Wake characteristics and power performance of a drag-driven in-bank vertical axis hydrokinetic turbine

Jiyong Lee; Mirko Musa; Chris Feist; Jinjin Gao; Lian Shen; Michele Guala

doi:10.3390/en12193611

Wake characteristics and power performance of a drag-driven in-bank vertical axis hydrokinetic turbine

Jiyong Lee, Mirko Musa, Chris Feist, Jinjin Gao, Lian Shen, Michele Guala

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

5 Scopus citations

Abstract

Preliminary design of a new installation concept of a drag-driven vertical axis hydrokinetic turbine is presented. The device consists of a three-bladed, wheel-shaped, turbine partially embedded in relatively shallow channel streambanks. It is envisioned to be installed along the outer banks of meandering rivers, where the flow velocity is increased, to maximize energy extraction. To test its applicability in natural streams, flume experiments were conducted to measure velocity around the turbine and power performance using Acoustic Doppler Velocimetry and a controlled motor drive coupled with a torque transducer. The experiment results comprise the power coefficient, the spatial evolution of the mean velocity deficit, and a description of the flow structures generated by the turbine and responsible for the unsteadiness of the wake flow. Applying a triple decomposition on the Reynolds stresses, we identify the dominant contribution to such unsteadiness to be strongly associated with the blade passing frequency.

Original language	English
Article number	12193611
Journal	Energies
Volume	12
Issue number	19
DOIs	https://doi.org/10.3390/en12193611
State	Published - Sep 21 2019
Externally published	Yes

Funding

This research was funded by the Institute on the Environment (IonE) at the University of Minnesota (Grant No. DG-0003-16) Funding: This research was funded by the Institute on the Environment (IonE) at the University of Minnesota (Grant No. DG-0003-16)

Funders	Funder number
Institute on the Environment
University of Minnesota	DG-0003-16
University of Minnesota

Keywords

Hydrokinetic turbine
Open channel flow
Vertical axis turbine

UN SDGs

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

Access to Document

10.3390/en12193611

Cite this

@article{7834d101acb0434db4284e9a53535abb,

title = "Wake characteristics and power performance of a drag-driven in-bank vertical axis hydrokinetic turbine",

abstract = "Preliminary design of a new installation concept of a drag-driven vertical axis hydrokinetic turbine is presented. The device consists of a three-bladed, wheel-shaped, turbine partially embedded in relatively shallow channel streambanks. It is envisioned to be installed along the outer banks of meandering rivers, where the flow velocity is increased, to maximize energy extraction. To test its applicability in natural streams, flume experiments were conducted to measure velocity around the turbine and power performance using Acoustic Doppler Velocimetry and a controlled motor drive coupled with a torque transducer. The experiment results comprise the power coefficient, the spatial evolution of the mean velocity deficit, and a description of the flow structures generated by the turbine and responsible for the unsteadiness of the wake flow. Applying a triple decomposition on the Reynolds stresses, we identify the dominant contribution to such unsteadiness to be strongly associated with the blade passing frequency.",

keywords = "Hydrokinetic turbine, Open channel flow, Vertical axis turbine",

author = "Jiyong Lee and Mirko Musa and Chris Feist and Jinjin Gao and Lian Shen and Michele Guala",

note = "Publisher Copyright: {\textcopyright} 2019 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2019",

month = sep,

day = "21",

doi = "10.3390/en12193611",

language = "English",

volume = "12",

journal = "Energies",

issn = "1996-1073",

publisher = "MDPI",

number = "19",

}

TY - JOUR

T1 - Wake characteristics and power performance of a drag-driven in-bank vertical axis hydrokinetic turbine

AU - Lee, Jiyong

AU - Musa, Mirko

AU - Feist, Chris

AU - Gao, Jinjin

AU - Shen, Lian

AU - Guala, Michele

PY - 2019/9/21

Y1 - 2019/9/21

N2 - Preliminary design of a new installation concept of a drag-driven vertical axis hydrokinetic turbine is presented. The device consists of a three-bladed, wheel-shaped, turbine partially embedded in relatively shallow channel streambanks. It is envisioned to be installed along the outer banks of meandering rivers, where the flow velocity is increased, to maximize energy extraction. To test its applicability in natural streams, flume experiments were conducted to measure velocity around the turbine and power performance using Acoustic Doppler Velocimetry and a controlled motor drive coupled with a torque transducer. The experiment results comprise the power coefficient, the spatial evolution of the mean velocity deficit, and a description of the flow structures generated by the turbine and responsible for the unsteadiness of the wake flow. Applying a triple decomposition on the Reynolds stresses, we identify the dominant contribution to such unsteadiness to be strongly associated with the blade passing frequency.

AB - Preliminary design of a new installation concept of a drag-driven vertical axis hydrokinetic turbine is presented. The device consists of a three-bladed, wheel-shaped, turbine partially embedded in relatively shallow channel streambanks. It is envisioned to be installed along the outer banks of meandering rivers, where the flow velocity is increased, to maximize energy extraction. To test its applicability in natural streams, flume experiments were conducted to measure velocity around the turbine and power performance using Acoustic Doppler Velocimetry and a controlled motor drive coupled with a torque transducer. The experiment results comprise the power coefficient, the spatial evolution of the mean velocity deficit, and a description of the flow structures generated by the turbine and responsible for the unsteadiness of the wake flow. Applying a triple decomposition on the Reynolds stresses, we identify the dominant contribution to such unsteadiness to be strongly associated with the blade passing frequency.

KW - Hydrokinetic turbine

KW - Open channel flow

KW - Vertical axis turbine

UR - http://www.scopus.com/inward/record.url?scp=85072734644&partnerID=8YFLogxK

U2 - 10.3390/en12193611

DO - 10.3390/en12193611

M3 - Article

AN - SCOPUS:85072734644

SN - 1996-1073

VL - 12

JO - Energies

JF - Energies

IS - 19

M1 - 12193611

ER -

Wake characteristics and power performance of a drag-driven in-bank vertical axis hydrokinetic turbine

Abstract

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this