绕水翼非定常空化流场的实验研究

doi:10.3969/j.issn.1000-1093.2012.04.004

兵工学报 ›› 2012, Vol. 33 ›› Issue (4): 401-407.doi: 10.3969/j.issn.1000-1093.2012.04.004

绕水翼非定常空化流场的实验研究

黄彪₁，王国玉₁，王复峰₁，剧冬梅₂, 高德明₁

(1.北京理工大学机械与车辆学院, 北京 100081; 2.中国兵器科学研究院，北京 100089)

收稿日期:2010-08-29 修回日期:2010-08-29 上线日期:2014-03-04
作者简介:黄彪(1985—)，男，博士
基金资助:
国家自然科学基金项目（50979004）

Experrimental Study on Unsteady Cavitating Flow Around Hydrofoil With Particle ImagingVelocimetry System

HUANG Biao₁， WANG Guo-yu₁， WANG Fu-feng₁， JU Dong-mei₂, GAO De-ming₁

(1.School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China;2.Ordnance Science Institute of China, Beijing 100089, China)

Received:2010-08-29 Revised:2010-08-29 Online:2014-03-04

摘要/Abstract

摘要： 为了研究绕水翼非定常空化流动的流场特性，以Clark-Y型水翼为研究对象，采用粒子成像测速系统（PIV）对不同空化阶段，绕水翼空化流场的形态结构、速度场和涡量场等流动特性进行了实验观测。实验结果表明：绕水翼空化流场在发展过程中，随着空化数的降低而呈现不同的阶段型特征，主要表现为：空化数决定了非定常流场结构，随着空化数的降低，空化区域逐渐扩大，并出现了大尺度空泡团脱落的非稳定脉动特性；并且，由于空化流场结构的改变，速度分布表现出明显的特性差异，低速高频脉动区域随着空化数的降低而逐渐扩大，该区域的范围基本上对应于空化区域；在空化的各个阶段，涡量主要集中在翼型中、后部的漩涡分离区域内。当处于云状空化阶段时，水汽混合相的频繁转换使得翼型尾缘处的空化漩涡结构逐渐显现，涡量聚集区由最初的涡带转化为大涡量团的分散分布，而且影响区域明显扩大。

关键词: 流体力学, 水翼, 非定常空化, 数字粒子成像系统

Abstract: The unsteady cavitating flows around a Clark-Y hydromantic hydrofoil is studied by using particle imaging velocimetry (PIV) system. It is used to measure the cavity shapes and velocity and vorticity fields. The experiment results show that, firstly, with the decrease of the cavitation number, different flow structure characteristics can be observed in the cavitating flows, for unsteady cloud cavitating, a self-oscillation behavior of the whole sheet cavitation is obtained, with large length fluctuations and vapor cloud shedding; as the flow structure changes, there are obvious differences between the velocity distributions of cavitation flows, the high-fluctuating region with lower velocity gradually expands with the decrease of cavitation number, and the lower velocity area relates to the cavitation area. In various stages of cavitation, the vorticity concentrated in the rear vortex separation region. In cloud cavitation stage, more vortices structures can be seen in the cavitation area due to the frequently mass and momentum transformation, for vorticity gathering area, the original vortex changed into a large group of scattered distribution of vorticity, and also, the vortex regions expanded significantly.

Key words: fluid dynamics, hydrofoil, unsteady cavitating flow, particle image velocimetry

中图分类号:

黄彪₁，王国玉₁，王复峰₁，剧冬梅₂, 高德明₁. 绕水翼非定常空化流场的实验研究[J]. 兵工学报, 2012, 33(4): 401-407.

HUANG Biao₁， WANG Guo-yu₁， WANG Fu-feng₁， JU Dong-mei₂, GAO De-ming₁. Experrimental Study on Unsteady Cavitating Flow Around Hydrofoil With Particle ImagingVelocimetry System[J]. Acta Armamentarii, 2012, 33(4): 401-407.

参考文献

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绕水翼非定常空化流场的实验研究

Experrimental Study on Unsteady Cavitating Flow Around Hydrofoil With Particle ImagingVelocimetry System

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