Measurement of acoustic dissipation in an experimental combustor under representative conditions

2017 ◽  
Vol 390 ◽  
pp. 39-54 ◽  
Author(s):  
Samuel Webster ◽  
Justin Hardi ◽  
Michael Oschwald
Keyword(s):  
Acoustic Dissipation

Internal Dynamics in Drying Latex Films: A Study Based on Fluorescence Anisotropy and Acoustic Dissipation

2008 ◽  
Vol 6 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Maryline Clauzel ◽  
Patrick Kékicheff ◽  
Jörg Adams ◽  
Diethelm Johannsmann
Keyword(s):  
Fluorescence Anisotropy ◽  
Latex Films ◽  
Internal Dynamics ◽  
Acoustic Dissipation

Design of Acoustic Liner in Small Gas Turbine Combustor Using One-Dimensional Impedance Models

2018 ◽  
Vol 140 (12) ◽  
Author(s):  
Daesik Kim ◽  
Seungchai Jung ◽  
Heeho Park
Keyword(s):  
Gas Turbine ◽  
Side Wall ◽  
Acoustic Energy ◽  
Gas Turbine Combustor ◽  
Design Guideline ◽  
Acoustic Damping ◽  
Thermoacoustic Instabilities ◽  
Acoustic Dissipation ◽  
Acoustic Liner ◽  
Bias Flow

The side-wall cooling liner in a gas turbine combustor serves main purposes—heat transfer and emission control. Additionally, it functions as a passive damper to attenuate thermoacoustic instabilities. The perforations in the liner mainly convert acoustic energy into kinetic energy through vortex shedding at the orifice rims. In the previous decades, several analytical and semi-empirical models have been proposed to predict the acoustic damping of the perforated liner. In the current study, a few of the models are considered to embody the transfer matrix method (TMM) for analyzing the acoustic dissipation in a concentric tube resonator with a perforated element and validated against experimental data in the literature. All models are shown to quantitatively appropriately predict the acoustic behavior under high bias flow velocity conditions. Then, the models are applied to maximize the damping performance in a realistic gas turbine combustor, which is under development. It is found that the ratio of the bias flow Mach number to the porosity can be used as a design guideline in choosing the optimal combination of the number and diameter of perforations in terms of acoustic damping.

Elastic properties and acoustic dissipation associated with a disorder–order ferroelectric transition in a metal–organic framework

CrystEngComm ◽  
2015 ◽  
Vol 17 (2) ◽  
pp. 370-374 ◽  
Author(s):  
Zhiying Zhang ◽  
Wei Li ◽  
Michael A. Carpenter ◽  
Christopher J. Howard ◽  
Anthony K. Cheetham
Keyword(s):  
Single Crystal ◽  
Elastic Properties ◽  
Metal Organic Framework ◽  
Resonant Ultrasound Spectroscopy ◽  
Ferroelectric Transition ◽  
Temperature Range ◽  
Acoustic Dissipation ◽  
Metal Organic ◽  
Resonant Ultrasound ◽  
Organic Framework

Elastic properties and acoustic dissipation associated with the disorder–order ferroelectric transition in a single crystal metal–organic framework (MOF), [NH4][Zn(HCOO)3], have been investigated using resonant ultrasound spectroscopy (RUS) in the temperature range between 10 K and 300 K.

Acoustic dissipation associated with phase transitions in lawsonite, CaAl2Si2O7(OH)2{middle dot}H2O

2007 ◽  
Vol 92 (10) ◽  
pp. 1665-1672 ◽  
Author(s):  
R. E.A. McKnight ◽  
M. A. Carpenter ◽  
T. W. Darling ◽  
A. Buckley ◽  
P. A. Taylor
Keyword(s):  
Phase Transitions ◽  
Acoustic Dissipation

Acoustic Dissipation and Density of States in Liquid, Supercooled, and Glassy Glycerol

2011 ◽  
Vol 106 (15) ◽  
Author(s):  
L. Comez ◽  
G. Monaco ◽  
C. Masciovecchio ◽  
A. Paciaroni ◽  
A. Gessini ◽  
...  
Keyword(s):  
Density Of States ◽  
Acoustic Dissipation
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