Enhanced heat transfer of heat-exchange equipment by pulsating air flow
Journal Title: Бюллетень науки и практики - Year 2018, Vol 4, Issue 10
Abstract
This paper designs a pulsating generator to provide pulsating air flow for experiments the relationship between the average flow velocity, pulse and pulsation amplitude and the pulsating flow enhancement heat transfer ratio was discussed respectively. The characteristics of the pulsating flow enhanced heat transfer were analyzed, and the academic research and engineering application of pulsating heat transfer were proposed. This inevitably has an optimal pulsating frequency value at which the maximum vortex generation can be obtained within one pulsation cycle to obtain maximum heat transfer effect, for example, in this experiment; the optimal frequency is 1–1.25 Hz. The effect of Reynolds number Re on the low-frequency pulsation convection heat transfer process is that the low-frequency pulsation can only enhance the convective heat transfer within a certain range of Reynolds numbers. If it exceeds this range, the convective heat transfer is weakened.
Authors and Affiliations
Y. Jin, A. Levtsev
Keywords
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- EP ID EP487392
- DOI 10.5281/zenodo.1461973
- Views 109
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