studied numerically for various blowing ratios （M = 0. 75,1.0,1.5）. A fully non-matched structural mesh was used to simulate the cooling flow inside the jet hole. The LU-SGS-GE （lower upper symmetric Gauss Seidel Gaussian elimination method）implicit scheme and the high precision, high resolution MUSCL TVD （monotone upstream-centred scheme for conservation laws, total-variation-diminishing） scheme were used to solve the 3D Navier-Stokes equations with the q-turbulence model. The result compare well with the experimental data showing that the suction is strengthened as the blowing ratio increases and that the film cooling efficiency is reduced as the cooling jet lifts off the wall and mixs with the main flow.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第8期1331-1334,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(50676043)
国家"九七三"重点基础研究基金项目(2007CB210108)
关键词
气膜冷却
数值模拟
冷气射流
绝热效率
film cooling
numerical simulation
cooling jet flow
adiabatic efficiency
