Numerical simulation on flow characteristics of round Rayleigh step cavity

作者：Shen Feng^*; Liu Zhao Miao

来源：Journal of China University of Mining & Technology, 2011, 40(5): 781-786+803.

• Axisymmetric jet
• Calculation models
• Computational fluid dynamics methods
• Film flows
• Flow characteristic
• Hydrostatic lift
• Inlet velocity
• Load capacity
• Number and size
• On flow
• Parallel disks
• Rayleigh-step
• Vortex
• Wall pressure

In order to reveal the effect of flow characteristics on the load capacity of oil cavity, the flow of round Rayleigh step cavity in hydrostatic lift was divided into three regions: the axisymmetric jet impinging flow, radial source flow and film flow. The computational fluid dynamics (CFD) method was used to build a calculation model and the influences of geometry (e, h) parameters and the Reynolds number on the vortices were simulated. The results show that there are complex vortices in the flow field of the round Rayleigh step cavity, of which the pressure is higher than parallel disks flow. The number of vortices is different from 1 to 4 with the Reynolds number of 200<Re<2 250. The number and size of vortices are increased, and location is changed with the increasing of h(0.05-0.20 mm) and e(0.5-4.0). The inlet velocity significantly affects the vortices structure and the distributions of wall pressure and velocity are uneven.

• 出版日期2011
• 单位北京大学