A Supersonic Argon/Air Coaxial Jet Experiment for Computational Fluid Dynamics Code Validation

Clifton, Chandler W.; Cutler, Andrew D.

A non-reacting experiment is described in which data has been acquired for the validation of CFD codes used to design high-speed air-breathing engines. A coaxial jet-nozzle has been designed to produce pressure-matched exit flows of Mach 1.8 at 1 atm in both a center jet of argon and a coflow jet of air, creating a supersonic, incompressible mixing layer. The flowfield was surveyed using total temperature, gas composition, and Pitot probes. The data set was compared to CFD code predictions made using Vulcan, a structured grid Navier-Stokes code, as well as to data from a previous experiment in which a He-O2 mixture was used instead of argon in the center jet of the same coaxial jet assembly. Comparison of experimental data from the argon flowfield and its computational prediction shows that the CFD produces an accurate solution for most of the measured flowfield. However, the CFD prediction deviates from the experimental data in the region downstream of x/D = 4, underpredicting the mixing-layer growth rate.

Document ID

20070018259

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Langley Research Center

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Contractor Report (CR)

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Date Acquired

August 23, 2013

Publication Date

April 1, 2007

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Public

Work of the US Gov. Public Use Permitted.

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