NUMERICAL PREDICTION OF TURBULENT MIXING IN A VARIABLE-DENSITY SWIRLING PIPE-FLOW

被引:6
作者
HIRAI, S
TAKAGI, T
机构
[1] Department of Mechanical Engineering, Faculty of Engineering, Osaka University, Suita, Osaka
关键词
D O I
10.1016/0017-9310(91)90083-Q
中图分类号
O414.1 [热力学];
学科分类号
摘要
Numerical predictions are compared with experiments on turbulent mixing in variable density swirling flows, where He or CO2 is coaxially injected in turbulent swirling air flows in a pipe. The calculation employs two kinds of stress/flux equation model, i.e. the density-weighted Favre-averaged form and the density-unweighted conventional-averaged form. The calculation based on the former model can predict the phenomenon that the mixing of He is strongly retarded due to swirl than that of CO2, whereas the latter model fails to predict this. Comprehensible interpretations of the interrelation between turbulent mixing, density non-homogeneity and swirl-induced pressure gradient are presented.
引用
收藏
页码:3143 / 3150
页数:8
相关论文
共 17 条
[1]  
BILGER RW, 1989, ANNU REV FLUID MECH, V21, P101
[2]   TRANSPORT EQUATIONS IN TURBULENCE [J].
DALY, BJ ;
HARLOW, FH .
PHYSICS OF FLUIDS, 1970, 13 (11) :2634-&
[3]  
DIBBLE RW, 1986, 21ST S INT COMB PITT, P1329
[4]   PREDICTIONS OF THE LAMINARIZATION PHENOMENA IN AN AXIALLY ROTATING PIPE-FLOW [J].
HIRAI, S ;
TAKAGI, T ;
MATSUMOTO, M .
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 1988, 110 (04) :424-430
[5]   NUMERICAL PREDICTION OF FLOW CHARACTERISTICS AND RETARDATION OF MIXING IN A TURBULENT SWIRLING FLOW [J].
HIRAI, S ;
TAKAGI, T ;
HIGASHIYA, T .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1989, 32 (01) :121-130
[6]  
JANICKA J, 1986, 21 S INT COMB COMB I, P1409
[7]   CALCULATION METHODS FOR REACTING TURBULENT FLOWS - A REVIEW [J].
JONES, WP ;
WHITELAW, JH .
COMBUSTION AND FLAME, 1982, 48 (01) :1-26
[8]  
JONES WP, 1980, PREDICTION METHODS T, P379
[9]  
Launder B. E., 1976, Turbulence, P232
[10]   PROGRESS IN DEVELOPMENT OF A REYNOLDS-STRESS TURBULENCE CLOSURE [J].
LAUNDER, BE ;
REECE, GJ ;
RODI, W .
JOURNAL OF FLUID MECHANICS, 1975, 68 (APR15) :537-566