This work describes the continuous study that is being done in a small gas turbine that can be used for power generation purposes. Previous studies were conducted aiming to develop a gas generator able to be used in both applications, as a turbojet or as a turboshaft. The gas generator was designed, manufactured and is still under test. The thermodynamic cycle calculation was evaluated as a project-based class, hence, a power turbine was specified and its requirements were determined. The outlet conditions from the gas generator were used to perform the preliminary size of the power turbine. At this phase, the students must use 1D design models considering loss modeling to improve the machine design prediction. The meanline technique was used and the calculations at leading and trailing edges were extrapolated from hub-to-tip, using vortex design methods. With the airfoil stacking for each blade row was possible to determine the 3D geometry of the single stage axial flow turbine. This geometry was assembled in a CAD software to start the mesh generation procedure. After this step, a commercial CFD software was used to calculate the continuity, momentum and energy equations from fluid mechanics. The flow was considered fully turbulent and the two-equation SST turbulence model was set to determine the flow eddy viscosity. The results from preliminary design and 3D techniques were compared and evaluated to complete the first round of the design phase. In this work, experiences from the project-based class on turbomachinery design are described together with the challenges and difficulties that appeared during the project.
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ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
June 15–19, 2015
Montreal, Quebec, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5675-8
PROCEEDINGS PAPER
Study and Analysis of a Power Turbine Preliminary Design for a Small Turboshaft
C. Bringhenti,
C. Bringhenti
Instituto Tecnológico de Aeronáutica, ITA, São Paulo dos Campos, SP, Brazil
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J. T. Tomita,
J. T. Tomita
Instituto Tecnológico de Aeronáutica, ITA, São Paulo dos Campos, SP, Brazil
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D. F. Cavalca,
D. F. Cavalca
Instituto Tecnológico de Aeronáutica, ITA, São Paulo dos Campos, SP, Brazil
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V. G. Monteiro,
V. G. Monteiro
Instituto Tecnológico de Aeronáutica, ITA, São Paulo dos Campos, SP, Brazil
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O. F. R. da Silva
O. F. R. da Silva
Instituto Tecnológico de Aeronáutica, ITA, São Paulo dos Campos, SP, Brazil
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C. Bringhenti
Instituto Tecnológico de Aeronáutica, ITA, São Paulo dos Campos, SP, Brazil
J. T. Tomita
Instituto Tecnológico de Aeronáutica, ITA, São Paulo dos Campos, SP, Brazil
D. F. Cavalca
Instituto Tecnológico de Aeronáutica, ITA, São Paulo dos Campos, SP, Brazil
V. G. Monteiro
Instituto Tecnológico de Aeronáutica, ITA, São Paulo dos Campos, SP, Brazil
O. F. R. da Silva
Instituto Tecnológico de Aeronáutica, ITA, São Paulo dos Campos, SP, Brazil
Paper No:
GT2015-44080, V006T07A004; 10 pages
Published Online:
August 12, 2015
Citation
Bringhenti, C, Tomita, JT, Cavalca, DF, Monteiro, VG, & da Silva, OFR. "Study and Analysis of a Power Turbine Preliminary Design for a Small Turboshaft." Proceedings of the ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. Volume 6: Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy; Honors and Awards. Montreal, Quebec, Canada. June 15–19, 2015. V006T07A004. ASME. https://doi.org/10.1115/GT2015-44080
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