Results 41 to 50 of about 151,810 (262)
Deformation Measurements of Helicopter Rotor Blades Using a Photogrammetric System
Photonics, 2022 As an important part of the helicopter, the rotor directly affects flight safety and flight quality. Knowledge of the rotor dynamic behaviors is significant for validating and optimizing the performance of the helicopter rotor system.
Chenglin Zuo +4 more
doaj +1 more source
Advances in Aerodynamics, 2019 The accuracy of gradient reconstruction methods on unstructured meshes is analyzed both mathematically and numerically. Mathematical derivations reveal that, for gradient reconstruction based on the Green-Gauss theorem (the GG methods), if the summation ...
Nianhua Wang +3 more
doaj +1 more source
The aerodynamics of the curled wake: a simplified model in view of flow control
Wind Energy Science, 2018 . When a wind turbine is yawed, the shape of the wake changes and a curled wake profile is generated. The curled wake has drawn a lot of interest because of its aerodynamic complexity and applicability to wind farm controls.
L. Martínez‐Tossas +3 more
semanticscholar +1 more source
Flight of the dragonflies and damselflies [PDF]
, 2016 This work is a synthesis of our current understanding of the mechanics, aerodynamics and visually mediated control of dragonfly and damselfly flight, with the addition of new experimental and computational data in several key areas.
Alexander DE +29 more
core +1 more source
Physical Review E, 2019 Vortex-induced vibrations (VIVs) have been observed on a long-span suspension bridge. The nonstationary wind in the field characterized by the time-varying mean wind speed is likely to lead to time-varying aerodynamics of the wind-bridge system during ...
Shanwu Li +5 more
semanticscholar +1 more source
Investigation of Aerodynamic Characteristics of a Generic Transport Aircraft in Ground Effect Using URANS Simulations [PDF]
arXiv, 2022 This paper focuses on computational prediction of aerodynamic and the flow field characteristics for NASA Common Research Model (CRM) in it's High-Lift (HL) configuration in close proximity to the ground. The URANS simulation with the Spalart-Allmaras (SA) turbulence model is checked for the quality of the generated mesh and compared with the available
arxiv
Flapping wing aerodynamics: from insects to vertebrates
Journal of Experimental Biology, 2016 More than a million insects and approximately 11,000 vertebrates utilize flapping wings to fly. However, flapping flight has only been studied in a few of these species, so many challenges remain in understanding this form of locomotion.
Diana D. Chin, D. Lentink
semanticscholar +1 more source
Study on Flow Mechanism of a Morphing Supercritical Airfoil
Shock and Vibration, 2021 In order to maintain the best performance in flight, a new concept, morphing aircraft, has been proposed, which can change the real-time aerodynamic characteristics under different flight conditions.
Yuanjing Wang +4 more
doaj +1 more source
Aerospace, 2023 A body flap/RCS-integrated configuration is often used to achieve pitch trimming and controlled flight in near space for hypersonic vehicles. Under the high temperature and pressure load induced by the expansion wave at the nozzle exit, the body flap is ...
Ruhao Hua, Qi Chen, Zhao Wan, Hao Chen
doaj +1 more source
Aerodynamic Optimization of the Angle of Attack of the Wing Design of a MQ-9 Reaper UAV [PDF]
arXiv, 2022 In this paper I present the aerodynamic optimization of the angle of attack of MQ-9 Reaper wings under turbulent airflow conditions. The background discusses the evolution of UAVs such as the Hunter and their usages for different tasks, specifically within the last decade. The main procedural stage consists of creating a criterion for choosing the most
arxiv