采用高速全流场显示技术和DPIV对空化水翼近壁处的空化云流动形态和运动机理进行了讨论.结果表明:绕Hydronautics翼型的空化云运动是一个准周期性过程:稳定空泡团初生在翼型前部,向翼型后部发展布满整个翼面,在翼型后缘出现汽泡团旋涡,伴随反向运动,最终向下游脱落.当前条件下空泡团旋涡脱落周期约为74 ms.空化区与主流区的交界面上存在较大的速度梯度,一组对涡出现在翼型尾部处交界面上.此外,采用以空泡为示踪粒子的DPIV能够对空化流动流速分布进行有效测量.
参考文献
| [1] | Knapp R T;Daily J W;Hammitt F G.Cavitation[M].New York:McGraw-Hill,1970 |
| [2] | Brennen C E.Cavitation and Bubble Dynamics[M].New York:Oxford University Press,1995 |
| [3] | Furness R A;Hutton S P .Experimental and Theoretical Studies on Two-Dimensional Fixed-Type Cavities[J].Journal of Fluids Engineering,Transactions of the ASME,1975,97(04):515-522. |
| [4] | Kubota A;Kato H;Yamauchi H et al.Unsteady Structure Measurement of Cloud Cavitation on a Foil Section Using Conditional Sampling Technique[J].Journal of Fluids Engineering,Transactions of the ASME,1989,111(02):204-210. |
| [5] | Gopalan S.;Katz J. .Flow structure and modeling issues in the closure region of attached cavitation[J].Physics of fluids,2000(4):895-911. |
| [6] | Guoyu Wang;Inanc Senocak;Wei Shyy .Dynamics of attached turbulent cavitating flows[J].Progress in aerospace sciences,2001(6):551-581. |
| [7] | 田晓东,陈嘉范,李云生,李玉梁.DPIV技术及其应用于潮汐流动表面流速的测量[J].清华大学学报（自然科学版）,1998(01):103-106. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%