Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)
- Volume 10 Issue 6
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- Pages.743-752
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- 1998
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- 1229-6422(pISSN)
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- 2465-7611(eISSN)
A study of single-phase liquid cooling by multiple nozzle impingement on the smooth and extended surfaces
다중노즐에 의해 분사된 평면 및 확장면의 단상액체냉각에 관한 연구
Abstract
Experiments were performed to characterize single-phase heat transfer behavior of submerged liquid jet with multiple nozzle normally impinging on the smooth and extended surfaces. Arrays of 9 and 36 nozzles were used, with diameters of 0.5 to 2.0mm providing nozzle area ratio (AR) from 0.05 to 0.2. The square pin fin arrays were chosen as extended surfaces and the effects of geometrical parameters such as fin height, the ratio of fin width to channel width on heat transfer enhancement were examined. Single nozzle characteristics were also evaluated for comparison. The results clearly showed that heat transfer enhancement could be realized by using multiple nozzles at the constant volume flow rate. The average Nusselt number of multiple nozzle impingement on the smooth surface was correlated by the following equation : Nu/
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