TY - GEN
T1 - Effect of blockage ratio on heat transfer enhancement in a channel by flow pulsation
AU - Ji, Tae Ho
AU - Hyun, Jae Min
AU - Kim, Seo Young
AU - Rhee, Gwang Hoon
PY - 2007
Y1 - 2007
N2 - Experiments are performed to investigate heat transfer enhancement from a heated square cylinder in a channel by pulsating flow. For all the experiments, the amplitude of the pulsating flow is fixed at A = 0.05. The effects of the pulsating frequency (0 Hz < fp < 60 Hz) and the blockage ratio of the square cylinder (ß = 1/10, 1/8, and 1/6) on convective heat transfer are examined. The "lock-on" phenomenon is clearly observed for a square cylinder in the present flow pulsation. The influence of blockage ratio on heat transfer enhancement is examined. The experimental results show that as the blockage ratio decreases, the heat transfer enhancement is more pronounced and lock-on regime broadens.
AB - Experiments are performed to investigate heat transfer enhancement from a heated square cylinder in a channel by pulsating flow. For all the experiments, the amplitude of the pulsating flow is fixed at A = 0.05. The effects of the pulsating frequency (0 Hz < fp < 60 Hz) and the blockage ratio of the square cylinder (ß = 1/10, 1/8, and 1/6) on convective heat transfer are examined. The "lock-on" phenomenon is clearly observed for a square cylinder in the present flow pulsation. The influence of blockage ratio on heat transfer enhancement is examined. The experimental results show that as the blockage ratio decreases, the heat transfer enhancement is more pronounced and lock-on regime broadens.
UR - http://www.scopus.com/inward/record.url?scp=43449121550&partnerID=8YFLogxK
U2 - 10.1115/HT2007-32316
DO - 10.1115/HT2007-32316
M3 - Conference contribution
AN - SCOPUS:43449121550
SN - 0791842746
SN - 9780791842744
T3 - 2007 Proceedings of the ASME/JSME Thermal Engineering Summer Heat Transfer Conference - HT 2007
SP - 137
EP - 142
BT - 2007 Proceedings of the ASME/JSME Thermal Engineering Summer Heat Transfer Conference - HT 2007
T2 - 2007 ASME/JSME Thermal Engineering Summer Heat Transfer Conference, HT 2007
Y2 - 8 July 2007 through 12 July 2007
ER -