Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2007-11-19
2011-11-22
Edgar, Richard (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
C703S009000
Reexamination Certificate
active
08061988
ABSTRACT:
The present invention is a process for designing the internal cooling passages with these small scale features using a meshed solid model in a FEA program to perform the CFD analysis. Instead of modeling these small scale features (cooling holes, impingement holes, and turbulators) in the meshed FEA solid model, most of the small scale features are replaced by grid extraneous source terms in which the small scale feature is eliminated from the solid model and replaced with point source terms. The source terms can duplicate the effect of the feature within the analysis without requiring the complex analysis that such features would require in the analysis. Text files for each of the cooling holes, impingement holes and turbulators are inputted and then translated into grid extraneous source terms that include position, energy, and continuity. A conjugate CFD solver performs an analysis and produces new values for the thermal and boundary conditions.
REFERENCES:
patent: 5738493 (1998-04-01), Lee et al.
J. Kruckels, Turbine blade thermal design process enhancements for increased firing temperatures and reduced coolant flow, Proceedings of GT2007 ASME Turbo Expo 2007, Power for Land, Sea and Air, May 14-17, Montral, Canada.
S. Na, Internal and film cooling of a flat plate with conjugate heat transfer, Proceedings of GT2007 ASME Turbo Expo 2007, Power for Land, Sea and Air, May 14-17, Montral, Canada.
Gregory M. Laskowski, Heat transfer predictions of film cooled stationary turbine airfoils, Proceedings of GT2007 ASME Turbo Expo 2007, Power for Land, Sea and Air, May 14-17, Montral, Canada.
Downs James P.
Landis Kenneth K.
Rawlings Christopher K.
Edgar Richard
Florida Turbine Technologies, Inc.
Ryznic John
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