Abstract
The present paper has investigated the effects of fin on the flow and heat/mass transfer characteristics for the impingement/effusion cooling with crossflow. The fins of circular or rectangular shape are installed between two perforated plates and the crossflow passes between these two plates. The blowing ratio is changed from 0.5 to 1.5 for a fixed jet Reynolds number of 10,000. A naphthalene sublimation method is used to obtain the local heat/mass transfer coefficients on the effusion plate. A numerical calculation is also performed to investigate the flow characteristics. Flow and heat/mass transfer characteristics are changed significantly due to installation of fins. In the injection region, wall jet spreads more widely than the case without fins because fin prevents the wall jet from being swept away by the crossflow. In the effusion region, higher heat/mass transfer coefficient is obtained due to the flow disturbance and acceleration by the fin. As the blowing ratio increases, the effects of fin against the crossflow become more significant and then the higher average heat/mass transfer coefficients are obtained. Especially, the cases with rectangular fins have about 40%-45% enhancement at the high blowing ratio of M=1.5. However, the increase of blockage effect gives more pressure loss in the channel.
| Original language | English |
|---|---|
| Pages | 1325-1337 |
| Number of pages | 13 |
| DOIs | |
| Publication status | Published - 2005 Nov 23 |
| Event | ASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future - Reno-Tahoe, NV, United States Duration: 2005 Jun 6 → 2005 Jun 9 |
Other
| Other | ASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future |
|---|---|
| Country | United States |
| City | Reno-Tahoe, NV |
| Period | 05/6/6 → 05/6/9 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
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Effects of fin shapes and arrangements on heat transfer for impingement/effusion cooling with crossflow. / Hong, Sung Kook; Rhee, Oong Ho; Cho, Hyung Hee.
2005. 1325-1337 Paper presented at ASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future, Reno-Tahoe, NV, United States.Research output: Contribution to conference › Paper
TY - CONF
T1 - Effects of fin shapes and arrangements on heat transfer for impingement/effusion cooling with crossflow
AU - Hong, Sung Kook
AU - Rhee, Oong Ho
AU - Cho, Hyung Hee
PY - 2005/11/23
Y1 - 2005/11/23
N2 - The present paper has investigated the effects of fin on the flow and heat/mass transfer characteristics for the impingement/effusion cooling with crossflow. The fins of circular or rectangular shape are installed between two perforated plates and the crossflow passes between these two plates. The blowing ratio is changed from 0.5 to 1.5 for a fixed jet Reynolds number of 10,000. A naphthalene sublimation method is used to obtain the local heat/mass transfer coefficients on the effusion plate. A numerical calculation is also performed to investigate the flow characteristics. Flow and heat/mass transfer characteristics are changed significantly due to installation of fins. In the injection region, wall jet spreads more widely than the case without fins because fin prevents the wall jet from being swept away by the crossflow. In the effusion region, higher heat/mass transfer coefficient is obtained due to the flow disturbance and acceleration by the fin. As the blowing ratio increases, the effects of fin against the crossflow become more significant and then the higher average heat/mass transfer coefficients are obtained. Especially, the cases with rectangular fins have about 40%-45% enhancement at the high blowing ratio of M=1.5. However, the increase of blockage effect gives more pressure loss in the channel.
AB - The present paper has investigated the effects of fin on the flow and heat/mass transfer characteristics for the impingement/effusion cooling with crossflow. The fins of circular or rectangular shape are installed between two perforated plates and the crossflow passes between these two plates. The blowing ratio is changed from 0.5 to 1.5 for a fixed jet Reynolds number of 10,000. A naphthalene sublimation method is used to obtain the local heat/mass transfer coefficients on the effusion plate. A numerical calculation is also performed to investigate the flow characteristics. Flow and heat/mass transfer characteristics are changed significantly due to installation of fins. In the injection region, wall jet spreads more widely than the case without fins because fin prevents the wall jet from being swept away by the crossflow. In the effusion region, higher heat/mass transfer coefficient is obtained due to the flow disturbance and acceleration by the fin. As the blowing ratio increases, the effects of fin against the crossflow become more significant and then the higher average heat/mass transfer coefficients are obtained. Especially, the cases with rectangular fins have about 40%-45% enhancement at the high blowing ratio of M=1.5. However, the increase of blockage effect gives more pressure loss in the channel.
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UR - http://www.scopus.com/inward/citedby.url?scp=27744439785&partnerID=8YFLogxK
U2 - 10.1115/GT2005-68684
DO - 10.1115/GT2005-68684
M3 - Paper
AN - SCOPUS:27744439785
SP - 1325
EP - 1337
ER -