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Longitudinal afterbody grooves and shoulder radiusing for low-speed bluff body drag reduction (1981)

Howard, F. G. ; Weinstein, L. M. ; Bushnell, D. M. ; [et al.]

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Publication Date: 2019-07-13

Description: A new low-speed drag reduction approach is proposed which employs longitudinal surface V-shaped grooves cutting through the afterbody shoulder region. The test Reynolds number range was from 20,000 to 200,000 based on undisturbed free-stream flow and a body diameter of 6.08 cm. The V-grooves are shown to be most effective in reducing drag when the afterbody shoulder radius is zero. Reductions in drag of up to 33% have been measured for this condition. For large shoulder radius, the grooves are only effective at the lower Reynolds numbers of the test.

Keywords: AERODYNAMICS

Type: ASME PAPER 81-WA/FE-5 , Winter Annual Meeting; Nov 15, 1981 - Nov 20, 1981; Washington, DC

Format: text

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