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Investigation of Temperature Ratio E...

Mississippi State University.

Investigation of Temperature Ratio Effect on the Low-Frequency Acoustic Spectra of Heated Jets.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Investigation of Temperature Ratio Effect on the Low-Frequency Acoustic Spectra of Heated Jets./
Author:	Karam, Sofia.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	97 p.
Notes:	Source: Masters Abstracts International, Volume: 57-02.
Contained By:	Masters Abstracts International57-02(E).
Subject:	Aerospace engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10642306
ISBN:	9780355516500

Investigation of Temperature Ratio Effect on the Low-Frequency Acoustic Spectra of Heated Jets.
Karam, Sofia.

Investigation of Temperature Ratio Effect on the Low-Frequency Acoustic Spectra of Heated Jets. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 97 p.

Source: Masters Abstracts International, Volume: 57-02.

Thesis (M.Eng.)--Mississippi State University, 2017.

Jet noise remains one of the most important problems in the aviation industry, and its reduction is sought in the context of both commercial and military aircraft. In this thesis, an investigation of the jet noise is conducted in terms of the effect of temperature and Mach number on low frequency acoustic spectra. A low-order model derived from the generalized acoustic analogy method via a low-frequency asymptotic approach is utilized, where the mean flow and pertinent statistical quantities are obtained from RANS simulations. The study involves a combination of seven acoustic Mach numbers ranging from 0.3 to 1.5 and five temperature ratios (TR) ranging from 1 to 3. The model is calibrated with existing experimental measurements of a Mach 0.9 and TR = 1 jet. The results show that the sound pressure level increases with the increase in Mach number, and decreases with the decrease in temperature ratios.

ISBN: 9780355516500Subjects--Topical Terms:

686400
Aerospace engineering.

Investigation of Temperature Ratio Effect on the Low-Frequency Acoustic Spectra of Heated Jets.
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020 $a 9780355516500
035 $a (MiAaPQ)AAI10642306
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100 1 $a Karam, Sofia. $3 1148643
245 1 0 $a Investigation of Temperature Ratio Effect on the Low-Frequency Acoustic Spectra of Heated Jets.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 97 p.
500 $a Source: Masters Abstracts International, Volume: 57-02.
500 $a Adviser: Adrian Sescu.
502 $a Thesis (M.Eng.)--Mississippi State University, 2017.
520 $a Jet noise remains one of the most important problems in the aviation industry, and its reduction is sought in the context of both commercial and military aircraft. In this thesis, an investigation of the jet noise is conducted in terms of the effect of temperature and Mach number on low frequency acoustic spectra. A low-order model derived from the generalized acoustic analogy method via a low-frequency asymptotic approach is utilized, where the mean flow and pertinent statistical quantities are obtained from RANS simulations. The study involves a combination of seven acoustic Mach numbers ranging from 0.3 to 1.5 and five temperature ratios (TR) ranging from 1 to 3. The model is calibrated with existing experimental measurements of a Mach 0.9 and TR = 1 jet. The results show that the sound pressure level increases with the increase in Mach number, and decreases with the decrease in temperature ratios.
590 $a School code: 0132.
650 4 $a Aerospace engineering. $3 686400
650 4 $a Acoustics. $3 670692
690 $a 0538
690 $a 0986
710 2 $a Mississippi State University. $b Aerospace Engineering. $3 1148641
773 0 $t Masters Abstracts International $g 57-02(E).
790 $a 0132
791 $a M.Eng.
792 $a 2017
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10642306

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