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Journal ArticleDOI

Numerical study of turbulent flow over an S-shaped hydrofoil

T Micha Prem Kumar, +1 more
- Vol. 222, Iss: 9, pp 1717-1734
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In this paper, a numerical study of turbulent flow over the S-shaped hydrofoil at 0° angle of attack has been reported, where the flow takes place over concave and convex surfaces and is accompanied by the favorable and adverse pressure gradients and flow separation.
Abstract: 
In this paper, a numerical study of turbulent flow over the S-shaped hydrofoil at 0° angle of attack has been reported. Here, the flow takes place over concave and convex surfaces and is accompanied by the favourable and adverse pressure gradients and flow separation. Modelling such a flow poses a formidable challenge. In the present work four turbulence models, namely, k–∊ realizable, k–ω shear stress transport

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Citations
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Journal ArticleDOI

Influence of duct geometry on the performance of Darrieus hydroturbine

Abhilash Reddy Malipeddi, +1 more
- 01 Jul 2012 - 
TL;DR: In this article, a new duct is developed for a given turbine design, that reduces the variation in torque over a cycle by appropriately directing the flow upstream and downstream the turbine while increasing power conversion.
Journal ArticleDOI

Numerical investigation of the effect of geometry on the performance of a jet pump

R Mallela, +1 more
TL;DR: The efficiency of jet pump is poor and it usually has a sharp peak in the efficiency-discharge ratio curve as mentioned in this paper, which is undesirable for the purpose of transporting materials in the air.
Journal ArticleDOI

Cavitation Characteristics of S-Blade Used in Fully Reversible Pump-Turbine

T. M. Premkumar, +2 more
- 01 May 2014 - 
Journal ArticleDOI

Computational analysis of flow over a cascade of S-shaped hydrofoil of fully reversible pump-turbine used in extracting tidal energy

T Micha Premkumar, +1 more
- 01 May 2015 - 
TL;DR: In this paper, a numerical investigation of flow over a cascade of S-shaped hydrofoils is presented, and it is found from numerical simulations that the useful range of operation is restricted to 6° for turbine operation and −6° for pump operation.
Journal ArticleDOI

The effect of convex wall curvature on the structure of the turbulent boundary layer

Abdolamir Bak Khoshnevis, +2 more
TL;DR: In this article, the effects of convex wall curvature on turbulent boundary layer flow were studied using a numerical method using the non-linear k−e model often used in engineering applications.
References
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Journal ArticleDOI

Two-equation eddy-viscosity turbulence models for engineering applications

Florian R. Menter
- 01 Aug 1994 - 
TL;DR: In this paper, two new two-equation eddy-viscosity turbulence models are presented, which combine different elements of existing models that are considered superior to their alternatives.
Journal ArticleDOI

Modelling the pressure-strain correlation of turbulence - An invariant dynamical systems approach

Charles G. Speziale, +2 more
- 01 Jun 1991 - 
TL;DR: In this paper, the authors examined the modeling of the pressure-strain correlation of turbulent flows from a basic theoretical standpoint with a view toward developing improved second-order closure models and proved that for plane homogeneous turbulent flows the equilibrium structure of this hierarchy of models is encapsulated by a relatively simple model which is only quadratically nonlinear in the anisotropy tensor.
Journal ArticleDOI

Separated flow computations with the k-e-v2 model

Paul A. Durbin
- 01 Apr 1995 - 
TL;DR: In this article, the k-e-v2 model is used to predict the time-averaged properties of bluff body flow, which is necessary to resolve the coherent vortex shedding.
Journal ArticleDOI

The structure of a separating turbulent boundary layer. Part 1. Mean flow and Reynolds stresses

Roger L. Simpson, +2 more
- 01 Dec 1981 - 
TL;DR: In this paper, a two-dimensional, separating turbulent boundary layer for an airfoil-type flow in which the flow was accelerated and then decelerated until separation is presented.
Journal ArticleDOI

Dynamics and statistics of heavy particles in turbulent flows

Massimo Cencini, +7 more
- 01 Jan 2006 - 
TL;DR: In this paper, direct numerical simulations of turbulent flows seeded with millions of passive inertial particles are presented, where the maximum Reynolds number is Re λ∼ 200 and the acceleration fluctuations as a function of the Stokes number in the range St ∈ [0.16:3].