NDLI: Numerical study of the effect of inlet geometry on combustion instabilities in a lean premixed swirl combustor

Content Provider	Springer Nature Link
Author	Lee, Chang Eon Park, Seul Hyun Hwang, Cheol Hong
Copyright Year	2016
Abstract	The effects of flow structure and flame dynamics on combustion instabilities in a lean premixed swirl combustor were numerically investigated using Large eddy simulation (LES) by varying the inlet geometry of combustor. The dynamic k $^{ sgs }$-equation and G-equation flamelet models were respectively employed as the LES subgrid models of turbulence and combustion. The divergent half angle (α) in the combustor inlet was varied systematically from 30° to 90° to quantify the effect of inlet geometry on the combustion instabilities. This variation caused considerable deformation in recirculation zones in terms of their size and location, leading to significant changes in flame dynamics. Analysis of unsteady pressure distributions in the combustor showed that the largest damping caused by combustion instabilities takes place at α = 45°, and the amplitude of acoustic pressure oscillation is largest at α = 30°. Examination of local Rayleigh parameters indicated that controlling flame-vortex interactions by modifying inlet geometry can change the local characteristics of combustion instabilities in terms of their amplification and suppression, and thus serve as a useful approach to reduce the instabilities in a lean premixed swirl combustor. These phenomena were studied in detail through unsteady analysis associated with flow and flame dynamics.
Starting Page	5293
Ending Page	5303
Page Count	11
File Format	PDF
ISSN	1738494X
Journal	Journal of Mechanical Science and Technology
Volume Number	30
Issue Number	11
e-ISSN	19763824
Language	English
Publisher	Korean Society of Mechanical Engineers
Publisher Date	2016-11-12
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Combustion instability Flame dynamics Flame-vortex interaction Gas turbine combustor Large eddy simulation Turbulent premixed flame Mechanical Engineering Vibration, Dynamical Systems, Control Industrial and Production Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Mechanical 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

Combustion instability mechanism of a lean premixed gas turbine combustor

Linear stability analysis of acoustically driven pressure oscillations in a lean premixed gas turbine combustor

Large eddy simulation of turbulent premixed combustion flow around bluff body

Numerical simulation of structure and no formation of turbulent lean-premixed flames in gas turbine conditions

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

Analysis of the combustion oscillation in a silo-type gas turbine combustor and its suppression

Large eddy simulation of turbulent premixed combustion flows over backward facing step

Large Eddy Simulation and Extended Dynamic Mode Decomposition of Flow-Flame Interaction in a Lean Premixed Low Swirl Stabilized Flame

Combustion dynamics in a model lean-premixed gas turbine with a swirl stabilized injector

Numerical study of the effect of inlet geometry on combustion instabilities in a lean premixed swirl combustor

Similar Documents

Combustion instability mechanism of a lean premixed gas turbine combustor

Linear stability analysis of acoustically driven pressure oscillations in a lean premixed gas turbine combustor

Large eddy simulation of turbulent premixed combustion flow around bluff body

Numerical simulation of structure and no formation of turbulent lean-premixed flames in gas turbine conditions

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

Analysis of the combustion oscillation in a silo-type gas turbine combustor and its suppression

Large eddy simulation of turbulent premixed combustion flows over backward facing step

Large Eddy Simulation and Extended Dynamic Mode Decomposition of Flow-Flame Interaction in a Lean Premixed Low Swirl Stabilized Flame

Combustion dynamics in a model lean-premixed gas turbine with a swirl stabilized injector

Numerical study of the effect of inlet geometry on combustion instabilities in a lean premixed swirl combustor