Effect of Annular Slit Geometry on Characteristics of Spiral Jet  

作　　者：Shigeru Matsuo Kwon-Hee Lee Shinsuke Oda Toshiaki Setoguchi Heuy-Dong Kim 

机构地区：[1]Department of Mechanical Engineering, Saga University, 1, Honjo-machi, Saga-shi, Saga 840-8502,Japan [2]School of Mechanical Engineering, College of Natural Science, Andong National University,388, Song-Cheon Dong, Andong, Kyung-Pook, Korea

出　　处：《Journal of Thermal Science》2003年第3期225-230,共6页热科学学报(英文版)

摘　　要：A spiral flow using an annular slit connected to a conical cylinder does not need special device to generate a tangential velocity component of the flow and differs from swirling flows. Pressurized fluid is supplied to an annular chamber and injected into the convergent nozzle through the annular slit. The annular jet develops into the spiral flow. In the present study, a spiral jet discharged out of nozzle exit was obtained by using a convergent nozzle and an annular slit set in nozzle inlet, and the effect of annular slit geometry on characteristics of the spiral jet was investigated by using a Laser Doppler Velocimeter (LDV) experimentally. Furthermore, velocity distributions of the spiral jet were compared with those of a normal jet.A spiral flow using an annular slit connected to a conical cylinder does not need special device to generate a tangential velocity component of the flow and differs from swirling flows. Pressurized fluid is supplied to an annular chamber and injected into the convergent nozzle through the annular slit. The annular jet develops into the spiral flow. In the present study, a spiral jet discharged out of nozzle exit was obtained by using a convergent nozzle and an annular slit set in nozzle inlet, and the effect of annular slit geometry on characteristics of the spiral jet was investigated by using a Laser Doppler Velocimeter (LDV) experimentally. Furthermore, velocity distributions of the spiral jet were compared with those of a normal jet.

关 键 词：spiral jet flow convergent nozzle annular slit LDV 

分 类 号：TB126[理学—工程力学]