Thermo-Hydraulic Performance of a Rectangular Duct With Staggered Inclined Discrete Rib Arrangement
Mukesh Kumar Solanki1, K. R. Aharwal2

1Mukesh Kumar Solanki, Research Scholar, Department of Mechanical Engineering, Maulana Azad National Institute of Technology, Bhopal, Madhya Pradesh, India.
2Dr. K. R. Aharwal, Professor, Department of Mechanical Engineering, Maulana Azad National Institute of Technology (MANIT), Bhopal, Madhya Pradesh, India.

Manuscript received on October 12, 2019. | Revised Manuscript received on 22 October, 2019. | Manuscript published on November 10, 2019. | PP: 1654-1658 | Volume-9 Issue-1, November 2019. | Retrieval Number: A4697119119/2019©BEIESP | DOI: 10.35940/ijitee.A4697.119119
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Abstract: Artificial roughness in the form of ribs is a beneficial strategy to improve the thermal performance of solar air heaters (SAHs). In the present research work, experimental examinations have been conducted on heat transfer and friction characteristics in the rectangular channel, which is roughened through the inclined discrete ribs. The inclined ribs were discretized by creating gaps at the different positions (not inline) on trailing and leading edges in consecutive ribs The rib roughness has relative roughness pitch as 8.0, rib combination of relative gap position is varied from 0.3 & 0.1 to 0.3 & 0.4, and mass flow rate varies between 3000 -14,000 and rib gap width as 1. The higher improvement in the Nusselt number and factor of friction coefficient is obtained to be 2.92 and 3.33 times respectively, as compared with that of the smooth duct. The higher thermo-hydraulic performance parameter (THPP) is obtained for the combination of relative gap position of 0.3 & 0.3.
Keywords:  Combination of Relative Gap Position, Friction Factor, Gap Width, Nusselt Number, Reynolds Number, and Thermo Hydraulic performance (THP).
Scope of the Article: Hydraulic Engineering