Numerical Simulation and Analysis of Coanda Effect Circulation Control for Wind-Turbine Application Considerations

Hamid, Mohd Faisal Abdul

doi:10.31436/iiumej.v12i3.68

Cited by 13 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the implementation of CC on an NREL Phase-VI wind turbine led to enhanced circulation with the increment in C µ [76], although the effect was lost at higher wind speeds due to shifting of separation point upstream of the jet. Extensive parametric studies on CC-jets showed the potential of enhancing glide ratio by careful rounding of the trailing edge, along with tailoring of Coanda-jet thickness and momentum coefficient [284,285]. A comparative study on the feasibility of applying CC on a wind turbine presented in [286] reported significant enhancements in lift and drag by separation control and super-circulation.…”

Section: Circulation Controlmentioning

confidence: 99%

Review of Flow-Control Devices for Wind-Turbine Performance Enhancement

Akhter

Omar

2021

Energies

View full text Add to dashboard Cite

It is projected that, in the following years, the wind‐energy industry will maintain its rapid growth over the last few decades. Such growth in the industry has been accompanied by the desirability and demand for larger wind turbines aimed at harnessing more power. However, the fact that massive turbine blades inherently experience increased fatigue and ultimate loads is no secret, which compromise their structural lifecycle. Accordingly, this demands higher overhaul‐and‐maintenance (O&M) costs, leading to higher cost of energy (COE). Introduction of flow‐control devices on the wind turbine is a plausible solution to this issue. Flow‐control mechanisms feature the ability to effectively enhance/suppress turbulence, advance/delay flow transition, and prevent/promote separation, leading to enhancement in aerodynamic and aeroacoustics performance, load alleviation and fluctuation suppression, and eventually wind turbine power augmentation. These flow‐control devices are operated primarily under two schemes: passive and active control. Development and optimization of flow‐control devices present the potential for reduction in the COE, which is a major challenge against traditional power sources. This review performs a comprehensive and up‐to‐date literature survey of selected flow‐control devices, from their time of development up to the present. It contains a discussion on the current prospects and challenges faced by these devices, along with a comparative analysis centered on their aerodynamic controllability. General considerations and conclusive remarks are presented after the discussion.

show abstract

Section: Circulation Controlmentioning

confidence: 99%

Review of Flow-Control Devices for Wind-Turbine Performance Enhancement

Akhter

Omar

2021

Energies

View full text Add to dashboard Cite

show abstract

“…3 was explored in Ref. [15]. The design was based upon an annular wing wrapped around a centrifugal flow generator, thus potentially creating a vehicle with no external moving parts and reducing vehicle aerodynamic losses compared to previous V/STOL technologies and substantially eliminating induced drag [15][16].…”

Section: Coandă Mav Progress and Perfectionmentioning

confidence: 99%

“…[15]. The design was based upon an annular wing wrapped around a centrifugal flow generator, thus potentially creating a vehicle with no external moving parts and reducing vehicle aerodynamic losses compared to previous V/STOL technologies and substantially eliminating induced drag [15][16]. Coandă effect offers greater potential at a micro-aerial vehicle scale with regard to fundamental performance parameter "L/D ratio" [17].…”

Section: Coandă Mav Progress and Perfectionmentioning

confidence: 99%

Application of Coandă Jet for Generating Lift of Micro Air Vehicles - Preliminary Design Considerations

Ahmed

Djojodihardjo

Talib

et al. 2014

AMM

View full text Add to dashboard Cite

Coandă effect, which has been widely utilized in many engineering applications for circulation control, is here reviewed for the design of Coandă Micro-Air-Vehicles (MAVs). Based on the review, a basic spherical configuration is analyzed to obtain the relationship between relevant parameters to the lift that can be produced based on fundamental principles. The results can be used for preliminary design purposes and are discussed in view of existing literature.

show abstract

“…To reveal the key elements that could lead to the desired lift enhancement and drag reduction, or a combination of both., without losing generalities and furthering previous studies [31][32][33], the present work critically overviews Coandă jet progress and development and looks into two-dimensional to two-dimensional airfoil in subsonic flow with Coandă jet located at its trailing edge, and devotes special attention to S809 airfoil. For benchmarking, in addition to a clean S809 airfoil, the GTRI Dual Radius CCW airfoil, which has already been investigated thoroughly, is also utilized.…”

Section: Introductionmentioning

confidence: 84%

Overview of Coanda Jet Lift Enhancement and Two-Dimensional Computational Studies

Djojodihardjo

Hamid

2012

AEJ

View full text Add to dashboard Cite

Motivated by attempts to enhance wind-turbine aerodynamic performance and efficiency, Coandă Jet Lift Enhancement for Circulation Control that has drawn great attention from researchers and industries is investigated numerically. Coandă Jet Circulation Control Techniques has a long history of development, although meticulous modeling and innovations for practical applications for energy conversion (such as for wind-turbine applications), aircraft wing lift enhancement and propulsion (such as for Coandă -MAV) are continually in progress. Along this line, the influence of Coandă effect for lift generation and enhancement is here investigated using two-dimensional CFD simulation. To that end, attention is focussed on Coandă jet configuration located at the trailing edge, to reveal the key elements that could exhibit the desired performance criteria for lift enhancement and drag reduction, or a combination of both. Parametric studies are carried out to obtain some optimum configuration, by varying pertinent airfoil geometrical and Coandă jet parameters. Particular attention is also given to turbulence modelling, by meticulous choice of appropriate turbulent models and scaling, commensurate with the grid generation, CFD code utilized and computational effectiveness. The present two-dimensional Coandă jet studies are carried out with wind turbine and micro-air-vehicle design in view, and discussed in the light of recent results from similar research.

show abstract

Numerical Simulation and Analysis of Coanda Effect Circulation Control for Wind-Turbine Application Considerations

Cited by 13 publications

References 18 publications

Review of Flow-Control Devices for Wind-Turbine Performance Enhancement

Review of Flow-Control Devices for Wind-Turbine Performance Enhancement

Application of Coandă Jet for Generating Lift of Micro Air Vehicles - Preliminary Design Considerations

Overview of Coanda Jet Lift Enhancement and Two-Dimensional Computational Studies

Contact Info

Product

Resources

About