Impact of tapered leading-edge micro-cylinder on the performance of wells turbine for wave energy conversion: CFD-optimization algorithms coupling study

被引：0

作者：

Kotb, Ahmed T. M. ^{[1
]}

Nawar, Mohamed A. A. ^{[1
]}

Attai, Youssef A. ^{[1
]}

Mohamed, Mohamed H. ^{[1
,2
]}

机构：

[1] Helwan Univ, Fac Engn EL Mattaria, Mech Power Engn Dept, POB 11718, Cairo, Egypt

[2] Umm Al Qura Univ, Coll Engn & Islamic Architecture, Mech Engn Dept, PO 5555, Mecca, Saudi Arabia

来源：

ENERGY | 2024年 / 293卷

关键词：

Response surface optimization; Wells turbines; Wave energy; Oscillating water column (OWC) converter; Tapered micro -cylinder; BLADE SWEEP; DESIGN; SIMULATION;

D O I：

10.1016/j.energy.2024.130648

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Oscillating water column-based Wells turbine is one of the potential possibilities for wave energy conversion. The early turbine stall caused an early performance loss, limiting the power produced and the operating range. The present work intends to boost the output power and operating range of the Wells turbine by using a tapered leading-edge micro-cylinder. This design is unique in that the micro-cylinder's diameter and its distance from the leading-edge change along the blade span. A response surface optimization technique based on computational fluid dynamics (CFD) is used to determine the optimal dimensions of the new design. Utilizing the optimal new design in the upgraded Wells turbine significantly increases power output and operating range, specifically by 78.13% and 33.33%, respectively. According to comprehensive flow analysis, the novel micro-cylinder design generates a pair of vortices that successfully reduce axial flow velocities close to the suction side across a sizable portion of the blade span. This, in turn, results in the postponement of flow separation towards the trailing edge.

引用

页数：18