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Application of a Real-Gas-Library Multi-Fluid-Mixing Model to Supercritical Single Injector Flow

Banuti, Daniel and Hannemann, Klaus (2014) Application of a Real-Gas-Library Multi-Fluid-Mixing Model to Supercritical Single Injector Flow. American Institute of Aeronautics and Astronautics. 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2014-07-28 - 2014-07-30, Cleveland, Ohio, USA. doi: 10.2514/6.2014-3791.

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Official URL: http://arc.aiaa.org/doi/pdf/10.2514/6.2014-3791


In this paper we report on supercritical single injector computations using a new type of real gas CFD model. This Euler-Euler model is an extension to the DLR TAU CFD code. By storing fluid data in a library, we were able to decouple equation of state (EOS) accuracy from runtime performance. The library covers all fluid states effciently and robust, including gaseous, liquid, supercritical, and multiphase states. In our new multifluid mixing model, an EOS is solved for each species. Computations were carried out using a modifed Benedict-Webb-Rubin high fidelity equation of state for cryogenic oxygen, with negligible penalty in performance compared to a pure ideal gas computation. Additional species (H, H2, O, OH, H2O, H2O2) were treated as perfect gases. The immediate goal is to create a flow solver for industrial application, i.e. to support design by enabling a fast turnaround. Thus, we focus on 2D RANS modeling in this first step. The baseline model is applied to the canonical Mascotte A60 test case. The chamber pressure is well met, the flame dimensions are within the spread found among other CFD results. In accordance with experimental results, the reaction zone is very thin. Maximum OH* occurrences are correctly predicted in the shear layer, reducing in magnitude towards shoulder and flame tip. The fluid library allows to pinpoint the extent of the liquid oxygen core, the length is determined to 20 LOX injector diameters. It is found to be embedded in a gaseous oxygen shell. Within this RANS context, H2 and O2 do not coexist in a premixed form. Finally, we show that numerical OH* concentration differs significantly from OH mass fraction distributions, the latter are thus no appropriate data to compare to experiments.

Item URL in elib:https://elib.dlr.de/90408/
Document Type:Conference or Workshop Item (Speech)
Additional Information:DOI: 10.2514/6.2014-3791, eISBN: 978-1-62410-303-2
Title:Application of a Real-Gas-Library Multi-Fluid-Mixing Model to Supercritical Single Injector Flow
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-12
Publisher:American Institute of Aeronautics and Astronautics
Series Name:Conference Proceedings online
Keywords:CFD, real gas, supercritical, injection, EOS
Event Title:50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference
Event Location:Cleveland, Ohio, USA
Event Type:international Conference
Event Start Date:28 July 2014
Event End Date:30 July 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - ProTAU + Prop2020 Hochleistungstriebwerke (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Micknaus, Ilka
Deposited On:15 Sep 2014 13:05
Last Modified:24 Apr 2024 19:56

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