Laminar-turbulent transition on a blunted ogive-conical body at hypersonic speeds

Vaganov, A. V.; Noev, A. Yu.; Plyashechnik, V.; Radchenko, Vladimir; Skuratov, A. S.; Shustov, A. A.

doi:10.1063/1.4963991

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“…Unfortunately, in many reversal observations, it is impossible to answer whether there existed turbulent wedges because measurements were carried out using discrete sensors. Exceptions are 5,6,20 where a panoramic measurement technique was used (as in the present work). In Aleksandrova et al, 6 reversal was mainly due to wedges originating near the nosetip.…”

Section: Introductionmentioning

confidence: 99%

Laminar–turbulent transition reversal on blunt ogive body of revolution at hypersonic speeds

Vaganov

Noev

Radchenko

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part G:

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The influence of flow parameters and nose radius on the location of laminar–turbulent transition is investigated. The model is an ogive-conical body of revolution having half angle about 9°. Experiments were conducted in a shock tunnel at Mach number 5. The transition location was diagnosed by the heat transfer rate distribution determined with the aid of luminescent temperature converters. It is shown that transition reversal can occur either (a) in the absence of turbulent wedges or (b) at a constant level of freestream disturbances. Both increasing and decreasing branches of Re∞,t (Re∞,R) dependency were observed at constant nose radius while varying only the unit Reynolds number.

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