HU Ya-ping, JI Hong-hu, BAI Tao-tao. Effect of turbulence models on numerical simulation of flow and infrared radiation characteristic of aero-engine exhaust system[J]. 2012, 27(11).
HU Ya-ping, JI Hong-hu, BAI Tao-tao. Effect of turbulence models on numerical simulation of flow and infrared radiation characteristic of aero-engine exhaust system[J]. 2012, 27(11).DOI:
The flow field and infrared radiation (IR) characteristics of an aero-engine exhaust system were simulated with three turbulence models
including k-ω shear-stress transport (SST) model
renormalization group (RNG) k-ε model with standard wall functions and RNG k-ε model with enhanced wall functions.The results show that among the three methods
the static pressures are nearly the same
but the distributions of temperature
species and IR are different.The temperature of gas and the inner wall of inner duct
the mass concentration of species and IR are the greatest when RNG k-ε model with enhanced wall functions is used;those are the second when RNG k-ε model with standard wall functions is used
and the results of k-ω SST model are minimal.The comparison of experimental data and those of computation shows that the IR results of k-ω SST model are more reasonable.