A review of bias flow liners for acoustic damping in gas turbine combustors

2017 ◽  
Vol 400 ◽  
pp. 564-605 ◽  
Author(s):  
C. Lahiri ◽  
F. Bake
Keyword(s):  
Gas Turbine ◽  
Acoustic Damping ◽  
Gas Turbine Combustors ◽  
Bias Flow

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.

scholarly journals Entropy and Vorticity Wave Generation in Realistic Gas Turbine Combustors

2019 ◽  
Vol 35 (4) ◽  
pp. 839-849 ◽  
Author(s):  
Bernhard Semlitsch ◽  
Tom Hynes ◽  
Ivan Langella ◽  
Nedunchezhian Swaminathan ◽  
Ann P. Dowling
Keyword(s):  
Gas Turbine ◽  
Wave Generation ◽  
Gas Turbine Combustors

Study on the Use of HiCOP Fuel for Gas Turbine Combustors

2017 ◽  
Author(s):  
Hitoshi Fujiwara ◽  
Keiichi Okai ◽  
Mitsumasa Makida ◽  
Kazuo Shimodaira ◽  
Takuya Mizuno ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Gas Turbine Combustors

A Critical Review of NOx Correlations for Gas Turbine Combustors

1975 ◽  
Author(s):  
D. A. Sullivan ◽  
P. A. Mas
Keyword(s):  
Experimental Data ◽  
Data Base ◽  
Gas Turbine ◽  
Critical Review ◽  
Inlet Temperature ◽  
Nox Emissions ◽  
Empirical Correlations ◽  
Gas Turbine Combustors ◽  
Semi Empirical ◽  
Adequate Data

The effect of inlet temperature, pressure, air flowrate and fuel-to-air ratio on NOx emissions from gas turbine combustors has received considerable attention in recent years. A number of semi-empirical and empirical correlations relating these variables to NOx emissions have appeared in the literature. They differ both in fundamental assumptions and in their predictions. In the present work, these simple NOx correlations are compared to each other and to experimental data. A review of existing experimental data shows that an adequate data base does not exist to evaluate properly the various NOx correlations. Recommendations are proposed to resolve this problem in the future.

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