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Investigation and Modelling of Coaxial Atomization in Liquid Rocket Engines.

Mayer, W. (1994) Investigation and Modelling of Coaxial Atomization in Liquid Rocket Engines. DLR-Interner Bericht. 643/94-3. 38 S.

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The mixing efficiency of injection is an important performance parameter in liquid rocket engines. Coaxial injectors have proven to be advantageous for the injection, atomization and mixing of propellants in cryogenic H2/O2 rocket engines. For these, a round liquid oxygen jet is atomized by a fast coaxial gaseous hydrogen jet.This paper briefly summarizes phenomenlogical studies of coaxial spray generation which based on the most important processes leading to atomization. These are indentified as turbulence in the liquid jet, surface instability, surface wave growth and droplet detachment.An attempt has been made to describe the main atomization processes using analytical and numerical methods. In the proposed atomization model, sub-models for primary break-up and droplet flow are solved in conjunction with the calculation of mean flow properties of gas and liquid flow. The model has been applied to several injection conditions and a comparison of simulation results and experimental data is described. The model limitations and possible extensions are also discussed.

Item URL in elib:https://elib.dlr.de/24814/
Document Type:Monograph (DLR-Interner Bericht)
Additional Information: LIDO-Berichtsjahr=1994,
Title:Investigation and Modelling of Coaxial Atomization in Liquid Rocket Engines.
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Open Access:No
Number of Pages:38
Keywords:rocket engine, coaxial injector, propellant atomization and mixing, jet break-up, surface stability, two phase flow, droplet flow, numerical spray simulation, droplet evaporation, large eddy simulation, spray diagnostics, flow visualization
HGF - Research field:UNSPECIFIED
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:UNSPECIFIED
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):UNSPECIFIED
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Institut für Chemische Antriebe und Verfahrenstechnik
Deposited By: DLR-Beauftragter, elib
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 05:35

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