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Comparison of LDV measurements and Navier-Stokes solutions in a two-dimensional 180-degree turn-around duct (1989)

Monson, Daryl J. ; Seegmiller, H. Lee ; Mcconnaughey, Paul K.

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Publication Date: 2019-06-28

Description: Results from an experimental and numerical investigation of turbulent subsonic flow inside a two-dimensional, strongly curved, 180 deg turn-around duct are presented. Data measured with a two-component, two-color laser Doppler velocimeter include profiles of mean axial velocity and local flow angle. Static pressure distributions are also measured. Results are obtained at a Mach number of 0.1, and at Reynolds numbers of 100,000 and a million based on channel height. Numerical calculations are performed using the incompressible Navier-Stokes equations with a Prandtl mixing length zero-equation turbulence model modified for internal flows. Theory and experiment are compared to evaluate the ability of the turbulence model to predict this class of internal flows with strong curvature.

Keywords: AERODYNAMICS

Type: AIAA PAPER 89-0275

Format: text

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