Numerical investigation of the quasi-vortex-ring state of the propulsive wing in vertical descent

Lu, Jiaxin; Lu, Yang; Wang, Junjie; Xu, Xice; Shao, Mengxue

doi:10.1016/j.ast.2022.108075

Cited by 6 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unsteady Reynolds-Averaged Navier-Stokes method (URANS) is employed in the CFDs model to simulate the incompressible flow field around the propulsive wing [19,20], employing identical conditions to those of the experimental setup. The governing equations are as follows: The lift coefficient, drag coefficient, and torque coefficient of the propulsive wing are defined as…”

Section: Solution Methodsmentioning

confidence: 99%

Numerical Simulation and Experimental Study on the Aerodynamics of Propulsive Wing for a Novel Electric Vertical Take-Off and Landing Aircraft

Wang,

Zhang,

et al. 2024

Aerospace

Self Cite

View full text Add to dashboard Cite

The electric vertical take-off and landing (eVTOL) aircraft offers the advantages of vertical take-off and landing, environmental cleanliness, and automated control, making it a crucial component of future urban air traffic. As competition intensifies, demands for aircraft performance are escalating, including forward flight speed and payload capacity. The article presents a novel eVTOL design with propulsive wings and establishes methodologies for propulsive wing unsteady numerical simulation and wind tunnel experiments, analyzing its aerodynamic characteristics and lift enhancement mechanism. The results indicate that the cross-flow fan (CFF) provides unique airflow control capabilities, enabling the propulsive wing to achieve remarkably high lift coefficients (exceeding 7.6 in experiments) and propulsion coefficients (exceeding 7.1 in experiments) at extreme angles of attack (30°~40°) and low airspeeds. On the one hand, the CFF effectively controls boundary layer flow, delaying airflow separation at high angles of attack; on the other hand, the rotation of the CFF induces two eccentric vortices, generating vortex-induced lift and propulsion. The aerodynamic performance of the propulsive wing depends on the advance ratio and angle of attack. Typically, both lift and propulsion coefficients increase with the advance ratio, while lift and drag coefficients increase with the angle of attack. The propulsive wing shows significant advantages and prospects for eVTOL aircrafts in the low flight velocity range (0–30 m/s).

show abstract

Section: Solution Methodsmentioning

confidence: 99%

Numerical Simulation and Experimental Study on the Aerodynamics of Propulsive Wing for a Novel Electric Vertical Take-Off and Landing Aircraft

Wang,

Zhang,

et al. 2024

Aerospace

Self Cite

View full text Add to dashboard Cite

show abstract

“…Energy methods, which were widely used in the early development of short-takeoffand-landing transport aircraft [1][2][3], are used to achieve break-free streamlining of largeheight airfoils. More recently, these methods have been implemented to resolve challenges related to the seamless integration of propulsion systems with aircraft airframes as well as the utilization of engines to promote flow laminarization and boundary layer usage near aerodynamic surfaces [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…The modification of existing airfoils and the design of new ones to enhance their aerodynamic properties have been extensively analyzed in numerous studies [1][2][3]. Several types of airfoils that incorporate internal channels and energy principles for lift augmentation and thrust generation by extracting air from a critical point on the wing's trailing edge have been developed.…”

Section: Introductionmentioning

confidence: 99%

Control of Aerodynamic Characteristics of Thick Airfoils at Low Reynolds Numbers Using Methods of Boundary Layer Control

Bulat,

Chernyshov,

Prodan

et al. 2024

Fluids

View full text Add to dashboard Cite

The article explores flow behavior around thick airfoils at low Reynolds numbers and the potential application of energy methods to manipulate the flow field for increased lift and reduced drag. The study relies on a set of propulsion airfoils calculated using a combined approach of solving the inverse problem of aerodynamics and applying stochastic global optimization methods. The calculations consider the transition from laminar to turbulent flow regimes, which significantly affects lift and airfoil drag. The suitability of different turbulence models for airfoil modeling in low Reynolds numbers is discussed, and numerical simulation results determine the lift coefficient dependence on angle of attack and the optimal air flow rate taken from the airfoil surface for each angle of attack. The accuracy of different turbulence models is analyzed by comparing numerical simulation results to physical experiment data.

show abstract

Numerical study on hydrodynamic performance of an underwater propulsive wing propulsor

Zhang

et al. 2023

Ocean Engineering

View full text Add to dashboard Cite

Numerical investigation of the quasi-vortex-ring state of the propulsive wing in vertical descent

Cited by 6 publications

References 17 publications

Numerical Simulation and Experimental Study on the Aerodynamics of Propulsive Wing for a Novel Electric Vertical Take-Off and Landing Aircraft

Numerical Simulation and Experimental Study on the Aerodynamics of Propulsive Wing for a Novel Electric Vertical Take-Off and Landing Aircraft

Control of Aerodynamic Characteristics of Thick Airfoils at Low Reynolds Numbers Using Methods of Boundary Layer Control

Numerical study on hydrodynamic performance of an underwater propulsive wing propulsor

Contact Info

Product

Resources

About