SURFACE TEMPERATURE EFFECT ON CONVECTIVE HEAT TRANSFER COEFFICIENTS FOR JET IMPINGEMENT COOLING OF ELECTRIC MACHINES WITH AUTOMATIC TRANSMISSION FLUID

被引：0

作者：

Kekelia, Bidzina ^{[1
]}

Bennion, Kevin ^{[1
]}

Feng, Xuhui ^{[1
]}

Moreno, Gilberto ^{[1
]}

Cousineau, J. Emily ^{[1
]}

Narumanchi, Sreekant ^{[1
]}

Tomerlin, Jeff ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

PROCEEDINGS OF THE ASME INTERNATIONAL TECHNICAL CONFERENCE AND EXHIBITION ON PACKAGING AND INTEGRATION OF ELECTRONIC AND PHOTONIC MICROSYSTEMS, 2019 | 2020年

关键词：

Jet impingement; automatic transmission fluid; electric machines; electric motors; thermal management; LIQUID;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, the results of NREL's continued work on experimental characterization of the thermal performance of free-surface jets of automatic transmission fluid impinged on a heated target surface are presented. The measured heat transfer coefficients are useful for understanding factors influencing performance ofdrivelinefluid-based cooling systems for electric machines and help designers in developing high-performance, power-dense and reliable machines. Experiments were carried out for different fluid and target surface temperatures (50 C, 70 C, and 90 Cfor thefluid and 90 C, 100 C, 110 C, and 120 C for the target surface). Impinging jet velocities (0.5 m/s to 7.5 m/s) and the jet position on the target surface (center versus edge) were also varied. The impinging angle was kept at 90 relative to the target surface. It was found that higher target surface temperature increased heat transfer coefficients, namely, increasing surface temperature from 90 C to 120 C enhanced heat transfer coefficient values at higher impingedjet velocities (7.5 m/s) by up to 15%.

引用

页数：7

共 15 条

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