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.
![]() |
PDF
- Published version
2MB |
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/ | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Document Type: | Article | ||||||||||||
Additional Information: | AIP Publishing | ||||||||||||
Title: | The absence of a dense potential core in supercritical Injection: A thermal break-up mechanism | ||||||||||||
Authors: |
| ||||||||||||
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: |
| ||||||||||||
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 Transportation | ||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||
DLR - Program: | R RP - Space Transportation | ||||||||||||
DLR - Research theme (Project): | R - Raumfahrzeugsysteme - Anlagen u. Messtechnik (old) | ||||||||||||
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: | 03 Nov 2023 08:02 |
Repository Staff Only: item control page