Experimental Investigation on Effects of Trapezoidal Ribs on Heat Transfer Enhancement with Electrohydrodynamics Active Method into Duct

Document Type : Research Article

Author

دانشگاه شهیدمدنی آذربایجان-تبریز

Abstract

In this work, the heat transfer enhancement of trapezoidal ribs is investigated. Cooling of the three trapezoidal ribs has been achieved with electrohydrodynamicsactive method by experimental apparatus. The hydrodynamic and heat transfer behavior of air flow was studied by electrohydrodynamics active method. The aim of the present work is heat transfer enhancement with low pressure loss. In active method, two arrangements of wire electrodes have been applied. The results show that in the same Reynolds numbers and voltages of wire electrodes, the heat transfer was increased in arrangement 1 than arrangement 2. Density of electric charge around wire electrodes in arrangement 1 is higher than in arrangement 2. Therefore, arrangement 1 is better than arrangement 2. Arrangements 1 and 2 are different with the position of wire electrodes. With attention to results the power of corona wind in low Reynolds flows is higher than in high Reynolds flows, signifying that the corona wind in low Reynolds numbers is better than in high Reynolds numbers. In the same Reynolds numbers and voltages of wires, the average performance evaluation criteria were increased in arrangement 2 than arrangement 1.
 

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References

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AUT Journal of Mechanical Engineering
Volume 4, Issue 4
December 2020
Pages 493-504

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