High-Reynolds-Number Cryogenic Wind Tunnel
High-Reynolds-Number Cryogenic Wind Tunnel
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高雷诺数低温风洞
DOI：
10.2514/3.50500
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发表时间：
1973
期刊：
影响因子：
--
通讯作者：
R. Kilgore
中科院分区：
文献类型：
--
作者：
M. Goodyer;R. Kilgore
理论分析表明，将风洞试验气体冷却至低温可以在不增加动压的情况下大幅提高雷诺数，同时降低风洞驱动功率要求。已经进行了研究，以确定雷诺数和其他参数在马赫数、压力和温度的宽范围内的预期变化，并适当考虑到避免液化和不利的实际气体效应。在低速低温隧道中开发了实用的操作程序。该装置的气动实验证明了理论预测的雷诺数和驱动功率的变化。对安装在水套应变计刺式天平上的机翼模型进行了力和力矩测量，证明了这种天平在低温环境下运行的可行性。虽然大多数类型的风洞可以在低温下运行，但连续流风机驱动的风洞特别适合在低温下充分利用。建筑和操作技术是可用的，成本似乎是可以接受的。
Theoretical considerations indicate that cooling the wind-tunnel test gas to cryogenic temperatures will provide a large increase in Reynolds number with no increase in dynamic pressure while reducing the tunnel drive-power requirements. Studies have been made to determine the expected variations of Reynolds number and other parameters over wide ranges of Mach number, pressure, and temperature with due regard to avoiding liquefaction and adverse real-gas effects. Practical operational procedures have been developed in a low-speed cryogenic tunnel. Aerodynamic experiments in the facility have demonstrated the theoretically predicted variations in Reynolds number and drive power. Force and moment measurements on a wing model mounted on a water-jacketed strain-gage sting balance have demonstrated the feasibility of operation of such balances in a cryogenic environment. Whereas most types of wind tunnels could operate with advantage at cryogenic temperatures, the continuous-flow fan-driven tunnel is particularly well suited to take full advantage of operating at cryogenic temperatures. Constructional and operational techniques are available, and costs appear acceptable.