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Design Evaluation Using Finite Element Analysis of Cooled Silicon Nitride Plates for a Turbine Blade ApplicationTwo- and three-dimensional finite element analyses were performed on uncoated and thermal barrier coated (TBC) silicon nitride plates with and without internal cooling by air. Steady-state heat-transfer analyses were done to optimize the size and the geometry of the cooling channels to reduce thermal stresses, and to evaluate the thermal environment experienced by the plate during burner rig testing. The limited experimental data available were used to model the thermal profile exerted by the flame on the plate. Thermal stress analyses were performed to assess the stress response due to thermal loading. Contours for the temperature and the representative stresses for the plates were generated and presented for different cooling hole sizes and shapes. Analysis indicates that the TBC experienced higher stresses, and the temperature gradient was much reduced when the plate was internally cooled by air. The advantages and disadvantages of several cooling channel layouts were evaluated.
Document ID
20010097613
Acquisition Source
Glenn Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Abdul-Aziz, Ali
(Cleveland State Univ. Cleveland, OH United States)
Baaklini, George Y.
(NASA Glenn Research Center Cleveland, OH United States)
Bhatt, Ramakrishna T.
(Army Research Lab. Cleveland, OH United States)
Date Acquired
September 7, 2013
Publication Date
June 1, 2001
Subject Category
Structural Mechanics
Report/Patent Number
NASA/TM-2001-210819
E-12735
NAS 1.15:210819
Meeting Information
Meeting: 103rd Annual Meeting and Exposition
Location: Indianapolis, IN
Country: United States
Start Date: April 22, 2001
End Date: April 25, 2001
Sponsors: American Ceramic Society
Funding Number(s)
PROJECT: RTOP 708-31-13
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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