Results 111 to 120 of about 296,851 (358)

Wind tunnel testing of scaled wind turbine models: Beyond aerodynamics

Journal of Wind Engineering and Industrial Aerodynamics, 2014
An aeroelastically scaled model of a wind turbine is described, featuring active individual blade pitch and torque control. The model, governed by supervision and control systems similar to those of a real wind turbine, is capable of simulating steady conditions and transient maneuvers in the boundary layer test section of the wind tunnel of the ...
BOTTASSO, CARLO LUIGI, CAMPAGNOLO, FILIPPO, V. Petrovic   +2 more
openaire   +2 more sources

Flight Flutter Testing of the P6M [PDF]

On the P6M the shake behavior, i.e., the response to random excitation at subcritical speeds of lowly damped airplane modes, is as important as the actual flutter speed.
Goldman, R. L., Kachadourian, G., Roha, D. M.   +2 more
core   +1 more source

Continuous-flow variable-density wind tunnel facilities [PDF]

, 1972
Unique features of wind tunnel facilities at Jet Propulsion Laboratory permit variety of conventional and novel tests to be performed at supersonic and hypersonic speeds.
Herrera, J. G.
core   +1 more source

Bio‐Inspired Multimodal Hardware Front‐End Enabled by 2D Floating‐Gate Memory for UAV Perception

Advanced Functional Materials, EarlyView.
A MoS2/h‐BN /graphene floating‐gate memory underpins a bio‐inspired multimodal front end that integrates visual, inertial, and airflow cues. A 4 × 4 FG memory array encodes temporal intensity differences, while IMU‐ and airflow‐driven threshold modulation suppresses self‐motion artifacts, enabling fast, low‐power, robust autonomous UAV tracking and ...
Lianghao Guo, Yue Cheng, Cong Li, Xiaoyu Guo, Jiankai Yin, Dadong Fan, Zhenyu Xu, Chenyu Tang, Arokia Nathan, Shuo Gao, Li Tao, Luigi G. Occhipinti   +11 more
wiley   +1 more source

Design and performance of a fixed, nonaccelerating, guide vane cascade that operates over an inlet flow angle range of 60 deg [PDF]

A unique set of wind tunnel guide vanes are designed with an inverse design code and analyzed with a panel method and an integral boundary layer code developed at the NASA Lewis Research Center.
Cavicchi, R. H., Gelder, T. F., Mcfarland, E. R., Sanger, N. L., Sanz, J. M.   +4 more
core   +1 more source

Highly Sensitive Oxidation‐Resistant Degradable Janus Piezoresistive Electronic Skin for Sustainable Wearable Electronics

Advanced Healthcare Materials, EarlyView.
This study presents a highly sensitive, oxidation‐resistant, biocompatible, and degradable Janus piezoresistive electronic skin for sustainable wearable electronics. The electronic skin exhibits sensitive and stable response across a broad pressure range, exceptional oxidation resistance, and Janus wettability.
Joon Kim, Mohammad Zarei, Deristisya Zahra, Yuhan Lee, Daegun Kim, Seung Goo Lee   +5 more
wiley   +1 more source

Digital twin-driven method for determining wind force coefficients of a bridge deck section

Engineering Applications of Computational Fluid Mechanics
Wind force coefficients are important parameters for aerostatic and aerodynamic analyses in wind-resistant design of a long-span bridge. Wind force coefficients of long-span bridges are currently obtained through wind tunnel tests or computational fluid ...
Hao-Yang Li, You-Lin Xu, Hai-Li Liao, Lin Huang, Qi Wang   +4 more
doaj   +1 more source

An investigation of Reynolds number effect on the aerodynamics of bluff body with sharp edges [PDF]

International Journal of Advanced Design and Manufacturing Technology, 2015
In general, the aerodynamic stability of long span bridges is evaluated based on the results of wind tunnel tests in the low Reynolds number region, because in almost all wind tunnel tests, it is impracticable to satisfy Reynolds number similitude ...
Amir Bak Khoshnevis, Amir Mamouri, Farzad Mir   +2 more
doaj  

Characterization of an Injectable Poly(vinyl alcohol)‐gelatin Hydrogel for Growth Factor Delivery in an Orthopedic Application

Advanced Healthcare Materials, EarlyView.
This work introduces photo‐crosslinkable tyraminated poly(vinyl alcohol)‐gelatin (PVA‐GT) hydrogels as tunable injectable platforms for tissue engineering and growth factor delivery applications. This schematic illustrates the two developed hydrogel formulations and the experimental workflow used to evaluate their physico‐chemical properties in vitro ...
Alessia Longoni, Gretel S. Major, Sam Arnold, Samuel Tomkins, Eugenia Spessot, Scott Loeffler, Kieran Lau, Richard Tan, Jessica Harte, Roslyn Kemp, Tess Reynolds, Jelena Rnjak‐Kovacina, Gary J. Hooper, Tim B. F. Woodfield, David C. Kieser, Khoon S. Lim   +15 more
wiley   +1 more source

Comparison of Space Shuttle Orbiter low-speed static stability and control derivatives obtained from wind-tunnel and approach and landing flight tests [PDF]

Tests were conducted in the 8 foot transonic pressure tunnel to obtain wind tunnel data for comparison with static stability and control parameters measured on the space shuttle orbiter approach and landing flight tests.
Freeman, D. C., Jr., Spencer, B., Jr.
core   +1 more source