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Heat Transfer Research
Fator do impacto: 1.199 FI de cinco anos: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2017013603
pages 1263-1280

NUMERICAL SIMULATION OF FLOW CHARACTERISTICS INSIDE ROTATING DISK CAVITIES

Shuxian Chen
Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan 618307, China
Jingzhou Zhang
College of Energy and Power Engineering, Jiangsu Province Key Laboratory of Aerospace Power System, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Xiao-Ming Tan
College of Energy and Power Engineering, Jiangsu Province Key Laboratory of Aerospace Power System, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
Feng Yan
Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan 618307, China

RESUMO

Turbulent flows inside the shrouded rotating disk cavities without superposed flow and with central axial air inflow were studied numerically based on the finite volume method. The qualitative natures of the gap-view flow structures between two rotating coaxial disks in a relatively wide range of rotational conditions were presented. The theory of rotating fluids in the presence of centrifugal and Coriolis forces stemming from the disk rotation was employed to manifest the mechanisms underlying the formation of these flow structures. Results were obtained for cases of corotation at the same speed, rotor–stator, counterrotation, and counterrotation with central axial air inflow. For the shrouded rotating disk cavities without superposed flow, the flow structure is strongly influenced by the rotational forces and viscous force exerted on the fluid particles in various conditions. When the central axial air inflow is superimposed, the flow structure is found to be strongly affected by the interaction of the rotational forces and inertial force. The present work provides profound insights into the flow structure and the related mechanisms in rotating disk systems.


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