OPTIMIZATION STUDIES OF TRANSPIRATION COOLING USING POROUS MEDIUM WITH GRADUALLY-CHANGED STRUCTURE | Zendy

YaLing He | Zendy; Yu Chen | Zendy; Shen Du | Zendy; Dong Li | Zendy; Yang Gao | Zendy

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OPTIMIZATION STUDIES OF TRANSPIRATION COOLING USING POROUS MEDIUM WITH GRADUALLY-CHANGED STRUCTURE

Author(s) -

YaLing He,

Yu Chen,

Shen Du,

Dong Li,

Yang Gao

Publication year - 2020

Publication title -

frontiers in heat and mass transfer

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.404

H-Index - 18

ISSN - 2151-8629

DOI - 10.5098/hmt.15.19

Subject(s) - frontier , thermal fluids , porous medium , materials science , thermal , porosity , environmental science , thermodynamics , political science , thermal resistance , composite material , physics , law

Non-uniform heating and vapor blockage deteriorate the effectiveness of transpiration cooling, and an optimization method by using porous media with a gradually-changed structure is proposed. The numerical tool based on a two-phase mixture model and local thermal non-equilibrium assumption considering variable properties of coolant is applied. Porous media with linearly-changed porosity or particle diameter is analyzed. The transient results presented that the structure of gradually-changed porosity (or particle diameter) with appropriate parameters can delay the heat transfer deterioration. And it is confirmed that the present theoretical model is an effective tool for optimization design of transpiration cooling system.

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