A Computational Analysis of Flow Structure Through a Constant Area DS-Duct

A. K. Biswas(1*), Prasanta K. Sinha(2), A. N. Mullick(3), B. Majumdar(4)

(1) Department of Mechanical Engineering, National Institute of Technology, Durgapur – 713 212, India
(2) Department of Mechanical Engineering, Durgapur Institute of Advanced Technology & Mangt., Durgapur – 713 212, India
(3) Department of Mechanical Engineering, National Institute of Technology, Durgapur – 713 212, India
(4) Department of Power Engineering, Jadavpur University, Kolkata, India
(*) Corresponding author


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Abstract


In the present investigation the distribution of wall static pressure and mean velocity are experimentally studied on a DS-shape constant area rectangular curved duct of 22.5°/22,5°/22.5°/22.5° angle of turn with an aspect ratio of 2.0.  The experiment is carried out at mass averaged mean velocity of 40m/s. The velocity distribution shows the Bulk of flow shifting from wall-2 to wall-1 in the first bend and third bend of the duct and wall-1 to wall-2 in the second bend and forth bend of the duct along the flow passage of the DS-duct is very instinct. Flow at end of the DS-duct is psurely uniform in nature due to non existence of secondary motion. The experimental results then were numerically validated with the help of Fluent, and the comparison of experimental and predicted results for DS duct shows good quality agreement between the experimental and predicted results
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Keywords


Constant Area DS-Duct; Secondary Motion; Wall Pressure; K-Ε Model; Fluent Solver

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