GAO Xiang, LUO Zhongyang, ZHOU Jinsong, et al. HEAT TRANSFER ENHANCEMENT CHARACTERISTICS OF NON-DECAYING SWIRL FLOW DUE TO SPIRAL FIN[J]. CIESC Journal, 2003, (9): 1205-1208.
GAO Xiang, LUO Zhongyang, ZHOU Jinsong, et al. HEAT TRANSFER ENHANCEMENT CHARACTERISTICS OF NON-DECAYING SWIRL FLOW DUE TO SPIRAL FIN[J]. CIESC Journal, 2003, (9): 1205-1208.DOI:
The heat transfer enhancement and flow resistance characteristics of non-decaying swirl flow formed by a spiral fin tube is investigated experimentally in this paper. The effects of non-decaying swirl flow
decaying swirl flow and non-swirl flow on heat transfer and resistance characteristics are also compared and analyzed. The experimental results indicate that heat transfer coefficient of non-decaying swirl flow increases by 60%~80% compared with non-swirl flow and by 49% compared with decaying swirl flow
but the pressure drop of non-decaying swirl flow is obviously higher than that of decaying swirl flow and non-swirl flow. The analysis results show that the comprehensive thermal property of non-decaying swirl flow is better than that of decaying swirl flow at a low Re
when Re is larger than a critical value (Re=1.8×104 in this experiment) the decaying swirl flow is better.