An off-design steady state model of a generic turboshaft engine has been implemented to assess the influence of variable free power turbine (FPT) rotational speed on overall engine performance, with particular emphasis on helicopter applications. To this purpose, three off-design flight conditions were simulated and engine performance obtained with different FTP rotational speeds were compared. In this way, the impact on engine performance of a particular speed requested from the main helicopter rotor could be evaluated. Furthermore, an optimization routine was developed to find the optimal FPT speed which minimizes the engine specific fuel consumption (SFC) for each off-design steady state condition. The usual running line obtained with constant design FPT speed is compared with the optimized one. The results of the simulations are presented and discussed in detail. As a final simulation, the main rotor speed Ω required to minimize the engine fuel mass flow was estimated taking into account the different requirements of the main rotor and the turboshaft engine.
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ASME 2012 Gas Turbine India Conference
December 1, 2012
Mumbai, Maharashtra, India
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4516-5
PROCEEDINGS PAPER
Performance of a Turboshaft Engine for Helicopter Applications Operating at Variable Shaft Speed Available to Purchase
Gianluigi Alberto Misté,
Gianluigi Alberto Misté
University of Padova, Padova, Italy
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Ernesto Benini
Ernesto Benini
University of Padova, Padova, Italy
Search for other works by this author on:
Gianluigi Alberto Misté
University of Padova, Padova, Italy
Ernesto Benini
University of Padova, Padova, Italy
Paper No:
GTINDIA2012-9505, pp. 701-715; 15 pages
Published Online:
July 25, 2013
Citation
Misté, GA, & Benini, E. "Performance of a Turboshaft Engine for Helicopter Applications Operating at Variable Shaft Speed." Proceedings of the ASME 2012 Gas Turbine India Conference. ASME 2012 Gas Turbine India Conference. Mumbai, Maharashtra, India. December 1, 2012. pp. 701-715. ASME. https://doi.org/10.1115/GTINDIA2012-9505
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