NDLI: Experimental Characterization of Premixed Flame Instabilities of a Model Gas Turbine Burner

Content Provider	Springer Nature Link
Author	Schildmacher, Kai Uwe Koch, Rainer Bauer, Hans Jörg
Copyright Year	2006
Abstract	In recent years, the NO x emissions of heavy duty gas turbine burners have been significantly reduced by introducing premixed combustion. These highly premixed burners are known to be prone to combustion oscillations. In this paper, investigations of a single model gas turbine burner are reported focusing on thermo-acoustic instabilities and their interaction with the periodic fluctuations of the velocity and pressure. Phase-locked optical measurement techniques such as LDA and LIF gave insight into the mechanisms.Detailed investigations of a gas turbine combustor rig revealed that the combustor as well as the air plenum oscillate in Helmholtz modes. These instabilities could be attributed to the phase lag of the pressure oscillations between the air plenum and the combustor, which causes an acceleration and deceleration of the air flow through the burner and, therefore, alternating patterns of fuel rich and lean bubbles. When these bubbles reach the reaction zone, density fluctuations are generated which in turn lead to velocity fluctuations and, hence, keep up the pressure oscillations.With increasing the equivalence ratio strong combustion oscillations could be identified at the same frequency. Similarly as with weak oscillations, Helmholtz mode pressure fluctuations are present but the resulting velocity fluctuations in the combustor can be described as a pumping motion of the flow. By the velocity fluctuations the swirl stabilization of the flame is disturbed. At the same time, the oscillating pressure inside the combustor reaches its minimum value. Shortly after the flame expands again, the pressure increases inside the combustor. This phenomenon which is triggered by the pressure oscillations inside the air plenum seems to be the basic mechanism of the flame instability and leads to a significant increase of the pressure amplitudes.
Starting Page	177
Ending Page	197
Page Count	21
File Format	PDF
ISSN	13866184
Journal	Flow, Turbulence and Combustion
Volume Number	76
Issue Number	2
e-ISSN	15731987
Language	English
Publisher	Springer Netherlands
Publisher Date	2006-05-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	flame instabilities flow instabilities gas turbine combustion oscillations Automotive and Aerospace Engineering, Traffic Mechanics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Physical and Theoretical Chemistry Chemical Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Effects of Unmixedness on Combustion Instabilities in a Lean-Premixed Gas Turbine Combustor

Flame Surface Density in Turbulent Premixed V-Flame with Buoyancy

Effect of swirl intensity on the flow and combustion of a turbulent non-premixed flat flame

Large Eddy Simulation of Premixed Turbulent Combustion Using Ξ Flame Surface Wrinkling Model

Phase-Locked Temperature Measurements by Two-Line OH PLIF Thermometry of a Self-Excited Combustion Instability in a Gas Turbine Model Combustor

LES of Jets in Cross Flow and Its Application to a Gas Turbine Burner

Observations on Upstream Flame Propagation in the Ignition of Hydrocarbon Jets

Joint RANS/LES Approach to Premixed Flame Modelling in the Context of the TFC Combustion Model

Modelling of a Premixed Swirl-stabilized Flame Using a Turbulent Flame Speed Closure Model in LES

Experimental Characterization of Premixed Flame Instabilities of a Model Gas Turbine Burner

Similar Documents

Effects of Unmixedness on Combustion Instabilities in a Lean-Premixed Gas Turbine Combustor

Flame Surface Density in Turbulent Premixed V-Flame with Buoyancy

Effect of swirl intensity on the flow and combustion of a turbulent non-premixed flat flame

Large Eddy Simulation of Premixed Turbulent Combustion Using Ξ Flame Surface Wrinkling Model

Phase-Locked Temperature Measurements by Two-Line OH PLIF Thermometry of a Self-Excited Combustion Instability in a Gas Turbine Model Combustor

LES of Jets in Cross Flow and Its Application to a Gas Turbine Burner

Observations on Upstream Flame Propagation in the Ignition of Hydrocarbon Jets

Joint RANS/LES Approach to Premixed Flame Modelling in the Context of the TFC Combustion Model

Modelling of a Premixed Swirl-stabilized Flame Using a Turbulent Flame Speed Closure Model in LES

Experimental Characterization of Premixed Flame Instabilities of a Model Gas Turbine Burner