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Combined LAURA-UPS solution procedure for chemically-reacting flowsA new procedure seeks to combine the thin-layer Navier-Stokes solver LAURA with the parabolized Navier-Stokes solver UPS for the aerothermodynamic solution of chemically-reacting air flowfields. The interface protocol is presented and the method is applied to two slender, blunted shapes. Both axisymmetric and three dimensional solutions are included with surface pressure and heat transfer comparisons between the present method and previously published results. The case of Mach 25 flow over an axisymmetric six degree sphere-cone with a noncatalytic wall is considered to 100 nose radii. A stability bound on the marching step size was observed with this case and is attributed to chemistry effects resulting from the noncatalytic wall boundary condition. A second case with Mach 28 flow over a sphere-cone-cylinder-flare configuration is computed at both two and five degree angles of attack with a fully-catalytic wall. Surface pressures are seen to be within five percent with the present method compared to the baseline LAURA solution and heat transfers are within 10 percent. The effect of grid resolution is investigated and the nonequilibrium results are compared with a perfect gas solution, showing that while the surface pressure is relatively unchanged by the inclusion of reacting chemistry the nonequilibrium heating is 25 percent higher. The procedure demonstrates significant, order of magnitude reductions in solution time and required memory for the three dimensional case over an all thin-layer Navier-Stokes solution.
Document ID
19940030215
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Wood, William A. (Washington Univ. Saint Louis, MO, United States)
Date Acquired
September 6, 2013
Publication Date
June 6, 1994
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NAS 1.15:107964
NASA-TM-107964
Accession Number
94N34721
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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