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research-article

The Effect of Mid-Plane Guide Vanes in a Biplane Wells Turbine

[+] Author and Article Information
Tapas Kumar Das

Wave Energy and Fluids Engineering Lab (WEFEL), IIT Madras, Ocean Engineering Dept., IIT Madras, Chennai-600036, India
mech.tapas@gmail.com

Abdus Samad

Wave Energy and Fluids Engineering Lab (WEFEL), IIT Madras, Ocean Engineering Dept., IIT Madras, Chennai-600036, India
samad@iitm.ac.in

1Corresponding author.

ASME doi:10.1115/1.4041600 History: Received May 08, 2018; Revised September 24, 2018

Abstract

Guide vanes improve the performance of a turbine in terms of efficiency, torque or operating range. In this work, a concept of different orientations of guide vanes in between a two-row biplane Wells turbine was introduced and analyzed for the performance improvement. The fluid flow was simulated numerically with a commercial software Ansys CFX 16.1. The Reynolds-averaged Navier-Stokes equations with the k-? turbulence closure model were solved for different designs and flow conditions. It was found that the base model flow simulation approximates well to match the experimental data. Among the designs, the inline blade configuration and guide vane concave side to leading edge performed relatively better, still, it was less performing than the base model. The reason behind the reduction in performance from the base model is attributed to the blockage of flow and the change of flow path occurring due to the presence of the mid-plane guide vanes. The flow analysis of different cases and comparison with the base model is presented in the current study.

Copyright (c) 2018 by ASME
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