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Real-Gas Effects on Mean Flow and Temporal Stability of Binary-Species Mixing Layers

Okong'o, Nora and Bellan, Josette (2003) Real-Gas Effects on Mean Flow and Temporal Stability of Binary-Species Mixing Layers. AIAA Journal, 41 (12). pp. 2429-2443. ISSN 0001-1452. doi:10.2514/2.6842.

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Real-gas effects on the mean flow and inviscid stability of temporal mixing layers are examined for supercritical heptane/nitrogen and oxygen/hydrogen mixtures. The analysis is based on the compressible Navier–Stokes equations for conservation of mass, momentum, total energy, and species mass, with heat and species-mass fluxes derived from fluctuation-dissipation theory and incorporating Soret and Dufour effects. An approximate form of the equations is used to obtain a system of similarity equations for the streamwise velocity, the temperature, and the mass fraction. The similarity profiles show important real-gas nonideal-mixture effects, particularly for the temperature, in departing from the incompressible error-function similarity solution. Realistic Schmidt and Prandtl numbers were found to be important to the similarity profiles. A linear, inviscid stability analysis is then performed using the similarity profile, as well as analytical error-function profiles, as its basic flow. The stability analysis shows that the similarity profile has larger growth rates at a given wavelength and a shorter more unstable wavelength than the error-function profiles and than an incompressible flow. The similarity profile also has a larger range of unstable wavelengths than the error-function profiles.

Item Type:Article
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Bellan, Josette0000-0001-9218-7017
Additional Information:© 2003 by the California Institute of Technology. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Received 19 February 2003; revision received 10 July 2003; accepted for publication 27 August 2003. This study was conducted at the Jet Propulsion Laboratory (JPL), California Institute of Technology, and sponsored jointly by the Air Force Office of Scientific Research under the direction of Julian Tishkoff, by the Army Research Office under the direction of David Mann under an interagency agreement with NASA, and by NASA Marshall Space Flight Center, under the direction of John Hutt. The computational resources were provided by the JPL Supercomputing Center.
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Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Issue or Number:12
Record Number:CaltechAUTHORS:20171025-084425585
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Official Citation:Real-Gas Effects on Mean Flow and Temporal Stability of Binary-Species Mixing Layers Nora Okong', o, and Josette Bellan AIAA Journal 2003 41:12, 2429-2443
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82646
Deposited By: Tony Diaz
Deposited On:25 Oct 2017 15:52
Last Modified:15 Nov 2021 19:52

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