Heat transfer characteristics of pulsated turbulent pipe flow |
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| Authors: | M A Habib S A M Said A A Al-Farayedhi S A Al-Dini A Asghar S A Gbadebo |
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| Institution: | (1) Mechanical Engineering Department King Fahd University of Petroleum and Minerals Dhahran 31261, Saudi Arabia, SA |
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| Abstract: | Heat Transfer characteristics of pulsated turbulent pipe flow under different conditions of pulsation frequency, amplitude
and Reynolds number were experimentally investigated. The pipe wall was kept at uniform heat flux. Reynolds number was varied
from 5000 to 29 000 while frequency of pulsation ranged from 1 to 8 Hz. The results show an enhancement in the local Nusselt
number at the entrance region. The rate of enhancement decreased as Re increased. Reduction of heat transfer coefficient was
observed at higher frequencies and the effect of pulsation is found to be significant at high Reynolds number. It can be concluded
that the effect of pulsation on the mean Nusselt numbers is insignificant at low values of Reynolds number.
Received on 29 June 1998 |
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