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克努森数在微尺度相似流动特性研究中的作用

许艳芝 朱惠人 郑杰

许艳芝, 朱惠人, 郑杰. 克努森数在微尺度相似流动特性研究中的作用[J]. 航空动力学报, 2013, 28(8): 1752-1758.
引用本文: 许艳芝, 朱惠人, 郑杰. 克努森数在微尺度相似流动特性研究中的作用[J]. 航空动力学报, 2013, 28(8): 1752-1758.
XU Yan-zhi, ZHU Hui-ren, ZHENG Jie. Effect of Knudsen number on microscale similar flow characteristics[J]. Journal of Aerospace Power, 2013, 28(8): 1752-1758.
Citation: XU Yan-zhi, ZHU Hui-ren, ZHENG Jie. Effect of Knudsen number on microscale similar flow characteristics[J]. Journal of Aerospace Power, 2013, 28(8): 1752-1758.

克努森数在微尺度相似流动特性研究中的作用

基金项目: 国家重点基础研究发展计划(2013CB035702)

Effect of Knudsen number on microscale similar flow characteristics

  • 摘要: 为了研究克努森数对微尺度相似流动的影响,选取孔径分别为3,1,0.5,0.3mm的相似小孔模型并视流体为连续介质,在相同的雷诺数下对各尺度小孔流体克努森数不同和相同的情况进行数值模拟,计算小孔的质量流量系数并分析其内部流场特征.结果表明:在相同的雷诺数下,原件与放大件的内部流场在克努森数相同时表现出更好的相似性,小孔质量流量系数也表现出更好的吻合性,因此在采用相似放大模型研究微小尺度结构的流动特性时,为了得到更为准确的结果,必须保证相似放大件和微尺度原件克努森数相同.

     

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出版历程
  • 收稿日期:  2012-08-01
  • 刊出日期:  2013-08-28

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