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1.025
Q1(Year 2015)
ISSN : 1026-3098
e-ISSN : 2345-3605
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Publication Information : Volume 23 - Number 5 - Successive Number 5
Type : Article
Topics of Paper : Transaction on Mechanical Engineering
English Title : Conceptual duct shape design for horizontal-axis hydrokinetic turbines
English Abstract : In the present paper, conceptual duct shape design for kinetic energy extraction with hydrokinetic turbines is discussed. The goal is to nd a single-passage axisymmetric geometry that holds stable flow with maximum kinetic energy ux at duct throat. For nding the optimum duct shape, the fluid flow was numerically simulated in a wedge shaped space with Flow-Simulation Software. In a multi-stage conceptual design, tabulated con gurations were employed to study each geometrical characteristic separately. These include curvature of pro le camber, trailing edge shape, pro le tip shape, and duct exit cross sectional area. The revolved pro le of each duct consists of a well constrained composite curve with few degrees of freedom. The Sketcher environment of SolidWorks Software provides a feasible method of rebuilding constrained curves. Duct shape optimization was performed based on successive flow simulation and approximation of optimum geometric dimension at optimum flow condition. The drag coecients were compared with available experiments. Based on the numerical simulations with needle shaped leading edge, the duct throat velocity can be increased. Inversely, the flow blockage can reduce the kinetic energy flux at duct throat. The optimum duct shape has shown the greatest frictional drag coecient and the minimum flow separation.
English Keywords : Axisymmetric duct; Conceptual design; Eddy; Hydrokinetic turbine; Isothermal cavitation.
Refrences :
Number Of Pages :
From 2113 to 2124


Authors :
The AuthorAuthor SequenceOrganizationOrganization ( english )AffiliationEmailEducation
A. Zahedi Nejad 1Department of Mechanical and Aerospace Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.    
M. Rad 2Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.    
M. Khayat
(Author)
3Department of Mechanical and Aerospace Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.    
Published Issues
2017
Transactions on Civil Engineering
Transactions on Mechanical Engineering
Transactions on Chemistry and Chemical Engineering
Transactions on Computer Science & Engineering and Electrical Engineering
Transactions on Industrial Engineering
Transactions on Nanotechnology
2016
2015
Transactions on Civil Engineering
Transactions on Mechanical Engineering
Transactions on Chemistry and Chemical Engineering
Transactions on Computer Science & Engineering and Electrical Engineering
Transactions on Industrial Engineering
Transactions on Nanotechnology
2014
Transactions on Civil Engineering
Transactions on Mechanical Engineering
Transactions on Chemistry and Chemical Engineering
Transactions on Computer Science & Engineering and Electrical Engineering
Transactions on Industrial Engineering
Transactions on Nanotechnology
2013
Transactions on Civil Engineering
Transactions on Mechanical Engineering
Transactions on Chemistry and Chemical Engineering
Transactions on Computer Science & Engineering and Electrical Engineering
Transactions on Industrial Engineering
Transactions on Nanotechnology

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