Diffuser total efficiency using generalized actuator disc model and its maximization method

Shigeo Yoshida; Masataka Motoyama; Peter Jamieson; Koij Matsuoka

doi:10.3390/en14040813

Diffuser total efficiency using generalized actuator disc model and its maximization method

Shigeo Yoshida, Masataka Motoyama, Peter Jamieson, Koij Matsuoka

Research output: Contribution to journal › Article › peer-review

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Abstract

The diffuser total efficiency was formulated and defined based on the generalized actuator disc model for the index of the efficiency of the diffuser-alone of the diffuser-augmented wind turbines. An optimization method to maximize the diffuser total efficiency was developed using a genetic algorithm and axisymmetric computational fluid dynamics. A case study was conducted for a 10% chord-to-diameter ratio, 2% thickness-to-chord plate, and the crest position at 50% chord of the diffuser. The optimal result showed a diffuser total efficiency of 1.087. Furthermore, 1392 (=48 population × 29 generations) simulation cases of the optimization process showed that high diffuser total efficiency appears at a low-drag coefficient, high-lift coefficient, and 15–25% low diffuser height-to-chord ratio.

Original language	English
Article number	813
Journal	Energies
Volume	14
Issue number	4
DOIs	https://doi.org/10.3390/en14040813
Publication status	Published - Feb 2 2021

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology
Energy (miscellaneous)
Control and Optimization
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.3390/en14040813

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title = "Diffuser total efficiency using generalized actuator disc model and its maximization method",

abstract = "The diffuser total efficiency was formulated and defined based on the generalized actuator disc model for the index of the efficiency of the diffuser-alone of the diffuser-augmented wind turbines. An optimization method to maximize the diffuser total efficiency was developed using a genetic algorithm and axisymmetric computational fluid dynamics. A case study was conducted for a 10% chord-to-diameter ratio, 2% thickness-to-chord plate, and the crest position at 50% chord of the diffuser. The optimal result showed a diffuser total efficiency of 1.087. Furthermore, 1392 (=48 population × 29 generations) simulation cases of the optimization process showed that high diffuser total efficiency appears at a low-drag coefficient, high-lift coefficient, and 15–25% low diffuser height-to-chord ratio.",

author = "Shigeo Yoshida and Masataka Motoyama and Peter Jamieson and Koij Matsuoka",

note = "Funding Information: Funding: Part of this research is the result obtained from JSPS Grants-in-Aid for Scientific Research (19K04195). Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

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doi = "10.3390/en14040813",

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AU - Yoshida, Shigeo

AU - Motoyama, Masataka

AU - Jamieson, Peter

AU - Matsuoka, Koij

N1 - Funding Information: Funding: Part of this research is the result obtained from JSPS Grants-in-Aid for Scientific Research (19K04195). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/2/2

Y1 - 2021/2/2

N2 - The diffuser total efficiency was formulated and defined based on the generalized actuator disc model for the index of the efficiency of the diffuser-alone of the diffuser-augmented wind turbines. An optimization method to maximize the diffuser total efficiency was developed using a genetic algorithm and axisymmetric computational fluid dynamics. A case study was conducted for a 10% chord-to-diameter ratio, 2% thickness-to-chord plate, and the crest position at 50% chord of the diffuser. The optimal result showed a diffuser total efficiency of 1.087. Furthermore, 1392 (=48 population × 29 generations) simulation cases of the optimization process showed that high diffuser total efficiency appears at a low-drag coefficient, high-lift coefficient, and 15–25% low diffuser height-to-chord ratio.

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Diffuser total efficiency using generalized actuator disc model and its maximization method

Abstract

All Science Journal Classification (ASJC) codes

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