TECHNICAL PAPERS: Gas Turbines: Ceramics

Reductions in Acquisition Costs for State-of-the-Art Fabrication of CFCC Turbine Engine Combustor Liners

[+] Author and Article Information
Phillip A. Craig

AlliedSignal Composites Inc., Newark, DE 19714-9559

David Godfrey

Manufacturing Resources Inc., Cleveland, OH 44101

J. Eng. Gas Turbines Power 122(3), 401-404 (May 15, 2000) (4 pages) doi:10.1115/1.1287495 History: Received March 09, 1999; Revised May 15, 2000
Copyright © 2000 by ASME
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CFCC combustion liner requirements
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Functional approach used by MRI. The output from the approach is the table in Fig. 4, showing the relationships between design options, process steps, and costs.
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CVI process costs distribution at 120 combustor sets per year. The “Input Material” is predominatly Hi-Nicalon™ fiber. The yield affect includes all losses, also predominatly fiber costs from failed parts. Operations and depreciation combined are about 60 percent CVI reactors, with the rest including building facilities and other equipment. Direct labor is mostly preforming, as a manual process was used in the initial cost model cases. Actual cost estimates in dollars are not shown because of the complexity in representing certain sized parts at certain costs versus other component geometries.
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Cost relationships. Read from right to left. To make an impact on a cost element, consider alternatives in either manufacturing drivers or design drivers. Before changing a design or manufacturing condition, consider the cost element affected.




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