Energy harnessing of multiple semi-active flapping ellipses in V-shape formation-Reference-Cited by-同舟云学术

Energy harnessing of multiple semi-active flapping ellipses in V-shape formation

Published:2022-12 Issue:12 Volume:34 Page:123608
ISSN:1070-6631
Container-title:Physics of Fluids
language:en
Short-container-title:Physics of Fluids

Author:

Gong Lingyun¹^ORCID,Zhu Hongbo¹^ORCID,Huan Caiyun²,Bao Yan¹^ORCID,Zhou Dai¹³⁴^ORCID,Han Zhaolong¹^ORCID,Ng Bing Feng⁵^ORCID

Affiliation:

1. Department of Civil Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

2. PowerChina Huadong Engineering Corporation Limited, Hangzhou 311122, China

3. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

4. Key Laboratory of Hydrodynamics of Ministry of Education, Shanghai 200240, China

5. School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798

Abstract

Two-dimensional numerical simulations based on an immersed boundary method are performed for the two-foil system with varying spacings, and a staggered arrangement with a spacing normalized by chord length [Formula: see text] is found to be the most favorable for energy harnessing with the efficiency enhancement of nearly 40% for the downstream foil. By scrutinizing the mean flow characteristics and the instantaneous wake dynamics, it is revealed that convective flow acceleration and vortex impingement in synchronized timing with foil motion are the two primary mechanisms that contribute to significant efficiency improvement. Based on the staggered arrangement for the two-foil system, a V-shape formation is further proposed for the multiple-foil system and verified with the highest efficiency of energy harnessing up to nearly twice that of a single foil.

Funder

National Natural Science Foundation of China

Publisher

AIP Publishing

Subject

Condensed Matter Physics,Fluid Flow and Transfer Processes,Mechanics of Materials,Computational Mechanics,Mechanical Engineering

Link

https://aip.scitation.org/doi/pdf/10.1063/5.0127682

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