Large eddy simulation of cryogenic coaxial LN2/GH2 injection under supercritical pressures

Conference Paper (2015)
Author(s)

Jan Matheis (Technische Universität München)

Hagen Müller (University of the Federal Armed Forces Munich)

Michael Pfitzner (University of the Federal Armed Forces Munich)

S Hickel (Technische Universität München)

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Publication Year
2015
Language
English
Affiliation
External organisation
Volume number
3
ISBN (electronic)
9780000000002

Abstract

The coaxial injection of cryogenic nitrogen and warm hydrogen into a supercritical nitrogen atmosphere is studied numerically by means of well resolved large-eddy simulation (LES). Numerical data for two operating conditions are compared both quantitatively and qualitatively with a series of experiments [Oschwald et al., 35th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 1999], A detailed thermodynamic analysis of phenomena associated with the binary mixing of nitrogen and hydrogen together with a systematic study of the thermodynamic state of cryogenic nitrogen prior to injection allows an assessment of uncertainties related to both numerical and experimental data. Trans- and supercritical mixing constitutes considerable challenges for numerical simulations with regard to physical modeling and numerical stability. We compare a fully conservative (FC) formulation to a quasi conservative (QC) formulation of the governing equation, which was recently proposed by Terashima and Koshi [J. Comput. Phys., 2012].

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