Results 191 to 200 of about 1,566,376 (417)

DOB-based Wind Estimation of A UAV Using Its Onboard Sensor [PDF]

arXiv
Unmanned Aerial Vehicles (UAVs) play a crucial role in meteorological research, particularly in environmental wind field measurements. However, several challenges exist in current wind measurement methods using UAVs that need to be addressed. Firstly, the accuracy of measurement is low, and the measurement range is limited.
arxiv  

Wind tunnel technology for the development of future commercial aircraft [PDF]

Requirements for new technologies in the area of civil aircraft design are mainly related to the high cost involved in the purchase of modern, fuel saving aircraft. A second important factor is the long term rise in the price of fuel.
Szodruch, J.
core   +1 more source

Acoustic Moiré Flat Bands in Twisted Heterobilayer Metasurface

Advanced Materials, EarlyView.
This research proposes a heterobilayer moiré acoustic metasurface using two distinct lattice structures. The heterobilayer design contributes to divergent dispersion curves for the upper and lower layers and allows for greater flexibility in tuning their hybridization through interlayer twisting.
Shida Fan, Chenglin Han, Kuan He, Liang Bai, Li‐Qun Chen, Huaitao Shi, Chen Shen, Tianzhi Yang   +7 more
wiley   +1 more source

CFD and experimental data of closed-loop wind tunnel flow

Data in Brief, 2016
The data presented in this article were the basis for the study reported in the research articles entitled ‘A validated design methodology for a closed loop subsonic wind tunnel’ (Calautit et al., 2014) [1], which presented a systematic investigation ...
John Kaiser Calautit, Ben Richard Hughes
doaj  

Comparison of Lifetime-Based Pressure-Sensitive Paint Measurements in a Wind Tunnel Using Model Pitch–Traverse and Pitch–Pause Modes

Photonics
In order to improve the data productivity of a wind tunnel test, the model under investigation in the wind tunnel is moved continuously with a predetermined constant angular speed in the so-called pitch–traverse mode. Alternatively, the wind tunnel model
Christian Klein, Daisuke Yorita, Ulrich Henne   +2 more
doaj   +1 more source

Long-duration wind tunnel flights reveal exponential declines in protein catabolism over time in short- and long-distance migratory warblers. [PDF]

Proc Natl Acad Sci U S A, 2023
Elowe CR, Groom DJE, Slezacek J, Gerson AR.   +3 more
europepmc   +1 more source

Interference due to walls of a wind-tunnel

, 1933
L. Rosenhead
openalex   +1 more source

A common geometric data-base approach for computer-aided manufacturing of wind-tunnel models and theoretical aerodynamic analysis [PDF]

A more automated process to produce wind tunnel models using existing facilities is discussed. A process was sought to more rapidly determine the aerodynamic characteristics of advanced aircraft configurations.
Cozzolongo, J. V., See, M. J.
core   +1 more source

Anomalous Phonon Softening with Inherent Strain in Wrinkled Monolayer WSe2

Advanced Materials, EarlyView.
This study introduces the first discovery of a new local strain indicator, A2′′(Γ)$A_2^{^{\prime\prime}}( \Gamma )$ mode, for monolayer WSe2‐based excitonic applications including single photon emitter by using tip‐enhanced Raman spectroscopy. The correlative investigation with density functional perturbation theory provides the origin of the anomalous
Dong Hyeon Kim, Jaekak Yoo, Hyeong Chan Suh, Yo Seob Won, Sung Hyuk Kim, Dong‐Joon Yi, Byeong Geun Jeong, Chanwoo Lee, Dongki Lee, Ki Kang Kim, Seung Mi Lee, Eui Kwan Koh, Mun Seok Jeong   +12 more
wiley   +1 more source

Wind-tunnel testing of sports stadia to optimise their use and safety

Journal of the South African Institution of Civil Engineers, 2010
Several wind-tunnel studies of sports stadia were recently carried out at the CSIR's Boundary-Layer Wind-Tunnel Laboratory in Pretoria. This paper gives a brief background to wind-tunnel modelling, highlights the relevant aspects of representing large ...
AM Goliger
doaj