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Influence of the Injector Inlet Angle on the Flow and Spray Behavior of Shear-thinning Fluids in Impinging Jet Injectors

Madlener, Klaus and Moser, Hubert and Ciezki, Helmut (2007) Influence of the Injector Inlet Angle on the Flow and Spray Behavior of Shear-thinning Fluids in Impinging Jet Injectors. In: Energetic Materials - Characterisation and Performance of Advanced Systems, 5-1-5-12. 38th International Annual Conferece of ICT, 2007-06-26 - 2007-06-29, Karlsruhe (Germany). ISSN 0722-4087

Full text not available from this repository.

Abstract

Impinging jet injectors are often used in rocket propulsion systems, where storable liquid propellants shall be feeded. Also for gelled fuels and propellants this injector type is interesting due to its simplicity and relatively small contact areas between gel and injector housing compared to many other injector types. Gelled propellants are shear thinning fluids and show a significantly different rheological behaviour than Newtonian fluids. During storage and transport conditions with very low shear stress values their viscosity is very high and often combined with a distinct yield stress so that they are often described as semi-solid. During the feeding process through pipes and injectors, the structure of the gel is being destroyed, which leads to a decrease of viscosity up to its liquefaction inside the injector unit. Various experimental and theoretical investigations about the impinging jet injector processes with gelled propellants have been conducted in the past years and have shown that impinging jet injectors are interesting candidates for real engine applications. Up to now there are still gaps to be closed in the understanding of the working behaviour of impinging jet injectors with gelled fuels. The aim of the present publication is to present the results of an investigation concerning the influence of the interior injector inlet angle on the feeding process and spray behaviour of three different gelled fuels. For this task pressure loss measurements as well as shadowgraph images have been used to characterize the injection process.

Item URL in elib:https://elib.dlr.de/50541/
Document Type:Conference or Workshop Item (Paper, Poster)
Title:Influence of the Injector Inlet Angle on the Flow and Spray Behavior of Shear-thinning Fluids in Impinging Jet Injectors
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Madlener, KlausUNSPECIFIEDUNSPECIFIED
Moser, HubertUNSPECIFIEDUNSPECIFIED
Ciezki, HelmutUNSPECIFIEDUNSPECIFIED
Date:June 2007
Journal or Publication Title:Energetic Materials - Characterisation and Performance of Advanced Systems
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:5-1-5-12
Editors:
EditorsEmail
FhG-ICT, UNSPECIFIED
ISSN:0722-4087
Status:Published
Keywords:gelled fuels, gelled propellants, non-Newtonian fluid, flow properties, rheology, spray characteristics
Event Title:38th International Annual Conferece of ICT
Event Location:Karlsruhe (Germany)
Event Type:international Conference
Event Dates:2007-06-26 - 2007-06-29
Organizer:Fraunhofer-Institut für Chemische Technologie
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies (old)
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Technologie
Deposited By: Ciezki, Dr.-Ing. Helmut
Deposited On:07 Aug 2007
Last Modified:27 Apr 2009 14:11

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