The objective of the research described here is to develop and demonstrate use of automatic design methods for preswirl nozzles. Performance of preswirled cooling air delivery systems depends critically on the design of these nozzles which is subject to manufacturing and stress constraints. The best solution may be a compromise between cost and performance. Here it is shown that automatic optimization using computational fluid dynamics (CFD) to evaluate nozzle performance can be useful in design. A parametric geometric model of a nozzle with appropriate constraints is first defined and the CFD meshing and solution are then automated. The mesh generation is found to be the most delicate task in the whole process. Direct hill climbing (DHC) and response surface model (RSM) optimization methods have been evaluated. For the test case considered, significant nozzle performance improvements were obtained using both methods, but the RSM model was preferred.
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April 2007
Technical Papers
Automatic Optimization of Preswirl Nozzle Design
Fabio Ciampoli,
Fabio Ciampoli
Fluids Research Centre, School of Engineering,
University of Surrey
, Guildford, Surrey GU2 7XH, UK
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John W. Chew,
John W. Chew
Fluids Research Centre, School of Engineering,
University of Surrey
, Guildford, Surrey GU2 7XH, UK
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Shahrokh Shahpar,
Shahrokh Shahpar
Rolls-Royce plc
, PO Box 31, Derby DE24 8BJ, UK
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Elisabeth Willocq
Elisabeth Willocq
Rolls-Royce plc
, PO Box 31, Derby DE24 8BJ, UK
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Fabio Ciampoli
Fluids Research Centre, School of Engineering,
University of Surrey
, Guildford, Surrey GU2 7XH, UK
John W. Chew
Fluids Research Centre, School of Engineering,
University of Surrey
, Guildford, Surrey GU2 7XH, UK
Shahrokh Shahpar
Rolls-Royce plc
, PO Box 31, Derby DE24 8BJ, UK
Elisabeth Willocq
Rolls-Royce plc
, PO Box 31, Derby DE24 8BJ, UKJ. Eng. Gas Turbines Power. Apr 2007, 129(2): 387-393 (7 pages)
Published Online: February 1, 2006
Article history
Received:
October 1, 2005
Accepted:
February 1, 2006
Citation
Ciampoli, F., Chew, J. W., Shahpar, S., and Willocq, E. (February 1, 2006). "Automatic Optimization of Preswirl Nozzle Design." ASME. J. Eng. Gas Turbines Power. April 2007; 129(2): 387–393. https://doi.org/10.1115/1.2364194
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