Jet impingement cooling in rotating flywheel energy storage systems: Turbulent flow reorganization and shear-layer dominated heat transfer enhancement

IF 6.1 2区工程技术 Q2 ENERGY & FUELS Applied Thermal Engineering Pub Date : 2025-03-14 DOI:10.1016/j.applthermaleng.2025.126238

Wenli Pan , Jianlong Ma , Qian Zhang , Hongjie Su

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引用次数: 0

Abstract

As an innovative energy storage technology, flywheel energy storage systems (FESS) have garnered substantial research interest in recent years, particularly regarding their thermal performance. Building upon previous studies and considering FESS operational characteristics, this investigation focuses on flow field dynamics induced by rotating jet cooling. Key findings includes: Rotation significantly diminishes the jet impingement effect on flow field patterns, with circumferential uniformity observed in Nusselt number(Nu), turbulent kinetic energy, and wall shear stress distributions, indicating consistent wall-adjacent heat transfer performance. Axial periodic fluctuations in velocity and turbulent kinetic energy emerge under jet impingement. Rotation speed exerts greater influence than coolant inlet velocity on near-wall flow field behavior. A persistent high-disturbance convolution layer near the rotating wall maintains constant thickness (4.55 mm), independent of rotation speed and coolant velocity parameters.

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来源期刊

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.