Turbulent Taylor-Couette flow and its heat transfer characteristic based on PANS model
LIU Dong1*, DING Shicheng1, ZHOU Wenjie1, SUN Siliang1, KIM Hyoung Bum2
1. School of Energy and Power Engineering of Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Mechanical and Aerospace Engineering, Gyeongsang National University, Jinju 660701, Korea
Abstract：The flow field in the annulus of two coaxial cylinders is studied. The turbulent flow simulation method based on Partially-averaged Navier-Stokes method(PANS)is established by comparing various turbulent model results with the experimental results. The flow field distribution and heat transfer characteristics of slit model are analyzed in turbulent Taylor-Couette flow regime. The influences of Reynolds number and temperature gradient between inner and outer cylinders on the flow distribution and heat transfer characteristics were investigated. In addition, the formation of smaller vortices and the distributions of heat flux, velocity and wall shear stress in the slit region are analyzed. The results show that the axial motion of turbulent Taylor-Couette vortices appears aperiodical when the flow regime turn to turbulent Taylor-Couette flow. The axial sizes of Taylor vortices increase with the increase of Rey-nolds number and temperature gradient of inner and outer walls. The change of radial velocity and inner wall heat flux along the axial direction shows that the out jet caused by radial velocity has a direct influence on heat exchange between inner and outer walls.When the fluid in the annulus flow goes through the groove area, it impcts on the groove wall surface and forms vortices under the influence of inertia force, viscous force and wall shear force.The velocity in the groove area is consistent with the change of wall shear force, but the heat flux is opposite.
刘栋*,丁仕成,周文杰,孙思亮,金亨凡. 基于PANS模型的湍流Taylor-Couette流及其换热特性[J]. 排灌机械工程学报, 2019, 37(10): 889-894.
LIU Dong*, DING Shicheng, ZHOU Wenjie, SUN Siliang, KIM Hyoung Bum. Turbulent Taylor-Couette flow and its heat transfer characteristic based on PANS model. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(10): 889-894.
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