摘要
应用不可压缩Navier-Stokes方程和RNGκ-ε湍流模型对空调用轴流风机的内部流动特性进行了数值模拟计算,并进行了相应的性能实验。讨论了两种叶轮匹配同一室外机时对内部流场的影响。研究结果表明,新设计的B叶轮的叶顶涡流区得到了明显的缩小,并且有外移的趋势,减小了涡流的存在而产生的对内流场的阻塞,内流状态得到了较大的改善;在设计工况点,B叶轮在气动性能基本保持不变的情况下降低了噪声。
The inner flow field of the axial flow fan used in the air - conditioner outdoor set is simulated numerically by solving three-dimensional Reynolds-averaged Navier-Stokes equations with the RNG κ-ε turbulent model, and the fan is measured experimentally. The influence on the inner flow field for two kinds of impeller matching the same outdoor set is discussed. The results have disclosed that the tip vortices flow region of the new designed impeller B is diminished obviously with an ontsourcing tenden- cy. The inner flow field blocking generated by the presence of eddy has been reduced so that the inner flow condition could be im- proved greatly. In the design operating point, the noise of the impeller B could be reduced without any negative influence on the aerodynamic performance of the fan.
出处
《流体机械》
CSCD
北大核心
2010年第12期5-8,72,共5页
Fluid Machinery
基金
广东省顺德区财政科技经费扶持项目资助(2007CXY006)
关键词
轴流风机
叶轮
流场模拟
性能预测
axial flow fan
impeller
flow field simulation
performance prediction
