Results 61 to 70 of about 8,580 (166)

Effects of surface heat transfer on the dynamic stall performance of a pitching airfoil in turbulent flow

International Journal of Thermofluids
The dynamic stall phenomenon has been extensively studied in literature. Despite various innovative interventions focused on understanding its behavior, there are few efforts to study the influence of heat transfer on the dynamic stall performance of ...
Abbas Dorri, Masoud Darbandi
doaj   +1 more source

Unsteady Aerodynamics of Delta Kites for Airborne Wind Energy Under Dynamic Stall Conditions

Wind Energy
Three unsteady aerodynamic tools at different levels of fidelity and computational cost were used to investigate the unsteady aerodynamic behavior of a delta kite applied to airborne wind energy.
I. Castro‐Fernández, R. Cavallaro, R. Schmehl, G. Sánchez‐Arriaga   +3 more
doaj   +1 more source

Dynamic Stall Control on the Wind Turbine Airfoil via a Co-Flow Jet

Energies, 2016
Dynamic stall control of a S809 airfoil is numerically investigated by implementing a co-flow jet (CFJ). The numerical methods of the solver are validated by comparing results with the baseline experiment as well as a NACA 6415-based CFJ experiment ...
He-Yong Xu, Chen-Liang Qiao, Zheng-Yin Ye   +2 more
doaj   +1 more source

Numerical Investigation on the Evolution Process of Different Vortex Structures and Distributed Blowing Control for Dynamic Stall Suppression of Rotor Airfoils

Actuators
The influencing characteristic for the evolution mechanism of a dynamic stall vortex structure and distributed blowing control on rotor airfoils was investigated. Based on the moving-embedded grid method, the finite volume scheme, and Roe’s FDS scheme, a
Guoqiang Li, Shihe Yi, Binbin Li, Xin Zhang   +3 more
doaj   +1 more source

Experimental and Computational Analysis of the Unstable Flow Structure in a Centrifugal Compressor with a Vaneless Diffuser

Chinese Journal of Mechanical Engineering, 2019
The unstable flow phenomena in compressors, such as stall and surge, are closely related to the efficiency and the operating region. It is indispensable to capture the unstable flow structure in compressors and understand the mechanism of flow ...
Xiang Xue, Tong Wang
doaj   +1 more source

Sensitivity of Dynamic Stall Models to Dynamic Excitation on Large Flexible Wind Turbine Blades in Edgewise Vibrations

Energies
Present studies are specifically aimed at investigating the sensitivity of different dynamic stall models when exposed to various excitation frequencies. The investigations are targeted at blade edgewise vibrations.
Galih Bangga
doaj   +1 more source

Aerodynamic Performance of Wind Turbine Airfoil DU 91-W2-250 under Dynamic Stall

Applied Sciences, 2018
Airfoils are subjected to the ‘dynamic stall’ phenomenon in significant pitch oscillations during the actual operation process of wind turbines.
Shuang Li, Lei Zhang, Ke Yang, Jin Xu, Xue Li   +4 more
doaj   +1 more source

HAWT performance with dynamic stall [PDF]

, 1986
In this report we calculated the effects of flow nonuniformities (wing shear, tower wake, yaw, and large-scale turbulence) on the performance of a horizontal axis wind turbine, accounting for dynamic stall. We modified the PROP program to incorporate and compare these effects with the uniform flow case.
openaire   +2 more sources

Numerical Simulation of Aerodynamic Instability Mechanisms in the Diffuser of a Multistage Centrifugal Compressor

Fluids
The main reason for limiting the working flow range of the compressor is the unstable flow phenomenon of the compressor working at a small flow rate, including stall, surge, and rotational instability.
Zhuhai Zhong, Xiaodan Zhang, Kunlun Bai, Meng Wang, Xiaodong Lu   +4 more
doaj   +1 more source

Dynamic stall modeling of a wind turbine airfoil at various stall-induced vibration zones

Frontiers in Energy Research
The present work entails investigation of the unsteady aerodynamic characteristics of a wind turbine airfoil operating in four stall-induced vibration (SIV) regimes, including normal (SIV-1) and reverse (SIV-2) flow conditions. We conducted computational
Galih Bangga, Taurista P. Syawitri, Chairunnisa   +2 more
doaj   +1 more source