Results 41 to 50 of about 1,566,376 (417)
Data-driven repetitive control: Wind tunnel experiments under turbulent conditions [PDF]
Frederik, J., Kr\"oger, L., G\"ulker, G., & van Wingerden, J. W.
(2018). Data-driven repetitive control: Wind tunnel experiments under
turbulent conditions. Control Engineering Practice, 80, 105-115, 2018 A commonly applied method to reduce the cost of wind energy, is alleviating the periodic loads on turbine blades using Individual Pitch Control (IPC). In this paper, a data-driven IPC methodology called Subspace Predictive Repetitive Control (SPRC) is employed. The effectiveness of SPRC will be demonstrated on a scaled 2-bladed wind turbine.
arxiv +1 more source
Contemporary frame of measurement and assessment of wind-tunnel flow quality in a low-speed facility
, 2018 The requirements for the accuracy of measurements in a wind tunnel test become more and more severe while the complexity of the test increases. In an environment of reduced time available for wind tunnel test and increasing test costs, it is important ...
Goran Ocokoljić +3 more
semanticscholar +1 more source
Influence of heat transfer on MHD flow in a pipe with expanding or contracting permeable wall
Ain Shams Engineering Journal, 2014 The present study investigates the effects of heat transfer on MHD laminar viscous flow in a pipe with expanding or contracting permeable wall. The pipe wall expands or contracts uniformly at a time dependent rate.
S. Srinivas +3 more
doaj +1 more source
Low Speed Wind Tunnel Design and Optimization Using Computational Techniques and Experimental Validation [PDF]
INCAS Bulletin, 2019 Generally, the experimental aerodynamics is related to wind tunnel experiments. The wind tunnel design topic is very old but the development in computational fluid dynamics led to improvement in the wind tunnel design. This paper describes the design and
Ahmed ABOELEZZ
doaj +1 more source
Framing Failures in Wood-Frame Hip Roofs under Extreme Wind Loads
Frontiers in Built Environment, 2018 Wood-frame residential roof failures are among the most common and expensive types of wind damage. Hip roofs are commonly understood to be more resilient during extreme wind in relation to gable roofs.
Sarah A. Stevenson +2 more
doaj +1 more source
Design and testing of an affordable desktop wind tunnel [PDF]
arXiv, 2023 Wind tunnels are a key source of data collection, but their cost and size can be a significant obstacle to their acquisition and usage, especially for applications such as instrument calibration, instruction, or in-class demonstrations. Here we propose a design for a cost-effective, desktop wind tunnel. This design takes advantage of readily available,
arxiv
Modelling of atmospheric boundary layer: Generation of shear. [PDF]
, 2010 Roughness length, z0 and friction velocity, u* are the defining parameters of wind log profile that must be matched in wind tunnel simulation. To fully understand the role of these parameters, the basics and review from the primitive equations and its ...
Beeck, J. V. +5 more
core +1 more source
Wind Tunnel and Hover Performance Test Results for Multicopter UAS Vehicles
Proceedings of the Vertical Flight Society 72nd Annual Forum, 2016 There is currently a lack of published data for the performance of multicopter unmanned aircraft system (UAS) vehicles, such as quadcopters and octocopters, often referred to collectively as drones. With the rapidly increasing popularity of multicopter
Carl Russell +3 more
semanticscholar +1 more source
FEBS Open Bio, EarlyView.The C. elegans tetraspanin‐7 (tsp‐7) is a homologue of human CD63, which is a negative regulator of autophagy. The C. elegans strain, tm5761, has a dysfunctional (knockout) tsp‐7 gene. When compared to the wild‐type strain, the tm5761 strain shows increased: life‐ and health‐span; thermotolerance, and stress‐induced locomotion.
Brogan Jones +2 more
wiley +1 more source
The control system design and study for continuous supersonic wind tunnel
Xibei Gongye Daxue Xuebao, 2022 As the first continuous supersonic wind tunnel in China, Mach number and total pressure are the most important flow field parameters of the wind tunnel, how to precise control and rapid and stable adjustment of total pressure and Mach number is the key ...
CHEN Dan +4 more
doaj +1 more source