Performance enhancement of Wells turbine: Combined radiused edge blade tip, static extended trailing edge, and variable thickness modifications

被引：30

作者：

Kumar, P. Madhan ^{[1
]}

Haider, Paresh ^{[1
,2
]}

Husain, Afzal ^{[3
]}

Samad, Abdus ^{[1
]}

机构：

[1] IIT Madras, Wave Energy & Fluids Engn Lab, Ocean Engn Dept, Chennai 600036, Tamil Nadu, India

[2] Okinawa Inst Sci & Technol Grad Univ, Quantum Wave Microscopy Unit, 1919-1 Tancha, Onna Son, Okinawa 9040495, Japan

[3] Sultan Qaboos Univ, Dept Mech & Ind Engn, POB 33, Muscat 123, Oman

来源：

OCEAN ENGINEERING | 2019年 / 185卷

关键词：

Wells turbine; Radiused edge tip blade; Static extended trailing edge; Wave energy; WAVE ENERGY-CONVERSION; AIR TURBINE; DESIGN; OPTIMIZATION; CLEARANCE; GEOMETRY;

D O I：

10.1016/j.oceaneng.2019.05.041

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

The Wells turbine is used in conjunction with an oscillating water column to harvest wave energy. It is a self-rectifying axial flow reaction turbine which consists of symmetrical blades aligned normal to the incoming flow. A narrow operating range due to flow separation restricts the power extracting capability of the turbine at a higher flow rate. To improve its performance, a turbine blade with combined design modifications such as radiused edge blade (RED) tip, static extended trailing edge (SETE) and variable thickness blade (VTB) was investigated through CFD analysis. Three-dimensional time independent Reynolds-averaged Navier-Stokes equations were solved in a commercial solver to obtain the turbine performance, which was given by non-dimensional torque, pressure drop and efficiency. The combined REB tip, SETE and VTB modifications enhanced relative average turbine power output by 97% and the relative operating range by 22%. However, the average efficiency is decreased by 7.7%, because of the increased pressure drop.

引用

页码：47 / 58

页数：12

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