Improvement of Investigation technique of Tornado-like Swirling Upwind by Experiment and CFD

研制了多扇多叶片的类龙卷风流动模拟器，利用PIV方法研究了入口流动条件对类龙卷风逆风旋流特性的影响。另一方面，开发了模拟龙卷风流动的CFD技术。CFD分析结果表明，叶片周围流动存在分离现象，流动控制不完全。该结果明确了仿真器的改进方向。

Tornado-like flow simulator with multi-fan and multi-vane was developed to investigate effects of inlet flow condition on characteristics of tornado-like swirling upwind by PIV method. On the other hand, CFD technique, which can reproduce the flow in the tornado-like flow simulator, was developed. The results of this CFD analysis indicated that the flow around vanes is separating and the control of flow is incomplete. The improvement direction of the simulator was clarified by this result.