Results 31 to 40 of about 3,625 (187)

Parametric Study on Thermo-Hydraulic Performance of NACA Airfoil Fin PCHEs Channels

Energies, 2022
In this work, a discontinuous airfoil fin printed circuit heat exchanger (PCHE) was used as a recuperator in a micro gas turbine system. The effects of the airfoil fin geometry parameters (arc height, maximum arc height position, and airfoil thickness ...
Wei Wang, Liang Ding, Fangming Han, Yong Shuai, Bingxi Li, Bengt Sunden   +5 more
doaj   +1 more source

Numerical Simulation of Flow over Bionic Airfoil

International Journal of Aerospace Engineering, 2021
In this study, the aerodynamic performance of bionic airfoil was numerically studied by CFD method. The bionic airfoil was represented by the combination of airfoil and a small trailing edge flap.
Lishu Hao, Yongwei Gao, Binbin Wei, Ke Song   +3 more
doaj   +1 more source

Aerodynamic Performance Analysis of a Modified Joukowsky Airfoil: Parametric Control of Trailing Edge Thickness

Applied Sciences, 2021
In order to ensure the blade strength of large-scale wind turbine, the blunt trailing edge airfoil structure is proposed, aiming at assessing the impact of the trailing edge shape on the flow characteristics and airfoil performance.
Pan Xiong, Lin Wu, Xinyuan Chen, Yingguang Wu, Wenjun Yang   +4 more
doaj   +1 more source

Integral Airfoil Generation of Multi-rotor Aircraft Based on Optimization of Upper Wing Contour and CFD Simulation [PDF]

Journal of Applied Fluid Mechanics
Regarding the airfoil optimization design of multi-rotor unmanned aerial vehicles, this paper proposes an integral airfoil design method based on upper airfoil contour optimization. Firstly, by designing concave descent input curves with 0-1 distribution,
Z. Wang, Y. Zhu, Q. Yuan, W. B. Gu, X. B. Xie   +4 more
doaj   +1 more source

Increase of Critical Mach Number by Local Linearization Method and Airfoil Construction at Subsonic and Transonic Regimes

MATEC Web of Conferences, 2018
A symmetrical airfoil has been constructed by local linearization method. A single-point objective function is defined to check the convergence of the method.
Bazgir Ali. S., Takovitskii Sergey. A.
doaj   +1 more source

Multi-Objective Optimization of a Small Horizontal-Axis Wind Turbine Blade for Generating the Maximum Startup Torque at Low Wind Speeds

Machines, 2022
Generating a high startup torque is a critical factor for the application of small wind turbines in regions with low wind speed. In the present study, the blades of a small wind turbine were designed and optimized to maximize the output power and startup
Vahid Akbari, Mohammad Naghashzadegan, Ramin Kouhikamali, Farhad Afsharpanah, Wahiba Yaïci   +4 more
doaj   +1 more source

Numerical simulation of icing characteristics and aerodynamic performance degradation of airfoils under different incoming flow conditions

Zhongguo Jianchuan Yanjiu, 2023
Objective This paper aims to study the effects of the freezing phenomenon of supercooled water droplets in intake air on the aerodynamic performance of a marine power intake system under cold marine environment conditions.
Lei PENG, Junhao ZHU, Meng WANG, Zhongyi WANG   +3 more
doaj   +1 more source

Effect of Tailing-Edge Thickness on Aerodynamic Noise for Wind Turbine Airfoil

Energies, 2019
The influence of wind turbine airfoil trailing edge thickness on aerodynamics and aerodynamic noise characteristics was studied using the computational fluid dynamics (CFD)/ Ffowcs Williams–Hawkings (FW–H) method in the present work.
Xinkai Li, Ke Yang, Hao Hu, Xiaodong Wang, Shun Kang   +4 more
doaj   +1 more source

Unsteady Aerodynamic Characteristics Simulations of Rotor Airfoil under Oscillating Freestream Velocity

Applied Sciences, 2020
The dynamic stall characteristics of rotor airfoil are researched by employing unsteady Reynolds-Averaged Navier-Stokes (RANS) method under oscillating freestream velocity conditions.
Qing Wang, Qijun Zhao
doaj   +1 more source

Free Surface Effects on the Hydrodynamic Characteristics of NACA0012

水下无人系统学报, 2023
When a transmedia vehicle moves across water and air media, the free surface has a great influence on its airfoil, which brings challenges to the overall design and navigation control.
Zhao LIU, Chuang HUANG, Hao YANG, Xu HE, Jianjun DANG   +4 more
doaj   +1 more source