Abstract：The interface between rotator and stator was defined as interior boundary in hydraulic retarder which effectively solved the problem of inlet and outlet in the same plane for fluid flow. By using the time-averaged N - S equation and the standard k - ε turbulence model, the internal characteristics of flow with different blade number were simulated. Different velocity and pressure distributions of the hydraulic retarder with different blade numbers were obtained. The results show that, with the blade number increasing, the velocity firstly increases and then decreases in the interface, so does the degree of whirlpool. The meiobar area tends to increase. The static pressure in pressure side is distributed most uniformly with 36 blade number
严军, 何仁, 鲁明. 液力缓速器变叶片数的三维数值模拟[J]. 江苏大学学报（自然科学版）, 2009, 30(1): 27-31.
Yan Jun, He Ren, Lu Ming. Numerical simulation of hydraulic retarder with different blade number[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2009, 30(1): 27-31.
2009, Vol. 30 
