Heat transfer and flow friction characteristics of dimple-type heat exchanger in axial piston pump
Source abstract
Abstract
The heat exchanger is widely applied to many axial piston machines, and its structure significantly affects the flow and heat transfer characteristics. The fluid flow and heat transfer characteristics of a dimple-type heat exchanger in the axial piston pump are numerically investigated. The variations of the Nusselt number, friction factor and heat transfer performance with the Reynolds number, and the dimple radius to depth are obtained. The results show that both the Nusselt number and the resistance coefficient of the spherical dimple channel are higher than those of the triangle dimple one. Thus, from the view of the heat transfer performance, the spherical dimple channel is better. Furthermore, the friction factor increases as the dimple radius to depth increases. With the increase in the dimple radius to depth ratio, the shear stress at the wall of the spherical dimpled channel gradually decreases and then reduces the wall friction resistance. Comparing with the triangle dimple channel, the friction factor in the spherical dimple channel is 0.044–0.022, which reduces about 9%. When the radius–depth ratio is set to 0.1, the effectiveness factor for the spherical dimpled channel has better performance.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Heat Transfer Mechanisms · Heat Transfer and Optimization · Heat transfer and supercritical fluids
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Mechanical and Electrical Engineering, Wenzhou University 1 , Wenzhou 325035, China
Zhejiang Linuo Flow Control Technology Co., Ltd. 2 , Wenzhou 325035, China
State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University 3 , Hangzhou 310027, China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province · State Key Laboratory of Fluid Power and Mechatronic Systems · Science and Technology Plan Project of Wenzhou, China
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Show source-provided references
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