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Injection Characteristics on the Surface of a Coaxial Jet

Branam, R. and Schneider, G. and Volpp, A. and Mayer, W. (2002) Injection Characteristics on the Surface of a Coaxial Jet. In: AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, pp. 1-10. 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Indianapolis, IN, 8.-11. July 2002.

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In high pressure injection systems such as diesel motors, turbojets and rocket engines the injection process is critical in defining performance. The injection jet breakup and mixing controls the burning efficiency and overall energy conversion. This investigation takes a look at the jet behavior for a single injector element to determine the influence of the injection conditions on a round liquid jet. To adjust the relative velocity between the liquid jet and the gaseous ambient a wind tunnel like coaxial flow configuration has been used. This made it possible to distinguish between effects of aerodynamic forces, chamber pressure, jet velocity and turbulence. Shadowgraphy and a novel image processing approach was used to determine the jet surface characteristics; wavelength and amplitude. The absolute injection velocity of the jet seems to affect the structures the most with an increasing velocity causing the wavelengths to be smaller. An increase in chamber pressure seems to have little influence on the jet with no relative velocity between the gas and liquid jet, but increased the amplitude and drop formation frequency at other testing conditions. The amplitude trends provide information about the likelihood of drop formation.

Item URL in elib:https://elib.dlr.de/1568/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2002, monograph_id=AIAA 2002-3695,
Title:Injection Characteristics on the Surface of a Coaxial Jet
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Branam, R.Guest ScientistUNSPECIFIED
Volpp, A.FH HeilbronnUNSPECIFIED
Journal or Publication Title:AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-10
EditorsEmailEditor's ORCID iD
Event Title:38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Indianapolis, IN, 8.-11. July 2002
Organizer:American Institute of Aeronautics and Astronautics
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):E - no assignment
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion
Deposited By: Lohmiller, Monika
Deposited On:16 Sep 2005
Last Modified:06 Jan 2010 13:58

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