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Effect of baffles geometry on heat transfer enhancement inside corrugated duct

The present work showed that the highest thermal performance factor under the same pumping power obtained from the experiments, is about 2.26 times more than that of plain duct. | Effect of baffles geometry on heat transfer enhancement inside corrugated duct International Journal of Mechanical Engineering and Technology IJMET Volume 10 Issue 03 March 2019 pp. 555-566. Article ID IJMET_10_03_057 Available online at http www.iaeme.com ijmet issues.asp JType IJMET amp VType 10 amp IType 3 ISSN Print 0976-6340 and ISSN Online 0976-6359 IAEME Publication Scopus Indexed EFFECT OF BAFFLES GEOMETRY ON HEAT TRANSFER ENHANCEMENT INSIDE CORRUGATED DUCT Jaafar Jaber Abdulhameed Dhamiaa Saad and Muna S. Kassim Department of Mechanical Engineering Faculty of Engineering Almustansiriyah University Iraq. ABSTRACT The turbulent heat transfer and friction inside a corrugated square duct inserted with various baffles geometries have been studied experimentally. Five types of baffles flat rectangular semicircular triangular and trapezoidal are attached on top and bottom walls of the duct. The effects of duct wavy surface baffle geometry baffle position and flow Reynolds number are examined. Air is used as the working fluid with Reynolds number ranged from 3442.6 to 17213.19 under constant wall heat flux. Experimental results show obtained for average Nusselt numbers and friction factor. The results indicate that the trapezoidal baffled geometry provides a higher thermal performance than the other type baffled one. The present work showed that the highest thermal performance factor under the same pumping power obtained from the experiments is about 2.26 times more than that of plain duct. Also it is found that the thermal performance of the baffles attach on the bottom wall of the duct is higher than the other baffles attach on the top. Key words Square duct Nusselt number Friction factor inclined baffles. Cite this Article Jaafar Jaber Abdulhameed Dhamiaa Saad and Muna S. Kassim Effect of Baffles Geometry on Heat Transfer Enhancement inside Corrugated Duct International Journal of Mechanical Engineering and Technology 10 3 2019 pp. 555-566. http www.iaeme.com