NDLI: Estimation of Burner Can-Induced Excitation Levels in an Industrial Gas Turbine

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Maria, A. Mayorca Bladh, Ronnie Ozturk, Utkudeniz
Copyright Year	2013
Abstract	Burner cans lead to a flow field at the turbine inlet with higher temperature gradients than in annular combustors. The circumferential unevenness of the temperature can become a relevant source of harmonic excitation on the downstream rotor blades. The main purpose of this work is to estimate the forcing levels of the burner can excitations on blades through the entire turbine, i.e., not only the blades immediately downstream of the burners cans are of interest. Both the compressor turbine and the power turbine are modeled in a unique setup using 3D unsteady flow simulations. Two relevant turbine inlet temperature distributions are considered. The high cycle fatigue risk due to the excitation from the burner can harmonics is assessed for the last stage rotor blade. The obtained results show that the hot streaks constitute an important source of excitation, but that the stress level of this blade can be expected to stay below the fatigue limit. A further phenomenological study is conducted in order to understand the annular flow unevenness propagation along the stages. The hot streak-induced flow perturbations are found to vary considerably in both annular and span-wise directions. The blade force stimuli of the first burner can harmonic are found to remain on the same order through the turbine, while the second harmonic stimuli exhibit a one-order decay. The possibility to use simplified models to predict burner can excitation is discussed and found less promising.
Sponsorship	International Gas Turbine Institute
File Format	PDF
ISBN	9780791855270
DOI	10.1115/GT2013-95849
Volume Number	Volume 7B: Structures and Dynamics
Conference Proceedings	ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
Language	English
Publisher Date	2013-06-03
Publisher Place	San Antonio, Texas, USA
Access Restriction	Subscribed
Subject Keyword	Industrial gases Temperature distribution Temperature Blades High cycle fatigue Rotors Risk Compressors Fatigue limit Unsteady flow Flow (dynamics) Stress Temperature gradient Simulation Excitation Engineering simulation Combustion chambers Turbines
Content Type	Text
Resource Type	Article

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