半球头模型空化流场非定常特性的数值模拟

doi:10.3969/j.issn.1000-1093.2012.09.018

兵工学报 ›› 2012, Vol. 33 ›› Issue (9): 1124-1130.doi: 10.3969/j.issn.1000-1093.2012.09.018

半球头模型空化流场非定常特性的数值模拟

王柏秋¹，王聪¹，黄海龙^2,3，董磊⁴，张嘉钟¹

(1.哈尔滨工业大学航天学院, 黑龙江哈尔滨 150001; 2.北京宇航系统工程研究所, 北京 100076;3.哈尔滨工业大学土木学院黑龙江哈尔滨 150090; 4.中国船舶重工集团公司第703研究所黑龙江哈尔滨 150036)

收稿日期:2011-11-28 修回日期:2011-11-28 上线日期:2014-03-04
作者简介:王柏秋（1981—），男，博士研究生
基金资助:
国家自然科学基金项目(51149003)

Numerical Study on Unsteady Characteristics of Cavitation Flow Generated from Hemispherical Model

WANG Bai-qiu¹, WANG Cong¹, HUANG Hai-long^2,3, DONG Lei⁴, ZHANG Jia-zhong¹

(1.School of Astronautics, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China;2.Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China;3.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China;4.No.703 Research Institute, China Shipbulding Industry Corporation, Harbin 150036, Heilongjiang, China)

Received:2011-11-28 Revised:2011-11-28 Online:2014-03-04

摘要/Abstract

摘要： 为了更好地利用数值方法研究空化流场的非定常特性，结合简化的Rayleigh-Plesset方程，建立了一个新的空化模型。利用新空化模型对半球头水下航行体的空化流场分别进行了定常和非定常的二维轴对称数值模拟研究。新空化模型的成功应用表明，空泡在扩张过程中发生冷凝相变，在收缩过程中发生蒸发相变。由数值模拟与实验现象的比对分析可知，按照空化数大小，空化流场分为3种类型，分别是超空化流场、次生空化流场和弱空化流场，且由于非定常性影响，每种类型的空化流场都对应着不同的模型系数。新空化模型能够成功捕捉空化流场的非定常细节，有助于进一步研究空化机理。

关键词: 流体力学, Rayleigh-Plesset方程, 空化模型, 相变, 次生空泡

Abstract: To further study the unsteady characteristics of cavitation flow, a new mathematical cavitation model based on Rayleigh-Plesset equation was given out. Both steady and unsteady cavitation flow generated from hemispherical cylinder were simulated numerically by using the new model in 2D axial symmetrical coordinates. The successful application and validation of the new model show that the condensation occurs when the bubble expands and evaporation happens when the bubble collapses. It can be seen from the analysis of the experiments and the numerical simulations that, according to the cavitation number, the cavitation flow is divided into three types, i.e. supercavitation flow, secondary cavitation flow and weak cavitation flow. Due to the unsteadiness, each type of cavitation flow corresponds to different model coefficients. The new cavitation model can successfully capture the unsteady details of the cavitation flow, and it is helpful to further study the mechanism of cavitation.

Key words: hydromechanics, Rayleigh-Plesset equation, cavitation model, phase transition, secondary cavitation

中图分类号:

王柏秋，王聪，黄海龙，董磊，张嘉钟. 半球头模型空化流场非定常特性的数值模拟[J]. 兵工学报, 2012, 33(9): 1124-1130.

WANG Bai-qiu, WANG Cong, HUANG Hai-long, DONG Lei, ZHANG Jia-zhong. Numerical Study on Unsteady Characteristics of Cavitation Flow Generated from Hemispherical Model[J]. Acta Armamentarii, 2012, 33(9): 1124-1130.

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半球头模型空化流场非定常特性的数值模拟

Numerical Study on Unsteady Characteristics of Cavitation Flow Generated from Hemispherical Model

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