Effect of Convergent Section Contour on the Sonic Line in Rocket Engine Nozzles

Germer, Eduardo Matos; Marchi, Carlos Henrique

doi:10.5028/jatm.v10.924

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2023

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“…The influence of the convergent design parameters on the sonic line curvature was recently investigated by Germer et al [15]. For the case of an inviscid flow, the authors highlighted the effects of the angle at the convergent inlet, the radius upstream and downstream the throat on the curve flatness of the Mach number distribution curve at the throat region.…”

Section: Introductionmentioning

confidence: 99%

Numerical characterization of shock separation in a laboratory-scale nozzle

Nedjari

Benarous²,

Benazza

2023

Rev. Mex. Fís.

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The purpose of this work is to perform a CFD study of the free shock separation (FSS) in an overexpanded nozzle. The original contraction profile of the nozzle was numerically replaced by a set of curves, where the overall length was identical with the test-rig. For the baseline case, the static pressure and the separation location exhibited a good agreement with the experimental measurements, provided by the DLR. The Error-function contraction profile has revealed a relative displacement of 1.38% on the separation location in the core flow direction. In this case, there was an increase in the thrust coefficient, that has been improved up to 1.7% in comparison with the baseline nozzle design.

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Section: Introductionmentioning

confidence: 99%