Article
Mechanics
Waseeq Siddiqui, Aamir Sultan, Adnan Maqsood, Shuaib Salamat, Hongyi Xu, Dan Xie
Summary: This research investigates the wing rock features of a rectangular wing using experimental, numerical, and analytical approaches. The findings show that the movement of the separation bubble and its interaction with the wingtip vortices are crucial in inducing the wing rock phenomenon in rectangular wings. The experimental and numerical results are in good agreement.
Review
Engineering, Aerospace
Sonya Tiomkin, Daniella E. Raveh
Summary: Recent advances in micro-technology have made micro air vehicles (MAVs) feasible, with a focus on maneuverability and adaptability to unsteady flow conditions. The limitations of rigid wings in low Reynolds number flow have led to a growing interest in membrane wings, inspired by bat wings, which passively adapt to flow conditions. Membrane wings offer higher aerodynamic efficiency and agility for MAVs compared to rigid wings.
PROGRESS IN AEROSPACE SCIENCES
(2021)
Article
Engineering, Aerospace
Khanh Nguyen, Loan Thi Kim Au, Hoang-Vu Phan, Soo Hyung Park, Hoon Cheol Park
Summary: This study investigates the effects of wing kinematics, corrugation structures, and clap-and-fling on the aerodynamic efficiency of a flapping-wing micro air vehicle. It is found that modified wing kinematics version 3 improved the lift-to-drag ratio by 24%, and distributed wing corrugations slightly augmented the L/D by 2%. Clap-and-fling behavior, however, contributed to a 5% increase in lift but a 9% increase in drag, leading to a 4% reduction in L/D.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Shengjie Xiao, Yuhong Sun, Dapeng Ren, Kai Hu, Huichao Deng, Yun Wang, Xilun Ding
Summary: This paper presents a bio-inspired flapping-wing micro air vehicle with a cross-tail wing for attitude adjustment. The novel flapping mechanism and optimized wings generate high aerodynamic force and torque, resulting in improved maneuverability. The flight tests demonstrate the excellent handling and payload capability of the vehicle, as well as the effectiveness of the attitude control method.
Article
Engineering, Aerospace
Khanh Nguyen, Loan Thi Kim Au, Hoang-Vu Phan, Hoon Cheol Park
Summary: This paper compares the characteristics of hovering stability for two insect-inspired flapping-wing micro air vehicles (FW-MAVs) with different control mechanisms, and finds that the Stroke-Plane-Change (SPC) mechanism stabilizes faster and responds quicker than the Trailing-Edge-Change (TEC) mechanism, offering more agility for operation in cluttered environments.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Loan Thi Kim Au, Hoon Cheol Park, Seok Tae Lee, Sung Kyung Hong
Summary: The aerodynamic performance of the clap-and-fling mechanism in the KU-Beetle micro air vehicle was investigated, showing that it enhances lift and reduces lift-to-power ratio. The contributions of the fling phases are more significant than the clap phases.
Article
Engineering, Aerospace
Prithwish Mukherjee, Amit A. Pawar, Kumar Sanat Ranjan, Sandeep Saha
Summary: This study investigates the effects of corrugations on lift and aerodynamic efficiency of delta wings for fixed-wing micro aerial vehicles at low Reynolds number. Numerical simulations show that corrugations can potentially improve aerodynamic characteristics with significant increments in efficiency and lift compared to conventional delta wings.
JOURNAL OF AIRCRAFT
(2021)
Article
Mechanics
You Wu, Yating Hu, Yuting Dai, Guangjing Huang, Chao Yang
Summary: This paper investigates the influence of spanwise-distributed trailing edge camber morphing on the dynamic stall characteristics of a finite-span wing. It is found that the trailing edge deformation can change the aerodynamic and energy transfer characteristics of the dynamic stall, and has the potential to suppress stall flutter.
