Measurements and Correlations of Transition Reynolds Numbers on Sharp Slender Cones at High Speeds
Measurements and Correlations of Transition Reynolds Numbers on Sharp Slender Cones at High Speeds
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DOI：
10.2514/3.49919
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发表时间：
1970-06
期刊：
影响因子：
2.5
通讯作者：
S. Pate
中科院分区：
文献类型：
--
作者：
S. Pate
摘要：在12英寸和40英寸的风洞中进行了零偏航时10 °绝热尖锥上层流边界层转捩的实验研究。超音速风洞，自由流马赫数从3到6。本研究旨在确定高速风洞中气动噪声干扰和边界层转捩雷诺数之间的关系，并将以前发表的平面结果扩展到包括轴对称模型。一个显着增加的雷诺数随隧道尺寸的增加（类似的平面结果）被证明存在。来自十个设施（12- 54英寸）的锐锥过渡雷诺数对于自由流马赫数从3到14，每英寸单位雷诺数从100，000到1，200，000的范围，用空气动力学噪声转捩参数进行了关联。锥形和平面雷诺数值之间的比率的定量相关性的开发，这表明了强烈的马赫数的依赖性，也表明了隧道尺寸和单位雷诺数的变化。
Abstract : An experimental investigation of laminar boundary-layer transition on a sharp, 10-deg total-angle, insulated cone at zero yaw was conducted in 12- and 40-in. supersonic wind tunnels at free-stream Mach numbers from 3 to 6. This research was directed toward defining the relationship between the aerodynamic noise disturbances and boundary-layer transition Reynolds numbers in high-speed wind tunnels and extended previously published planar results to include axisymmetric models. A significant increase in the Reynolds numbers with increasing tunnel size (similar to the planar results) is shown to exist. Sharp cone transition Reynolds numbers from ten facilities (12- to 54-in.) for free- stream Mach numbers from 3 to 14 and a unit Reynolds number per inch range from 100,000 to 1,200,000 were correlated using aerodynamic-noise-transition parameters. A quantitative correlation of the ratio between cone and planar Reynolds numbers values was developed which demonstrates a strong Mach number dependence and also indicates a variation with tunnel size and unit Reynolds number.