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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Jung, Eui Yeop Park, Chan Ung Lee, Dong Hyun Kim, Kyung Min Woo, Ta-Kwan Cho, Hyung Hee |
| Copyright Year | 2012 |
| Abstract | This study investigated the heat transfer characteristics of an array jet cooling system on a concave surface. Two types of injection holes were used: one for impinging jets normal to the impingement surface, and the other for angled impinging jets. For the normal jets, the jet Reynolds number (Re) based on the hole diameter varied from 3,000 to 10,000, and the height-to-diameter ratio (H/d) was fixed at 1.0. There were 15 injection holes positioned in a staggered 3×5 array. For the angled jets, Re was set to 5,000 and H/d was also fixed at 1.0. Naphthalene sublimation method was used to determine the heat transfer coefficients on the targeted plates. For normal impinging jet cooling, separate peaks were observed at the stagnation regions due to the curvature effect. Since a crossflow was generated by air spent from the jet arrays, the crossflow effect increased as it moved downstream. Due to the interaction between the crossflow and impinging jets, the peak values at the stagnation points increased downstream. The heat transfer coefficient on the targeted plate increased with Re. The average Sh of the angled jets was higher than that of the normal jets, as the obliquely impinging jet increased the mass flow rate and mass interaction between the jet impingement points. |
| Sponsorship | International Gas Turbine Institute |
| Starting Page | 601 |
| Ending Page | 607 |
| Page Count | 7 |
| File Format | |
| ISBN | 9780791844700 |
| DOI | 10.1115/GT2012-69566 |
| Volume Number | Volume 4: Heat Transfer, Parts A and B |
| Conference Proceedings | ASME Turbo Expo 2012: Turbine Technical Conference and Exposition |
| Language | English |
| Publisher Date | 2012-06-11 |
| Publisher Place | Copenhagen, Denmark |
| Access Restriction | Subscribed |
| Subject Keyword | Cooling Ducts Reynolds number Plates (structures) Jets Cooling systems Heat transfer coefficients Flow (dynamics) Heat transfer |
| Content Type | Text |
| Resource Type | Article |
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