Positive impact of vibration on heat transfer in twisted tape inserted heat exchanger
| Autor: | Govinda Rao Budda, Shanmukh Sudhir Arasavelli, Ramakrishna Konijeti |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Heat transfer enhancement Energy Engineering and Power Technology Building and Construction Mechanics Nusselt number Vibration Termodinamik Heat exchanger Heat transfer Heat exchanger Counter flow Heat transfer enhancement Nusselt number Vibration Twisted tape insert Thermodynamics Counter flow |
| Zdroj: | Volume: 7, Issue: 7 1731-1742 Journal of Thermal Engineering |
| ISSN: | 2148-7847 |
| Popis: | This paper describes experimental investigations on convective heat transfer in counter flow double pipe heat exchanger under transverse vibration for single-phase flow with twisted tape insert in the inner tube. Experiments were conducted on twisted tape inserted counter flow double pipe heat exchanger under vibration for twist ratio from 7 to 17, amplitude from 23 to 69 mm, frequency from 20 to 100 Hz and Reynolds number (Re) changing from 10710 to 21420. A maximum gain of 91% in Nusselt number (Nu) was obtained at 40 Hz frequency and 69 mm amplitude for twist ratio of 7 and Re of 10710. The maximum value of performance evaluation criteria with compound enhancement technique on double pipe heat exchanger reached 1.38 in turbulent flow conditions. Empirical correlations for Nu were developed and predicted values were found to be within ± 9% of experimental values for both frequency ranges. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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