The investigation of groove geometry effect on heat transfer for internally grooved tubes
Özet
An experimental study of surface heat transfer and friction characteristics of a fully developed turbulent air flow in different grooved tubes is reported. Tests were performed for Reynolds number range 10,000-38,000 and for different geometric groove shapes (circular, trapezoidal and rectangular). The ratio of tube length-to-diameter is 33. Among the grooved tubes, heat transfer enhancement is obtained up to 63% for circular groove, 58% for trapezoidal groove and 47% for rectangular groove, in comparison with the smooth tube at the highest Reynolds number (Re = 38,000). Correlations of heat transfer and friction coefficient were obtained for different grooved tubes. In evaluation of thermal performance, it is seen that the grooved tubes are thermodynamically advantageous (Ns, a < 1) up to Re = 30,000 for circular and trapezoidal grooves and up to Re = 28,000 for rectangular grooves. It is observed that there is an optimum value of the entropy generation number at about Re = 17,000 for all investigated grooves. (C) 2008 Elsevier Ltd. All rights reserved.
Anahtar kelimeler
Atıf için künye
Bilen, K., Çetin, M., Gul, H., & Balta, T. (2009). The investigation of groove geometry effect on heat transfer for internally grooved tubes. APPLIED THERMAL ENGINEERING, 29, 753–761. https://doi.org/10.1016/j.applthermaleng.2008.04.008
BibTeX
@article{bilen2009-191737,
author = {Bilen, Kadir and Çetin, Murat and Gul, Hasan and Balta, Tuba},
title = {The investigation of groove geometry effect on heat transfer for internally grooved tubes},
journal = {APPLIED THERMAL ENGINEERING},
year = {2009},
volume = {29},
pages = {753--761},
issn = {1359-4311},
doi = {10.1016/j.applthermaleng.2008.04.008},
url = {https://akademik.atauni.edu.tr/yayinlar/191737-the-investigation-of-groove-geometry-effect-on-heat-transfer-for-internally}
}