Results 21 to 30 of about 1,291,837 (284)

Aerodynamic characteristics of a quadcopter with propellers [PDF]

AIP Conference Proceedings, 2021
The characteristics performance of the small quadcopter was measured in a wind tunnel. The effect of propellers on the lift and drag of the quadcopter frame has been found. The quadcopter descent stage was investigated numerically by the RANS approximation.
P. A. Polivanov, A. A. Sidorenko
openaire   +1 more source

In Vivo Aerodynamic Characteristics of the Nijdam Voice Prosthesis [PDF]

Acta Oto-Laryngologica, 1997
The Nijdam voice prosthesis is an indwelling valveless voice prosthesis for postlaryngectomy voice rehabilitation. The in vitro aerodynamic characteristics are reported to be comparable to that of the low-resistance Groningen voice prosthesis. Owing to the design of the prosthesis the airflow resistance depends on the shaft length of the voice ...
Hoogen, F.J.A. van den, Veenstra, A.M., Verkerke, G.J., Schutte, H.K., Manni, J.J.   +4 more
openaire   +4 more sources

Investigation of Stall Flutter Based on Peters-ONERA Aerodynamic Model [PDF]

Xibei Gongye Daxue Xuebao, 2018
The Peters model is used to simulate the linear aerodynamic force and ONERA stall model is used to simulate the nonlinear aerodynamic force. The state-space equation of the aeroelastic system is established by coupling the structural equation.

doaj   +1 more source

Numerical investigation of the aerodynamic characteristics of high-speed trains of different lengths under crosswind with or without windbreaks

Engineering Applications of Computational Fluid Mechanics, 2018
The focus of this study was the influence of the length of a train on its aerodynamic performance, with and without wind break walls, under a crosswind.
Jiqiang Niu, Dan Zhou, Xifeng Liang
doaj   +1 more source

Investigation on the Interference of Pre-bending Support Joint in Rotary Balance Test

Hangkong gongcheng jinzhan, 2020
In order to get a wide range of angles of attack, pre-bending support joints are used in rotary balance test. The pre-bending support joint is located in the model wake region at low angle of attack.
ZHANG Yongsheng, LIU Dan, HUANG Hao, LU Wei, ZHANG Qiushi, WANG Qianwei   +5 more
doaj   +1 more source

How oscillating aerodynamic forces explain the timbre of the hummingbird’s hum and other animals in flapping flight

eLife, 2021
How hummingbirds hum is not fully understood, but its biophysical origin is encoded in the acoustic nearfield. Hence, we studied six freely hovering Anna’s hummingbirds, performing acoustic nearfield holography using a 2176 microphone array in vivo ...
Ben J Hightower, Patrick WA Wijnings, Rick Scholte, Rivers Ingersoll, Diana D Chin, Jade Nguyen, Daniel Shorr, David Lentink   +7 more
doaj   +1 more source

Modeling of unsteady aerodynamic loads

, 2011
Time-accurate solutions of the Euler or Navier-Stokes equations are still nowadays a computationally expensive approach for applications where a magnitude of parameters has to be investigated. This work focuses on flight dynamics-related studies.
Cummings, R. M., McCracken, A., Da Ronch, A., Badcock, K. J., Ghoreyshi, M.   +4 more
core   +1 more source

Numerical Analysis of the Interference Effect of Oblique Forward Jet on the Rear Body of Aircraft in Extreme Environments

气体物理
The oblique forward jet from the rear body serves as an effective mechanism for achieving rapid separation between the front and rear stages of an aircraft.
Yang WANG, Xinyu SONG, Shengyi WANG
doaj   +1 more source

Longitudinal aerodynamic characteristic of UAV

, 2018
Longitudinal aerodynamic characteristic of ...
Junli Wang (5332019)
core   +1 more source

Towards a Balanced Design of a Grid Fin with Lightweight Aerodynamics and Structural Integrity

Aerospace
It is widely accepted that the lightweight design of a grid fin is closely related to its aerodynamic performance and structural integrity, while limited work seeks their balance.
Yuxin Liu, Mingliang Zhu, Fuzhen Xuan
doaj   +1 more source