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Experimental Investigation of a High...

Wilson, Johnathan M.,

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Experimental Investigation of a High Velocity Gaseous Jet Injection in an Oscillating Crossflow /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Experimental Investigation of a High Velocity Gaseous Jet Injection in an Oscillating Crossflow // Johnathan M Wilson.
Author:	Wilson, Johnathan M.,
Description:	1 electronic resource (101 pages)
Notes:	Source: Masters Abstracts International, Volume: 86-01.
Contained By:	Masters Abstracts International86-01.
Subject:	Aerospace engineering. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31508100
ISBN:	9798383185889

Experimental Investigation of a High Velocity Gaseous Jet Injection in an Oscillating Crossflow /
Wilson, Johnathan M.,

Experimental Investigation of a High Velocity Gaseous Jet Injection in an Oscillating Crossflow /Johnathan M Wilson. - 1 electronic resource (101 pages)

Source: Masters Abstracts International, Volume: 86-01.

This thesis follows and outlines experiments conducted from 2017 to 2019 related to the gaseous jet in a gaseous crossflow. The experiments examined and analyzed the steady jet in crossflow and the ventured into the steady jet in an oscillating crossflow. As will be explained in the introduction of this thesis, many works have been conducted on the steady jet in crossflow. Likewise, many works are also available for the modulated jet in a steady crossflow. This series of experiments differs in two ways: First, fuel is injected into the crossflow at very high velocities and across highly variant velocities. Second, the crossflow is modulated up to 450 Hz while the jet is kept steady.Analysis of the steady jet in a steady crossflow confirmed conclusions from previous studies while offering additional insights for consideration. First, when dealing highly variant input jet velocities, the effects of that velocity cannot be ignored when estimating jet centerline trajectory. It will be shown that increasing the Jet Reynolds Number yields an increased jet penetration. Second, a two-piece correlation equation determining jet trajectory is more accurate than a single equation. This allows for increased accuracy of the jet potential core, where mixing of the jet and crossflow is most prominent and dictates where the jet will propagate in the far field. Third, the end of the jet potential core, or breakup point, is a function of the momentum flux ratio and the jet Reynolds number. As these values vary, the jet potential core will cease at different \uD835\uDC65 and \uD835\uDC66 locations.  Analysis of the steady jet in an oscillating crossflow allowed for further exploration of the JICF. First, it will be shown that under the effects of an oscillating crossflow, the jet will have a suppressed penetration. Second, on a time-averaged basis, a modulated jet plume will be wider and occupy a larger portion of the combustion chamber. Last, the modulation level, or percentage of velocity fluctuation of the crossflow compared to the mean velocity, \uD835\uDC63' /\uD835\uDC63, has more of an impact on the jet than simply the input frequency. This applies to the physical reaction of the jet trajectory in the crossflow, as well as the amount of mixing of the jet and crossflow. The thesis will conclude with a final summary from the author as well as recommendations for future work in the field of jet in crossflow research. 

English

ISBN: 9798383185889Subjects--Topical Terms:

1002622
Aerospace engineering.
Subjects--Index Terms:

Jet in crossflow

Experimental Investigation of a High Velocity Gaseous Jet Injection in an Oscillating Crossflow /
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245 1 0 $a Experimental Investigation of a High Velocity Gaseous Jet Injection in an Oscillating Crossflow / $c Johnathan M Wilson.
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500 $a Source: Masters Abstracts International, Volume: 86-01.
500 $a Advisors: Lee, Jongguen Committee members: Cuppoletti, Daniel; Orkwis, Paul.
502 $b M.S. $c University of Cincinnati $d 2024.
520 $a This thesis follows and outlines experiments conducted from 2017 to 2019 related to the gaseous jet in a gaseous crossflow. The experiments examined and analyzed the steady jet in crossflow and the ventured into the steady jet in an oscillating crossflow. As will be explained in the introduction of this thesis, many works have been conducted on the steady jet in crossflow. Likewise, many works are also available for the modulated jet in a steady crossflow. This series of experiments differs in two ways: First, fuel is injected into the crossflow at very high velocities and across highly variant velocities. Second, the crossflow is modulated up to 450 Hz while the jet is kept steady.Analysis of the steady jet in a steady crossflow confirmed conclusions from previous studies while offering additional insights for consideration. First, when dealing highly variant input jet velocities, the effects of that velocity cannot be ignored when estimating jet centerline trajectory. It will be shown that increasing the Jet Reynolds Number yields an increased jet penetration. Second, a two-piece correlation equation determining jet trajectory is more accurate than a single equation. This allows for increased accuracy of the jet potential core, where mixing of the jet and crossflow is most prominent and dictates where the jet will propagate in the far field. Third, the end of the jet potential core, or breakup point, is a function of the momentum flux ratio and the jet Reynolds number. As these values vary, the jet potential core will cease at different \uD835\uDC65 and \uD835\uDC66 locations.  Analysis of the steady jet in an oscillating crossflow allowed for further exploration of the JICF. First, it will be shown that under the effects of an oscillating crossflow, the jet will have a suppressed penetration. Second, on a time-averaged basis, a modulated jet plume will be wider and occupy a larger portion of the combustion chamber. Last, the modulation level, or percentage of velocity fluctuation of the crossflow compared to the mean velocity, \uD835\uDC63' /\uD835\uDC63, has more of an impact on the jet than simply the input frequency. This applies to the physical reaction of the jet trajectory in the crossflow, as well as the amount of mixing of the jet and crossflow. The thesis will conclude with a final summary from the author as well as recommendations for future work in the field of jet in crossflow research. 
546 $a English
590 $a School code: 0045
650 4 $a Aerospace engineering. $3 1002622
650 4 $a Engineering. $3 586835
650 4 $a Mechanics. $3 525881
650 4 $a Fluid mechanics. $3 528155
653 $a Jet in crossflow
653 $a Oscillating crossflow
653 $a Jet injection
653 $a Modulation level
653 $a Velocity fluctuation
653 $a Jet trajectory
690 $a 0538
690 $a 0346
690 $a 0537
690 $a 0204
710 2 $a University of Cincinnati. $b Engineering and Applied Science: Aerospace Engineering. $e degree granting institution. $3 3824698
720 1 $a Lee, Jongguen $e degree supervisor.
773 0 $t Masters Abstracts International $g 86-01.
790 $a 0045
791 $a M.S.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31508100