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An experimental investigation of reacting and nonreacting coaxial jet mixing in a laboratory rocket engine.

Record Type:	Electronic resources : Monograph/item
Title/Author:	An experimental investigation of reacting and nonreacting coaxial jet mixing in a laboratory rocket engine./
Author:	Schumaker, Stephen Alexander.
Description:	219 p.
Notes:	Adviser: James F. Driscoll.
Contained By:	Dissertation Abstracts International70-04B.
Subject:	Engineering, Aerospace. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3354103
ISBN:	9781109113549

An experimental investigation of reacting and nonreacting coaxial jet mixing in a laboratory rocket engine.
Schumaker, Stephen Alexander.

An experimental investigation of reacting and nonreacting coaxial jet mixing in a laboratory rocket engine. - 219 p.

Adviser: James F. Driscoll.

Thesis (Ph.D.)--University of Michigan, 2009.

Coaxial jets are commonly used as injectors in propulsion and combustion devices due to both the simplicity of their geometry and the rapid mixing they provide. In liquid rocket engines it is common to use coaxial jets in the context of airblast atomization. However, interest exists in developing rocket engines using a full flow staged combustion cycle. In such a configuration both propellants are injected in the gaseous phase. In addition, gaseous coaxial jets have been identified as an ideal test case for the validation of the next generation of injector modeling tools. For these reasons an understanding of the fundamental phenomena which govern mixing in gaseous coaxial jets and the effect of combustion on these phenomena in coaxial jet diffusion flames is needed.

ISBN: 9781109113549Subjects--Topical Terms:

1018395
Engineering, Aerospace.

An experimental investigation of reacting and nonreacting coaxial jet mixing in a laboratory rocket engine.
LDR:03212nmm 2200313 a 45 001 874349
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008 100824s2009 ||||||||||||||||| ||eng d
020 $a 9781109113549
035 $a (UMI)AAI3354103
035 $a AAI3354103
040 $a UMI $c UMI
100 1 $a Schumaker, Stephen Alexander. $3 1043615
245 1 3 $a An experimental investigation of reacting and nonreacting coaxial jet mixing in a laboratory rocket engine.
300 $a 219 p.
500 $a Adviser: James F. Driscoll.
500 $a Source: Dissertation Abstracts International, Volume: 70-04, Section: B, page: 2407.
502 $a Thesis (Ph.D.)--University of Michigan, 2009.
520 $a Coaxial jets are commonly used as injectors in propulsion and combustion devices due to both the simplicity of their geometry and the rapid mixing they provide. In liquid rocket engines it is common to use coaxial jets in the context of airblast atomization. However, interest exists in developing rocket engines using a full flow staged combustion cycle. In such a configuration both propellants are injected in the gaseous phase. In addition, gaseous coaxial jets have been identified as an ideal test case for the validation of the next generation of injector modeling tools. For these reasons an understanding of the fundamental phenomena which govern mixing in gaseous coaxial jets and the effect of combustion on these phenomena in coaxial jet diffusion flames is needed.
520 $a A study was performed to better understand the scaling of the stoichiometric mixing length in reacting and nonreacting coaxial jets with velocity ratios greater than one and density ratios less than one. A facility was developed that incorporates a single shear coaxial injector in a laboratory rocket engine capable of ten atmospheres. Optical access allows the use of flame luminosity and laser diagnostic techniques such as Planar Laser Induced Fluorescence (PLIF).
520 $a Stoichiometric mixing lengths (LS), which are defined as the distance along the centerline where the stoichiometric condition occurs, were measured using PLIF. Acetone was seeded into the center jet to provide direct PLIF measurement of the average and instantaneous mixture fraction fields for a range of momentum flux ratios for the nonreacting cases. For the coaxial jet diffusion flames, LS was measured from OH radical contours. For nonreacting cases the use of a nondimensional momentum flux ratio was found to collapse the mixing length data. The flame lengths of coaxial jet diffusion flames were also found to scale with the momentum flux ratio but different scaling constants are required which depended on the chemistry of the reaction. The effective density ratio was measured which allowed the flame lengths to be collapsed to the nonreacting scaling relation. The equivalence principle of Tacina and Dahm was utilized to compare the theoretical and measured effective density ratios.
590 $a School code: 0127.
650 4 $a Engineering, Aerospace. $3 1018395
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Physics, Fluid and Plasma. $3 1018402
690 $a 0538
690 $a 0548
690 $a 0759
710 2 $a University of Michigan. $3 777416
773 0 $t Dissertation Abstracts International $g 70-04B.
790 $a 0127
790 1 0 $a Driscoll, James F., $e advisor
791 $a Ph.D.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3354103