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Recent Results on Thread Formation with an Impinging Jet Injector

Negri, M. and Redaelli, M. and Ciezki, H. (2012) Recent Results on Thread Formation with an Impinging Jet Injector. In: Proceedings. 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit , 30. Jul. – 1. Aug. 2012, Atlanta, Georgia, USA.

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Abstract

The formation of thread-like structures instead of droplets was observed during the injection process of distinct gel fuels and non-Newtonian fluids with an impinging jet injector. The objective of the present paper is to contribute to a better understanding of the mechanisms leading to the formation of these structures. Tests with many different Boger fluids have been conducted. To analyze the obtained shadowgraph images of the sprays a graphical analysis method was implemented. This code determines the thread parameter, a number that is associated with an average dimension of the threads. A correlation can be observed between the fluid relaxation time and the thread parameter. On the other hand, shear viscosity and surface tension do not seem to have an influence on thread formation.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Recent Results on Thread Formation with an Impinging Jet Injector
Authors:
AuthorsInstitution or Email of Authors
Negri, M.Michele.Negri@dlr.de
Redaelli, M.UNSPECIFIED
Ciezki, H.Helmut.Ciezki@dlr.de
Date:2012
Journal or Publication Title:Proceedings
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:jet injector, gel fuel
Event Title:48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit
Event Location:Atlanta, Georgia, USA
Event Type:international Conference
Event Dates:30. Jul. – 1. Aug. 2012
Organizer:AIAA
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 - Antriebsystemtechnik - Schubkammertechnologie
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Treibstoffe
Deposited By: Michaela Hanke
Deposited On:03 Nov 2012 09:18
Last Modified:03 Nov 2012 09:18

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