Article
Engineering, Aerospace
Jianghao Wu, He Yan, Chao Zhou, Yanlai Zhang
Summary: The study found that in forward flight, a flapping rotary wing demonstrates reduced thrust and lift as well as enhanced rotational moment, mainly due to changes in aerodynamics on the retreating side. Factors such as a larger advance ratio and severe forward tilt of the rotational plane are disadvantageous for thrust production, but beneficial for enhancing the rotational moment.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Erfan Salami, Elham Montazer, Thomas A. Ward, Nik Nazri Nik Ghazali, Irfan Anjum Badruddin
Summary: A novel tandem flapping wing mechanism is proposed in this study for the design of biomimetic micro air vehicles. Through optimization and spatial network analysis, the designed structure exhibits good aerodynamic performance and consistency.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Mechanics
Lei Dong, Kwing-So Choi, Yaxing Wang
Summary: In this study, the flow control of the tip vortices over a very low aspect-ratio wing was performed using dielectric-barrier-discharge plasma actuators. The results showed that plasma flow control led to significant changes in the aerodynamic forces, with the lift coefficient increasing by 23% and decreasing by 30% with the blowing and suction plasma actuators, respectively. The drag coefficient only experienced a minor change of less than 10%. The blowing plasma actuator moved the tip vortices away from the wing tip, increasing the streamwise vorticity, turbulence intensities, and Reynolds stress. On the other hand, the suction plasma actuator shifted the tip vortices closer to the wing tip. The blowing plasma increased the tip vortex circulation, while the counter-flowing suction plasma reduced it.
Article
Engineering, Multidisciplinary
Xin Fang, Jianghao Wu, Feng Du
Summary: This study establishes an elastodynamic model for flapping-wing MAV, investigates the effect of elastic deformation of the transmission mechanism on flapping motion, and derives an analytical formula for the relationship between transmission mechanism deformation and flapping angle based on kineto-elastostatic analysis.
BIOINSPIRATION & BIOMIMETICS
(2021)
Article
Mechanics
Javier Crespo Moreno, Rafael Bardera Mora, Angel Antonio Rodriguez Sevillano, Alvaro Cobo Gonz
Summary: The purpose of this paper is to demonstrate the advantages of using a smart composite in a micro air vehicle equipped with morphing wing technology. By attaching a Macro Fiber Composite (MFC) actuator to the wing's bottom surface, the wing's camber can be modified during the mission, optimizing the MAV for each flight and enhancing versatility and market appeal. The application of MFC actuators allows for increased camber and maximum lift coefficient, enabling the MAV to fly at slower speeds to accommodate different payloads, while reducing camber enhances aerodynamic efficiency, improving range and endurance. The feasibility of implementing MFC actuators for control and maneuverability of these vehicles has been demonstrated through prototype-level tests at INTA. The use of this material in aerospace industry opens up various research fields in aerospace engineering, including new features in flight mechanics and aerodynamic performance, as well as novel strategies in the design of flight stability and control laws.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Aerospace
Mingtai Chen, James P. Hubner
Summary: This study discusses experimental data and models for single-rotor-wing interactions at low disk loadings and low Reynolds numbers for tiltrotor-like vehicles. The results show that the analytical model based on actuator disk theory and other methods compares well with experimental data in terms of hover performance and download force, providing useful information for preliminary design studies.
JOURNAL OF AEROSPACE ENGINEERING
(2021)
Article
Physics, Fluids & Plasmas
Sheng-Kai Chang, You-Jun Lin, Kuan-Lun Hsu, Jing-Tang Yang
Summary: This study investigated the effect of wing shape on a forward-flying butterfly by decoupling the wing-swept angle and the aspect ratio. It was found that the wing-swept angle and the aspect ratio simultaneously change during wing sweeping and have different effects on aerodynamics. By establishing wing shape models with varied combinations of these factors and conducting numerical simulations, the study revealed distinct flow mechanisms and aerodynamic trends, providing insight into butterfly flight and microaerial vehicle design.
Article
Engineering, Aerospace
Andre F. P. Ribeiro, Carlos Ferreira, Damiano Casalino
Summary: This study compares a filament-based free wake panel method to experimental and validated numerical data in order to simulate propeller slipstreams and their interaction with aircraft components. The results show that the free wake panel method is able to successfully capture the slipstream deformation and shearing, making it a useful tool for propeller-wing interaction in preliminary aircraft design.
AEROSPACE SCIENCE AND TECHNOLOGY
(2024)
