Vision‐assisted deep stall landing for a fixed‐wing UAV
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Field Robotics"
DOI: 10.1002/rob.22100
Abstract: This paper reports a guidance and control method for vision‐assisted deep stall landing for a fixed‐wing unmanned aerial vehicle (UAV). With a deep stall maneuver, a fixed‐wing UAV can land on a confined area with… read more here.
Keywords: stall; vision assisted; deep stall; assisted deep ... See more keywords
Study of Reynolds number effects on the aerodynamics of a moderately thick airfoil using a high-pressure wind tunnel
Sign Up to like & getrecommendations! Published in 2021 at "Experiments in Fluids"
DOI: 10.1007/s00348-021-03267-8
Abstract: Reynolds number effects on the aerodynamics of the moderately thick NACA 0021 airfoil were experimentally studied by means of surface-pressure measurements. The use of a high-pressure wind tunnel allowed for variation of the chord Reynolds… read more here.
Keywords: stall; reynolds number; number effects; number ... See more keywords
Experimental Investigation on the Development Process of Large-Scale Low-Speed Stall Disturbance in Contra-Rotating Compressor
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Thermal Science"
DOI: 10.1007/s11630-020-1341-z
Abstract: In order to better understand the stall process of a contra-rotating compressor, the detailed characteristic and multi-channel unsteady pressure signals have been achieved by a special layout of high-frequency response pressure sensors. The array consists… read more here.
Keywords: compressor; stall; speed; process ... See more keywords
Surrogate-based aerodynamic shape optimization for delaying airfoil dynamic stall using Kriging regression and infill criteria
Sign Up to like & getrecommendations! Published in 2021 at "Aerospace Science and Technology"
DOI: 10.1016/j.ast.2021.106555
Abstract: Abstract The dynamic stall phenomenon is characterized by the formation of a leading-edge vortex, which is responsible for adverse aerodynamic forces and moments adversely impacting the structural strength and life of a system. Aerodynamic shape… read more here.
Keywords: optimization; dynamic stall; model; stall ... See more keywords
Effects of the radial blade loading distribution and B parameter on the type of flow instability in a low-speed axial compressor
Sign Up to like & getrecommendations! Published in 2018 at "Chinese Journal of Aeronautics"
DOI: 10.1016/j.cja.2018.05.003
Abstract: Abstract Previous studies showed that an axisymmetric hub-initiated disturbance defined as partial surge may initiate the stall of a transonic compressor; to reveal the instability evolution under full-span incompressible flow for different levels of hub… read more here.
Keywords: compressor; stall; hub; parameter ... See more keywords
Aerodynamic performance improvements of a vertical axis wind turbine by leading-edge protuberance
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Wind Engineering and Industrial Aerodynamics"
DOI: 10.1016/j.jweia.2021.104535
Abstract: Abstract A detailed numerical study has been carried out to investigate the effects of leadingedge protuberance as a novel flow-separation control-technique for vertical-axis-windturbine (VAWT). The aerodynamic performance of a stationary protuberanced blade and an associated… read more here.
Keywords: aerodynamic performance; leading edge; edge; stall ... See more keywords
Numerical study on flow stall and kinetic energy conversion of low-specific-speed centrifugal pump
Sign Up to like & getrecommendations! Published in 2023 at "Physics of Fluids"
DOI: 10.1063/5.0143316
Abstract: Stall is a common phenomenon in centrifugal pumps under low-flow conditions; it has a significant impact on fatigue and can even damage mechanical structural components. Computational fluid dynamics was used to perform high-precision numerical calculations… read more here.
Keywords: stall; centrifugal pump; energy; kinetic energy ... See more keywords
Machine Learning to Predict Aerodynamic Stall
Sign Up to like & getrecommendations! Published in 2022 at "International Journal of Computational Fluid Dynamics"
DOI: 10.1080/10618562.2023.2171021
Abstract: A convolutional autoencoder is trained using a database of airfoil aerodynamic simulations and assessed in terms of overall accuracy and interpretability. The goal is to predict the stall and to investigate the ability of the… read more here.
Keywords: stall; aerodynamic stall; airfoil; machine learning ... See more keywords
Spike type of stall inception in the tandem rotor
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science"
DOI: 10.1177/09544062221104608
Abstract: There are two known mechanisms of inception of rotating stall in the compressor, modal wave inception and spike inception. However, the stall inception mechanisms for a tandem-rotor have not been explored so far in detail.… read more here.
Keywords: stall; inception; tandem rotor; spike ... See more keywords
Stall inception induced by the volute tongue at centrifugal compressor inlet
Sign Up to like & getrecommendations! Published in 2017 at "Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering"
DOI: 10.1177/0954410016645127
Abstract: The stall and surge directly impact on the safety and reliability of compressors. The spike-type and modal-type stall inception exist in compressors. At present, few studies pay attention to the stall inception of centrifugal compressor,… read more here.
Keywords: volute tongue; stall inception; stall; centrifugal compressor ... See more keywords
The effect of housing systems on hoof diseases/disorders and percentage of culling in Holstein dairy cows
Sign Up to like & getrecommendations! Published in 2022 at "Veterinarski arhiv"
DOI: 10.24099/vet.arhiv.1525
Abstract: The objectives of this research were to investigate the effect of the housing system (tie-stall and free-stall barns) on the prevalence of hoof diseases/disorders, as well as on the percentage of culling in 6,348 Holstein… read more here.
Keywords: housing; system; stall; diseases disorders ... See more keywords