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Turbulence Modeling of Cavitating Flows in Liquid Rocket Turbopumps

Mani, Karthik V. and Cervone, Angelo and Hickey, Jean-Pierre (2016) Turbulence Modeling of Cavitating Flows in Liquid Rocket Turbopumps. Journal of Fluids Engineering - Transactions of the ASME, 139 (1), pp. 1-10. American Society of Mechanical Engineers (ASME). DOI: 10.1115/1.4034096 ISSN 0098-2202

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Official URL: https://doi.org/10.1115/1.4034096

Abstract

An accurate prediction of the performance characteristics of cavitating cryogenic turbopump inducers is essential for an increased reliance on numerical simulations in the early turbopump design stages of liquid rocket engines (LRE). This work focuses on the sensitivities related to the choice of turbulence models on the cavitation prediction in flow setups relevant to cryogenic turbopump inducers. To isolate the influence of the turbulence closure models for Reynolds-Averaged Navier–Stokes (RANS) equations, four canonical problems are abstracted and studied individually to separately consider cavitation occurring in flows with a bluff body pressure drop, adverse pressure gradient, blade passage contraction, and rotation. The choice of turbulence model plays a significant role in the prediction of the phase distribution in the flow. It was found that the sensitivity to the closure model depends on the choice of cavitation model itself; the barotropic equation of state (BES) cavitation models are far more sensitive to the turbulence closure than the transport-based models. The sensitivity of the turbulence model is also strongly dependent on the type of flow. For bounded cavitation flows (blade passage), stark variations in the cavitation topology are observed based on the selection of the turbulence model. For unbounded problems, the spread in the results due to the choice of turbulence models is similar to noncavitating, single-phase flow cases.

Item URL in elib:https://elib.dlr.de/109957/
Document Type:Article
Additional Information:011301-2 / Vol. 139, JANUARY 2017
Title:Turbulence Modeling of Cavitating Flows in Liquid Rocket Turbopumps
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Mani, Karthik V.UNSPECIFIEDUNSPECIFIED
Cervone, Angelotu delftUNSPECIFIED
Hickey, Jean-PierreJean-Pierre.Hickey (at) dlr.deUNSPECIFIED
Date:14 September 2016
Journal or Publication Title:Journal of Fluids Engineering - Transactions of the ASME
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:139
DOI :10.1115/1.4034096
Page Range:pp. 1-10
Editors:
EditorsEmailEditor's ORCID iD
UNSPECIFIEDASMEUNSPECIFIED
Publisher:American Society of Mechanical Engineers (ASME)
ISSN:0098-2202
Status:Published
Keywords:...
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Anlagen u. Messtechnik
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Bachmann, Barbara
Deposited On:04 Jan 2017 10:47
Last Modified:05 Nov 2020 17:26

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