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凝结相变对低温风洞雷诺数试验的影响

孙皖 徐涛 刘秀芳

孙皖, 徐涛, 刘秀芳. 凝结相变对低温风洞雷诺数试验的影响[J]. 航空动力学报, 2020, 35(9): 1893-1899. doi: 10.13224/j.cnki.jasp.2020.09.011
引用本文: 孙皖, 徐涛, 刘秀芳. 凝结相变对低温风洞雷诺数试验的影响[J]. 航空动力学报, 2020, 35(9): 1893-1899. doi: 10.13224/j.cnki.jasp.2020.09.011
SUN Wan, XU Tao, LIU Xiufan. Effect of condensation phase transient on Reynold number test for cryogenic wind tunnel[J]. Journal of Aerospace Power, 2020, 35(9): 1893-1899. doi: 10.13224/j.cnki.jasp.2020.09.011
Citation: SUN Wan, XU Tao, LIU Xiufan. Effect of condensation phase transient on Reynold number test for cryogenic wind tunnel[J]. Journal of Aerospace Power, 2020, 35(9): 1893-1899. doi: 10.13224/j.cnki.jasp.2020.09.011

凝结相变对低温风洞雷诺数试验的影响

doi: 10.13224/j.cnki.jasp.2020.09.011
基金项目: 国家自然科学基金青年基金(51706025); 重庆市自然科学基金(cstc2019jcyj-msxmX0494)

Effect of condensation phase transient on Reynold number test for cryogenic wind tunnel

  • 摘要: 为了研究凝结相变对低温风洞雷诺数试验能力的影响,基于Fluent软件建立了气-液两相凝结流动模型,相变模型采用考虑非等温效应修正的经典成核理论和Gyarmathy液滴生长理论;针对不同来流压力和不同试验雷诺数工况条件,对氮气绕流NACA 0012翼型进行了数值模拟。模拟结果表明:随着来流温度的降低,翼型附近区域气体膨胀越过气态饱和线并达到过冷状态,进一步降低来流温度则会在宏观层面上观测到凝结相变对当地流场的改变,与无凝结相变的流场相比,释放的潜热加热气流导致马赫数降低及压力系数的改变;在确保不破坏翼型气动性能试验的前提下,充分利用气体过冷区域来降低来流压力以此减少驱动功率和液氮喷入量是可行的,或者保持来流压力不变提升低温风洞的试验雷诺数。

     

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出版历程
  • 收稿日期:  2020-02-23
  • 刊出日期:  2020-09-28

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