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    Aerothermal Optimization of Bladeless Turbines

    Source: Journal of Engineering for Gas Turbines and Power:;2021:;volume( 143 ):;issue: 003::page 031023-1
    Author:
    Braun, James
    ,
    Paniagua, Guillermo
    ,
    Falempin, Francois
    DOI: 10.1115/1.4049355
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The harnessing of mechanical power from supersonic flows is constrained by physical limitations and substantial aerodynamic losses. Bladeless axial turbines are a viable alternative to extract power in such harsh conditions without restricting the operating conditions. In this paper, we present a shape optimization of the wavy surface of bladeless turbines to maximize the power extraction, while minimizing convective heat flux and pressure losses. First, a baseline geometry was defined and an experimental campaign was carried out on the baseline wavy surface of the bladeless turbine at supersonic conditions. Pressure, heat flux, and skin friction measurements were compared with the Reynolds averaged Navier–Stokes results. Afterward, an evaluation routine which consisted of the geometry and grid generation, solving, and postprocessing was implemented within a multi-objective optimization routine to maximize the pressure force and minimize heat flux and pressure loss. Finally, a three-dimensional assessment in terms of power, heat load, and pressure drop was performed for the best performing geometry with the commercial solver cfd++ of Metacomp.
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      Aerothermal Optimization of Bladeless Turbines

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4277358
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    • Journal of Engineering for Gas Turbines and Power

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    contributor authorBraun, James
    contributor authorPaniagua, Guillermo
    contributor authorFalempin, Francois
    date accessioned2022-02-05T22:20:09Z
    date available2022-02-05T22:20:09Z
    date copyright3/1/2021 12:00:00 AM
    date issued2021
    identifier issn0742-4795
    identifier othergtp_143_03_031023.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4277358
    description abstractThe harnessing of mechanical power from supersonic flows is constrained by physical limitations and substantial aerodynamic losses. Bladeless axial turbines are a viable alternative to extract power in such harsh conditions without restricting the operating conditions. In this paper, we present a shape optimization of the wavy surface of bladeless turbines to maximize the power extraction, while minimizing convective heat flux and pressure losses. First, a baseline geometry was defined and an experimental campaign was carried out on the baseline wavy surface of the bladeless turbine at supersonic conditions. Pressure, heat flux, and skin friction measurements were compared with the Reynolds averaged Navier–Stokes results. Afterward, an evaluation routine which consisted of the geometry and grid generation, solving, and postprocessing was implemented within a multi-objective optimization routine to maximize the pressure force and minimize heat flux and pressure loss. Finally, a three-dimensional assessment in terms of power, heat load, and pressure drop was performed for the best performing geometry with the commercial solver cfd++ of Metacomp.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleAerothermal Optimization of Bladeless Turbines
    typeJournal Paper
    journal volume143
    journal issue3
    journal titleJournal of Engineering for Gas Turbines and Power
    identifier doi10.1115/1.4049355
    journal fristpage031023-1
    journal lastpage031023-11
    page11
    treeJournal of Engineering for Gas Turbines and Power:;2021:;volume( 143 ):;issue: 003
    contenttypeFulltext
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