Results 1 to 10 of about 16,994 (120)
Lubricants, 2023 During the start-up process, air foil thrust bearings (AFTBs) come into contact and are prone to localized overheating and even failure. Frequent starts and stops are the major sources of wear.
Fangling Wu, Yang Hu
doaj +1 more source
Ecological Indicators, 2023 Lift-off velocity, the wind speed at which a diaspore starts moving during secondary wind dispersal, representing diaspore mobile capacity, may greatly depend on vegetation where dispersal takes place.
Liang Tian +13 more
doaj +1 more source
Drone Systems and Applications, 2022 The reciprocating-airfoil (RA) driven vertical take-off and landing (VTOL) aircraft is a new aircraft concept that utilizes the reciprocating motion of the wings to provide lift for take-off and landing.
Johnson Okoduwa Imumbhon +2 more
doaj +1 more source
Design of a Herringbone-Grooved Bearing for Application in an Electrically Driven Air Compressor
Machines, 2022 A turbo compressor was investigated to ensure the operational reliability of the charging of fuel cell systems. This study investigated air-lubricated herringbone bearings to support the high-speed rotating shaft.
Henning Schlums +2 more
doaj +1 more source
INCAS Bulletin, 2009 The AVERT project aims to asses the oscillatory blowing on the flap for a high-lift configuration (wing with flap), and involves both experimental (low speed wind tunnel INCAS) and numerical activities.At low speed the active flow control may lead to a ...
Adrian DOBRE
doaj +1 more source
Fabrication method of GaN template for high-speed chemical lift-off
AIP Advances, 2023 In this study, a gallium nitride (GaN) template fabrication method for efficient chemical lift-off (CLO) is developed. CLO is slower than other lift-off methods. An air tunnel structure is formed using a photoresist to reduce the process time and improve
Woo Seop Jeong +8 more
doaj +1 more source
A Study of Multi-Objective Aerodynamic Optimization Design for Variable Camber Airfoils and High Lift Devices [PDF]
Xibei Gongye Daxue Xuebao, 2018 Aiming at the synthetical optimization of the aerodynamic performance between the low-speed condition of two-dimensional high lift devices during take-off and landing phase and the high-speed condition of variable camber airfoil during cruise phase, an ...
doaj +1 more source
Effects of Plasma Actuator Discharge on Lift-Enhancement and Flow Patterns of Flying Wing Aircraft [PDF]
Xibei Gongye Daxue Xuebao, 2018 The nanosecond pulsed plasma discharge actuator is used on a flying wing aircraft. At the angles of attack rang from -4° to 28°, the impact of plasma actuator arrangement position and discharge frequency on lift-enhancement effect is tested.
doaj +1 more source
Applied Sciences, 2021 An accurate description of the transition corridor is of great significance for the flight process of the vertical take-off and landing (VTOL) fixed-wing unmanned aerial vehicle (UAV).
Chunyang Wang +3 more
doaj +1 more source
Aerospace, 2019 An extant bird resorts to flapping and running along its take-off run to generate lift and thrust in order to reach the minimum required wing velocity speed required for lift-off.
Phillip Burgers
doaj +1 more source