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环形槽对通气空泡融合的促进作用分析

孙龙泉 颜皓 马贵辉 赵纪鹏

孙龙泉, 颜皓, 马贵辉, 赵纪鹏. 环形槽对通气空泡融合的促进作用分析[J]. 力学学报, 2021, 53(2): 386-394. doi: 10.6052/0459-1879-20-271
引用本文: 孙龙泉, 颜皓, 马贵辉, 赵纪鹏. 环形槽对通气空泡融合的促进作用分析[J]. 力学学报, 2021, 53(2): 386-394. doi: 10.6052/0459-1879-20-271
Sun Longquan, Yan Hao, Ma Guihui, Zhao Jipeng. ANALYSIS OF THE PROMOTING EFFECT OF ANNULAR GROOVE ON THE COALESCENCE OF VENTILATED CAVITY[J]. Chinese Journal of Theoretical and Applied Mechanics, 2021, 53(2): 386-394. doi: 10.6052/0459-1879-20-271
Citation: Sun Longquan, Yan Hao, Ma Guihui, Zhao Jipeng. ANALYSIS OF THE PROMOTING EFFECT OF ANNULAR GROOVE ON THE COALESCENCE OF VENTILATED CAVITY[J]. Chinese Journal of Theoretical and Applied Mechanics, 2021, 53(2): 386-394. doi: 10.6052/0459-1879-20-271

环形槽对通气空泡融合的促进作用分析

doi: 10.6052/0459-1879-20-271
基金项目: 1) 基础加强计划技术领域基金项目(2019-JCJQ-JJ-293);国家自然科学基金企业创新发展联合基金重点支持项目(U20B2005);黑龙江省博士后面上资助项目资助(002010830607)
详细信息
    作者简介:

    3) 马贵辉, 讲师, 主要研究方向: 流动控制, 多相流, 水下发射. E-mail:maguihui@hrbeu.edu.cn
    2) 孙龙泉, 副教授, 主要研究方向: 水下发射, 空泡动力学, 流固耦合分析. E-mail: sunlongquan@hrbeu.edu.cn;

    通讯作者:

    孙龙泉

    马贵辉

  • 中图分类号: O359+.1

ANALYSIS OF THE PROMOTING EFFECT OF ANNULAR GROOVE ON THE COALESCENCE OF VENTILATED CAVITY

  • 摘要:

    航行体出水过程中肩部的自然空化将影响航行体的载荷分布及出水姿态,工程上常采用肩部开孔通气的方式改善航行体表面的力学环境, 进而解决此类问题.本文针对水下航行体通气空泡周向融合效果不理想问题, 基于有限体积法,采用VOF (volume of fluid)多相流模型和动态铺层的动网格技术,数值研究了排气孔下游增加小尺度环形凹槽促进空泡融合的作用机制,以及不同发展阶段、不同工况下环形凹槽对空泡融合的促进作用. 结果表明,凹槽可以有效改善通气空泡的融合效果.运动坐标系下来流经过环形凹槽时因为流动膨胀发生了边界层的流动分离,其诱导产生的卷吸作用一方面迟滞了空泡的轴向发展,促进空泡产生周向尺寸更大的剪切涡并沿周向膨胀发展,另一方面将部分通气气体吸入环形凹槽,吸入槽内的气体通过挤压破碎实现了周向融合,且槽内融合气泡溢出下泄促进融合边界上移. 此外,凹槽可以通过改善空泡内部的流动状态,使空泡的形态和内部压力在不同工况下都更加稳定.

     

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  • 收稿日期:  2020-08-04
  • 刊出日期:  2021-02-10

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