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The absence of a dense potential core in transcritical injection

Banuti, Daniel and Hannemann, Klaus (2015) The absence of a dense potential core in transcritical injection. 15th International Conference on Numerical Combustion, 19. - 22. April 2015, Avignon, France.

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Official URL: http://www.nc15.ecp.fr/

Abstract

Injection of cryogenic nitrogen into a chamber at supercritical conditions has become a popular test case for real gas CFD validation. However, there is a systematic discrepancy: a measured immediate drop of density upon entering the chamber could not be found with theory or CFD. It is shown here that heat transfer to the cryogenic injectant does take place and may explain the exhibited behavior. In a numerical study, different break-up modes could be reproduced by varying heat transfer inside the injector. This thermal break-up is essentially a new break-up mechanism, strongly associated with pseudoboiling, a supercritical state transition from liquidlike to gaslike.

Item URL in elib:https://elib.dlr.de/95091/
Document Type:Conference or Workshop Item (Speech)
Title:The absence of a dense potential core in transcritical injection
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Banuti, Danieldaniel.banuti (at) dlr.deUNSPECIFIED
Hannemann, Klausklaus.hannemann (at) dlr.deUNSPECIFIED
Date:2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:p. 84
Series Name:Book of Abstracts
Status:Published
Keywords:transcritical, injection, cryogenic, dense core
Event Title:15th International Conference on Numerical Combustion
Event Location:Avignon, France
Event Type:international Conference
Event Dates:19. - 22. April 2015
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 - ProTAU + Prop2020 Hochleistungstriebwerke
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Micknaus, Ilka
Deposited On:29 Sep 2015 14:45
Last Modified:29 Sep 2015 14:45

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