Effect of baffles on heat transfer characteristics of improved plane elastic tube bundle heat exchanger

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (10) : 51-57.

ZHANG Jingwei1，JI Jiadong1，PAN Yuling1，CHEN Qinghua1，LI Feiyang2

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Abstract

Based on the traditional plane elastic tube bundle (PETB) heat exchanger and structural improvement, an improved PETB heat exchanger was proposed. The effect of baffle structural parameters (height and radian) on heat transfer performance of improved PETB heat exchanger were studied. The results show that with the increase of baffle height, the vibration intensity of internal heat transfer components decreases, the vibration reinforced heat transfer property of heat transfer components and the overall heat transfer property of heat exchanger improve. When the scale factor from 0.70 to 0.80, the vibration amplitude of the monitoring point decreases over 7%. The average Nusselt number of components raised by 5.50% and the performance evaluation criteria PEC raised by 1.42% under vibration condition. The variation of the radian of the baffle plate affects the vibration intensity and heat transfer performance of the heat transfer element. When the radian of the baffle is 10°, the vibration of the monitoring point is the most intense, the reinforced heat transfer property of components and the overall heat transfer property of heat exchanger are the greatest. By contrast with radian 0° and 20°, the amplitude of monitoring point increased by 6.27% and 6.63%, separately. The average Nusselt number of components under vibration condition increased by 2.91% and 2.78% separately, and the PEC increased by 0.83% and 3.23% separately.

Key words

plane elastic tube bundle / heat exchanger / baffle / vibration enhanced heat transfer;

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ZHANG Jingwei1，JI Jiadong1，PAN Yuling1，CHEN Qinghua1，LI Feiyang2. Effect of baffles on heat transfer characteristics of improved plane elastic tube bundle heat exchanger[J]. Journal of Vibration and Shock, 2023, 42(10): 51-57

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