Simulation of pressure field under centrifugal acceleration based on FLUENT

LU Shusheng, SHEN Runjie, HE Wen, XV Guanhua
（Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China）

Abstract: Considering that centrifugal acceleration will cause the uneven distribution of pressure field in the combined multiparameter test environmental system, a scheme that adding fan stirring to improve the evenness of pressure field was presented. After the coupling mechanism between centrifugal acceleration and pressure field was studied, a fluid flow model of the environmental chamber was established on the basis of fluid motion equation and standard k~ε turbulence model. The distribution of pressure field was simulated in both cases of fan stirring and no fan stirring with the finite numerical analysis method, and the influence of fan stirring on the even distribution of pressure field was discussed. Research results show that without fan stirring centrifugal acceleration has a greater impact on the distribution of pressure field. On the contrary, the uniformity of pressure distribution will be effectively improved by using fan stirring. When the fan speed is low, the higher the fan speed, the more obviously the distribution of pressure field is improved. However, when the fan speed is high enough, the distribution of pressure field will not be much improved with the increase of the fan speed.
Key words: combined experiment; centrifugal acceleration; pressure field; degree of uniformity