Large-Eddy Simulation of Coaxial LN2/GH2 Injection at Trans- and Supercritical Conditions

Müller, Hagen; Pfitzner, Michael; Matheis, Jan; Hickel, Stefan

doi:10.2514/1.b35827

Cited by 47 publications

(16 citation statements)

References 33 publications

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“…In order to investigate high-pressure injection, large-eddy simulations have been carried out with two different solvers. These solvers have been extensively used for supercritical injection simulations of both pure as well as binary jets, see e.g., [8,11,16], whereby one of those solvers is the density-based INCA (www.inca-cfd.com) and the other is a pressure-based version of OpenFOAM (www.openfoam.org). For the reason of clarity and with thermodynamic aspects being the main objective -not the cross-comparison of LES codes -only one set of LES results (INCA) is presented in this paper.…”

Section: Methodsmentioning

confidence: 99%

Experimental and numerical investigation of phase separation due to multicomponent mixing at high-pressure conditions

et al. 2019

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Experiments and numerical simulations were carried out in order to contribute to a better understanding and prediction of high-pressure injection into a gaseous environment. Specifically, the focus was put on the phase separation processes of an initially supercritical fluid due to the interaction with its surrounding. N-hexane was injected into a chamber filled with pure nitrogen at 5 MPa and 293 K and three different test cases were selected such that they cover regimes in which the thermodynamic non-idealities, in particular the effects that stem from the potential phase separation, are significant. Simultaneous shadowgraphy and elastic light scattering experiments were conducted to capture both the flow structure as well as the phase separation. In addition, large-eddy simulations with a vaporliquid equilibrium model were performed. Both experimental and numerical results show phase formation for the cases, where the a-priori calculation predicts two-phase flow. Moreover, qualitative characteristics of the formation process agree well between experiments and numerical simulations and the transition behaviour from a dense-gas to a spray-like jet was captured by both.

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Section: Methodsmentioning

confidence: 99%

Experimental and numerical investigation of phase separation due to multicomponent mixing at high-pressure conditions

et al. 2019

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“…Hickey et al [6] used a second-order accurate Essentially Non-Oscillating (ENO) scheme which was switched to a first-order upwind scheme in gradient regions. Similar approach have been used by Park et al [41], Muller et al [42] and Matheis et al [43]. Dissipation was also introduced via artificial diffusion schemes.…”

Section: Introductionmentioning

confidence: 92%

Comparison of energy-, pressure- and enthalpy-based approaches for modeling supercritical flows

et al. 2019

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At supercritical conditions, thermodynamics may become strongly nonlinear which is reflected by large thermodynamic Jacobian values. This means that small variations in density, momentum or energy can result in large pressure perturbations. Because of such nonlinearities, simulations of high-pressure flows are subject to stability issues when the conservative form of the Navier-Stokes system is employed. In high-Reynolds number simulations, transported quantities

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“…The code uses a pressurebased solution approach for transonic flows based on the compressible version of the PISO method and employs second order linear differences for spatial discretization. Recently, the framework has been used to study both non-reacting 13,14 and reacting 15 flows at rocket-like conditions. In the present contribution, the combustor was simulated with large eddy simulation resolving the larger turbulent scales, while closing the subgrid-scale turbulence using the Vreman model.…”

Section: Institute For Thermodynamics (Unibw) Universität Der Bunmentioning

confidence: 99%

Numerical Investigation of Flow and Combustion in a Single Element GCH4/Gox Rocket Combustor

Roth¹,

Haidn²,

Chemnitz³

et al. 2016

52nd AIAA/SAE/ASEE Joint Propulsion Conference

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Large-Eddy Simulation of Coaxial LN2/GH2 Injection at Trans- and Supercritical Conditions

Cited by 47 publications

References 33 publications

Experimental and numerical investigation of phase separation due to multicomponent mixing at high-pressure conditions

Experimental and numerical investigation of phase separation due to multicomponent mixing at high-pressure conditions

Comparison of energy-, pressure- and enthalpy-based approaches for modeling supercritical flows

Numerical Investigation of Flow and Combustion in a Single Element GCH4/Gox Rocket Combustor

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