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可压缩旋转气体中超空化射流的热稳定性

吕明 宁智 阎凯

吕明, 宁智, 阎凯. 可压缩旋转气体中超空化射流的热稳定性[J]. 力学学报, 2018, 50(3): 561-569. doi: 10.6052/0459-1879-17-403
引用本文: 吕明, 宁智, 阎凯. 可压缩旋转气体中超空化射流的热稳定性[J]. 力学学报, 2018, 50(3): 561-569. doi: 10.6052/0459-1879-17-403
Lü Ming, Ning Zhi, Yan Kai. THERMAL STABILITY OF SUPERCAVITATING JET IN A COMPRESSIBLE ROTARY GAS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(3): 561-569. doi: 10.6052/0459-1879-17-403
Citation: Lü Ming, Ning Zhi, Yan Kai. THERMAL STABILITY OF SUPERCAVITATING JET IN A COMPRESSIBLE ROTARY GAS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(3): 561-569. doi: 10.6052/0459-1879-17-403

可压缩旋转气体中超空化射流的热稳定性

doi: 10.6052/0459-1879-17-403
基金项目: 国家自然科学基金(51606006, 51776016), 北京市自然科学基金 (3172025, 3182030)和移动源污染排放控制技术国家工程实验室开放基金(NELMS2017A10)资助项目.
详细信息
    作者简介:

    通讯作者:宁智,教授,主要研究方向:流体力学, 内燃机排放与污染控制. E-mail:zhining@bjtu.edu.cn

    通讯作者:

    宁智

  • 中图分类号: O359;

THERMAL STABILITY OF SUPERCAVITATING JET IN A COMPRESSIBLE ROTARY GAS

  • 摘要: 液体射流热稳定性研究是对射流稳定性问题的更深层次的探讨,可以进一步加深对液体射流分裂与雾化机理的认识,具有重要的学术意义和工程应用价值. 基于射流稳定性理论,在同时考虑射流周围气体旋转、射流和周围气体可压缩性以及射流液体中含空化气泡的条件下,建立了描述可压缩旋转气体中超空化射流热稳定性的数学模型,并对数学模型及其求解方法进行了验证分析;在此基础上,分析了液体射流表面与周围气体间温差及射流内部温度梯度同时作用下对射流稳定性的影响;并进一步探讨了超空化射流的热稳定性. 结果表明,射流表面扰动波的最大扰动增长率、最不稳定频率以及最大扰动波数皆随气液温差的增大呈近似线性增大趋势;射流内部温度梯度的存在使得气液温差对射流的失稳作用更加显著;射流内部温度梯度会抑制超空化对射流稳定性的影响,但气液温差会在一定程度上促进超空化对射流的失稳作用.

     

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出版历程
  • 收稿日期:  2017-12-05
  • 刊出日期:  2018-05-18

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