Comparison of LDV measurements and Navier-Stokes solutions in a two-dimensional 180-degree turn-around ductResults 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.
Document ID
19890037861
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Monson, Daryl J. (NASA Ames Research Center Moffett Field, CA, United States)
Seegmiller, H. Lee (NASA Ames Research Center Moffett Field, CA, United States)
Mcconnaughey, Paul K. (NASA Marshall Space Flight Center Huntsville, AL, United States)