Results 1 to 10 of about 31,802 (273)

Estimation of unsteady aerodynamics in the wake of a freely flying European starling (Sturnus vulgaris). [PDF]

open access: yesPLoS ONE, 2013
Wing flapping is one of the most widespread propulsion methods found in nature; however, the current understanding of the aerodynamics in bird wakes is incomplete.
Hadar Ben-Gida   +6 more
doaj   +2 more sources

Numerical Simulation of Heat Reduction With Use of Spike in Hypersonic Flow Based on Gas Kinetic Scheme

open access: yes气体物理, 2023
Based on the gas kinetic scheme (GKS), numerical simulation research on the thermal protection system with the spike was carried out from the independent flow field and the fluid-structure interaction. The reliability of the algorithm in independent flow
Chang-ya LIU   +3 more
doaj   +1 more source

Investigation of Aeroelasticity Effect on Missile Separation from the Internal Bay

open access: yesInternational Journal of Aerospace Engineering, 2023
There is a strong aerodynamic interference when launching the missile in the embedded mode. During the separation process, the carrier aircraft safety may be threatened due to large slenderness ratio, low structural stiffness, and aeroelasticity effects ...
Shuling Tian, Rongjie Li, Ke Xu
doaj   +1 more source

A Numerical Investigation of Supersonic Combustion Flow Control by Nanosecond-Pulsed Actuations

open access: yesEnergies, 2023
The efficiency of supersonic combustion is largely dependent on inlet and injection parameters. Additional energy input is required in some off-design conditions, and nanosecond discharge actuation can be a solution.
Yilun Yan   +3 more
doaj   +1 more source

Suppressing Uncommanded Roll-Yaw Motion by Jet Flow Control Based on Reinforcement Learning

open access: yesInternational Journal of Aerospace Engineering, 2023
The suppression of uncommanded motion of aircraft at high angles of attack (α) is a research topic of continuous concern in the aviation field. Aiming at the suppression of uncommanded roll-yaw motion of a canard aircraft at high angles of attack, an ...
Yizhang Dong   +3 more
doaj   +1 more source

Application of a Gas-Kinetic BGK Scheme in Thermal Protection System Analysis for Hypersonic Vehicles

open access: yesEntropy, 2022
One major problem in the development of hypersonic vehicles is severe aerodynamic heating; thus, the implementation of a thermal protection system is required.
Di Zhou   +4 more
doaj   +1 more source

Aerodynamic Characteristics of Radar Antenna in Stationary and Azimuthal Rotational Motion

open access: yesInternational Journal of Antennas and Propagation, 2021
To study the effects of aerodynamic loads on the aerodynamic characteristics of stationary and azimuthally rotating antennas, wind tunnel force tests are conducted using solid and porous plate antennas.
Yanqi Zhang, Zhaoming Zhang
doaj   +1 more source

Experimental Study on Dynamic Aerodynamic Characteristics of Different Antenna Aspect Ratios with Reduced Frequency

open access: yesInternational Journal of Antennas and Propagation, 2022
Radar antennas in the open air are affected by dynamic wind loading during azimuthal scanning. In this state, the acquisition and prediction of the aerodynamic load is the focus of the structure design for the antenna.
Yanqi Zhang, Zhaoming Zhang
doaj   +1 more source

An Optimized Pressure-Based Method for Thrust Vectoring Angle Estimation

open access: yesAerospace, 2023
This research developed a pressure-based thrust vectoring angle estimation method for fluidic thrust vectoring nozzles. This method can accurately estimate the real-time in-flight thrust vectoring angle using only wall pressure information on the inner ...
Nanxing Shi   +5 more
doaj   +1 more source

Comparative Study of Dynamic Stall between an Aircraft Airfoil and a Wind Turbine Airfoil in an Air–Particle Flow

open access: yesApplied Sciences, 2021
Dynamic stall in clean air flow has been well studied, but its exploration in air–particle (air–raindrop or air–sand) flow is still lacking. The aerodynamic performance loss of aircraft (NACA0012) and wind turbine (S809) airfoils and their differences ...
Junjun Jin   +4 more
doaj   +1 more source

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