壁面に衝突する旋回噴流 : 流体工学,流体機械  [in Japanese] Swirling Jet Impinging on a Solid Surface  [in Japanese]

The swirling jet which impinged on the solid surface was investigated experimentally. The flow visualization was done using smoke-wire method, and the flow near the impingement region was clarified. The measurement of three components of mean velocity and fluctuation velocity was made by rotating probe technique by inclined hot-wire. Each distribution of mean velocity, Reynolds stress ; and wall pressure was illustrated, and the jet characteristics was examined. The experimental result was compared with existing result of the swirling jet which gushes in still air out or existing result of the jet without swirl which impinges on solid surface, and effect of impinging surface on the jet and effect of the intensity of swirl were examined.