Wake-Model Effects on Induced Drag Prediction of Staggered Boxwings

Schirra, J.; Bissonnette, William; Bramesfeld, Goetz

doi:10.3390/aerospace5010014

Cited by 4 publications

(2 citation statements)

References 33 publications

(59 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Stagger affects the angle of incidence for each wing, and its impact is based on the level of flow interaction, which is subject to vertical separation. This vertical separation is mainly responsible for the efficiency factor having an effect on lift-induced drag [34]. Additionally, it modifies the wing area exposed to flow at non-zero angles of attack, leading to alterations in the total form drag.…”

Section: Resultsmentioning

confidence: 99%

Low- and High-Fidelity Aerodynamic Simulations of Box Wing Kites for Airborne Wind Energy Applications

2023

View full text Add to dashboard Cite

High aerodynamic efficiency is a key design driver for airborne wind energy systems as it strongly affects the achievable energy output. Conventional fixed-wing systems generally use aerofoils with a high thickness-to-chord ratio to achieve high efficiency and wing loading. The box wing concept suits thinner aerofoils as the load distribution can be changed with a lower wing span and structural reinforcements between the upper and lower wings. This paper presents an open-source toolchain for reliable aerodynamic simulations of parameterized box wing configurations, automating the design, meshing, and simulation setup processes. The aerodynamic tools include the steady 3D panel method solver APAME and the CFD-solver OpenFOAM, which use a steady Reynolds-Averaged Navier–Stokes approach with k-ω SST turbulence model. The finite-volume mesh for the CFD-solver is generated automatically with Pointwise using eight physical design parameters, five aerofoil profiles and mesh refinement specifications. The panel method provided accurate and fast results in the linear lift region. For higher angles of attack, CFD simulations with high- to medium-quality meshes were required to obtain good agreement with measured lift and drag coefficients. The CFD simulations showed that the upper wing stall lagged behind the lower wing, increasing the stall angle of attack compared to conventional fixed-wing kites. In addition, the wing tip boundary layer separation was delayed compared to the wing root for the straight rectangular box wing. Choosing the design point and operational envelope wisely can enhance the aerodynamic performance of airborne wind energy kites, which are generally operated at a large angle of attack to maximise the wing loading and tether force, and through that, the power output of the system.

show abstract

Section: Resultsmentioning

confidence: 99%

Low- and High-Fidelity Aerodynamic Simulations of Box Wing Kites for Airborne Wind Energy Applications

2023

View full text Add to dashboard Cite

show abstract

“…The production of lift contributes to the creation of induced drag. Induced drag is the drag that is produced as a side product of lift [1]. In real life situation, induced drag causes the net lift to be reduced significantly, causing wastage and inefficiency.…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study of Concave Wing Design for Subsonic Aircraft (NACA 2412)

Cheema¹,

Asmuin²

2022

PAAT

View full text Add to dashboard Cite

In this current world of technology, airfoil has been produced for concave wing in many different shapes in terms of root size, tip, existence of winglet and different thickness.Concave wing isthe tendency of a wing to bend during flying at a certain height of deflection. Itincreased higher velocity of the aircraft,mainly due to the increase of lift force produced above the wing.However bySolidWorks,airfoil design for concave wing with NACA 2412 has been choosen.In this study, 0.2m deflection shows the highest lift coefficient andlift drag ratio compared to other height of deflection.The maximum value of CLobtained is 1.517, while for CL/CDis 37.708. This indicates that the airfoil can produce high lift even at low angle of attack, which is beneficial when aircraft wants to take-off, climbing and landing.

show abstract

Aerodynamic Interference Significance Analysis of Two-Dimensional Front Wing and Rear Wing Airfoils with Stagger and Gap Variations

et al. 2019

View full text Add to dashboard Cite

 Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

show abstract

Wake-Model Effects on Induced Drag Prediction of Staggered Boxwings

Cited by 4 publications

References 33 publications

Low- and High-Fidelity Aerodynamic Simulations of Box Wing Kites for Airborne Wind Energy Applications

Low- and High-Fidelity Aerodynamic Simulations of Box Wing Kites for Airborne Wind Energy Applications

Feasibility Study of Concave Wing Design for Subsonic Aircraft (NACA 2412)

Aerodynamic Interference Significance Analysis of Two-Dimensional Front Wing and Rear Wing Airfoils with Stagger and Gap Variations

Contact Info

Product

Resources

About