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Analysis of Inviscid Simulations for the Study of Supersonic Retropropulsion

Summary: Analysis of Inviscid Simulations for the Study of
Supersonic Retropropulsion
Nošel M. Bakhtian
Stanford University, Stanford, CA, 94305
Michael J. Aftosmis
NASA Ames Research Center, Moffett Field, CA, 94035
Supersonic retropropulsion (SRP) has been proposed as a candidate enabling technol-
ogy for future high-mass Mars missions. Fast, automated, and robust computations are
useful for investigating the preliminary design space and are necessary for eventual op-
timization of such a system. This paper examines the prediction capability of a steady
Cartesian Euler solver with adjoint-based adaptive mesh refinement when applied to SRP
flows. Comparisons to several wind tunnel data sets and related Navier-Stokes simulations
are made, concentrating on central (1-nozzle) and peripheral (3- and 4-nozzle) configura-
tions at Mach numbers from 3.48 to 4.60, angles of attack ranging from 0
to 20
, and
thrust coefficients from 0.4 to 3. The adjoint-adapted, steady, inviscid simulations show
good agreement of both detailed surface pressures and complex off-body flow features,
demonstrating the ability to capture relevant SRP flow physics and predict loads.
I. Introduction


Source: Alonso, Juan J. - Department of Aeronautics and Astronautics, Stanford University


Collections: Engineering