Banuti, Daniel and Hannemann, Klaus (2016) The absence of a dense potential core in supercritical Injection: A thermal break-up mechanism. Physics of Fluids, 28 (3), pp. 1-19. American Institute of Physics (AIP). DOI: 10.1063/1.4943038 ISSN 1070-6631
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Official URL: https://doi.org/10.1063/1.4943038
Abstract
Certain experiments in quasi-isobaric supercritical injection remain unexplained by the current state of theory: Without developing a constant value potential core as expected from the mechanical view of break-up, density is observed to drop immediately upon entering the chamber. Furthermore, this phenomenon has never been captured in computational fluid dynamics (CFD) despite having become a de facto standard case for real fluid CFD validation. In this paper, we present strong evidence for a thermal jet disintegration mechanism (in addition to classical mechanical break-up) which resolves both the theoretical and the computational discrepancies. A new interpretation of supercritical jet disintegration is introduced, based on pseudo-boiling, a nonlinear supercritical transition from gas-like to liquid-like states. We show that thermal disintegration may dominate classical mechanical break-up when heat transfer takes place in the injector and when the fluid state is sufficiently close to the pseudo-boiling point. A procedure which allows to capture subsided cores with standard CFD is provided and demonstrated.
Item URL in elib: | https://elib.dlr.de/104045/ | |||||||||
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Document Type: | Article | |||||||||
Additional Information: | AIP Publishing | |||||||||
Title: | The absence of a dense potential core in supercritical Injection: A thermal break-up mechanism | |||||||||
Authors: |
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Date: | 8 March 2016 | |||||||||
Journal or Publication Title: | Physics of Fluids | |||||||||
Refereed publication: | Yes | |||||||||
Open Access: | Yes | |||||||||
Gold Open Access: | No | |||||||||
In SCOPUS: | Yes | |||||||||
In ISI Web of Science: | Yes | |||||||||
Volume: | 28 | |||||||||
DOI : | 10.1063/1.4943038 | |||||||||
Page Range: | pp. 1-19 | |||||||||
Editors: |
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Publisher: | American Institute of Physics (AIP) | |||||||||
ISSN: | 1070-6631 | |||||||||
Status: | Published | |||||||||
Keywords: | supercritical injection, cryogenic, dense core | |||||||||
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: | Hannemann, Prof. Dr. Klaus | |||||||||
Deposited On: | 18 Jul 2016 10:09 | |||||||||
Last Modified: | 04 Nov 2020 22:34 |
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