对转式轴流风机内流的数值模拟

Numerical Simulation of Internal Flow of Contra-Rotating Axial Flow Fan

采用压力修正法 (SIMPLE法 )和混合 H- D格式 ,结合 K-ε湍流模型 ,求解加权平均 N- S方程 ,数值模拟了对转式轴流通风机内的流场 ,设计性能良好的对转风机有较好的流场 ,说明通过求解 N-

Certification testing of the performance of contra rotating axial flow fan is rather expensive and time consuming. In order to save expense and time, we propose simulation of its internal flow field. Our simulation has two points in common with others: (1) it employs Navier Stokes′s equations, SIMPLE method, and mixed H D scheme; (2) it requires appropriate boundary conditions. Unlike others, we deem it necessary to employ the rather difficult to handle K-ε turbulent model. Calculation results of our simulation for the internal flow field agree quite well with test data, preliminarily indicating that our proposed simulation of internal flow field is effective.