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Development of turbine blade profiles using iterative inverse design methodology
Published in American Society of Mechanical Engineers
2017
Volume: 1
   
Abstract
An iterative inverse design methodology is used to design gas turbine blades for the prescribed flow conditions. The input flow parameter considered here is the pressure distribution along the suction and pressure surfaces of the blade. The flow is regarded as inviscid. A guess blade is presumed and the flow analysis over the blade is determined using the existing commercial software. In case of mismatch of the flow parameters, the guessed profile surface is considered as a permeable membrane and the normal velocity on the blade surface is computed by conservation of momentum flux approach. The computed normal velocity is used to revise the blade geometry by mass conservation principle till the flow parameters converge. A few geometric constraints are enforced on the model to avoid quixotic blade model. The validation of the above method is being done using NACA profiles. The robustness of the method is verified by using various combinations of NACA blade profiles, where different initial guessed profiles are taken for the same prescribed pressure distribution. This approach can be extended to three dimensional cases.To incorporate the complications attached with the three dimensional flows, three two dimensional sections can be considered on the blade geometry namely at hub, mid span and tip. Copyright © 2017 ASME.
About the journal
JournalASME 2017 Gas Turbine India Conference, GTINDIA 2017
PublisherAmerican Society of Mechanical Engineers
Open AccessNo
Concepts (17)
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    Design
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    Gas turbines
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    Geometry
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    Heat transfer
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    Inverse problems
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    Iterative methods
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    Pressure distribution
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    TURBINE COMPONENTS
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    CONSERVATION OF MOMENTUM
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    GEOMETRIC CONSTRAINT
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    INVERSE DESIGN METHODOLOGY
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    INVERSE DESIGNS
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    PERMEABLE MEMBRANES
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    Three-dimensional flow
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    Turbine blade
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    TWO DIMENSIONAL SECTION
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    Turbomachine blades