Results 291 to 300 of about 15,596,670 (337)

Study on the aerodynamic characteristics and ventilation effects of ultra-high-speed elevator car-counterweight system under the influence of multiple parameters

The Physics of Fluids
When the ultra-high-speed elevator car-counterweight system runs opposite each other, significant piston effects are caused, seriously affecting the elevator operation's stability.
Xiang-Rui Zeng, Qin He, Rui-Jun Zhang, Dong-Sheng Cong, Dian-you Wang   +4 more
semanticscholar   +1 more source

Aerodynamic Characteristics of the Wings and Body of a Dragonfly

Journal of Experimental Biology, 1996
ABSTRACT The aerodynamic characteristics of the wings and body of a dragonfly and of artificial wing models were studied by conducting two types of wind-tunnel tests and a number of free-flight tests of gliders made using dragonfly wings. The results were consistent between these different tests.
, Okamoto, , Yasuda, , Azuma
openaire   +2 more sources

Determination of Elastic Wing Aerodynamic Characteristics

Journal of the Aeronautical Sciences, 1952
The basic aeroelastic integral equation is formulated by treating the wing as a tapered cantilever beam mounted normal to its straight elastic axis. By means of an iterative process, a series solution is obtained for the aeroelastic change in angle-of-attack distribution. For sweptback wings, this Neumann solution fails to converge at dynamic pressures
Gaugh, William J., Slap, Joseph K.
openaire   +2 more sources

Wind tunnel tests on the aerodynamic characteristics of vehicles on highway bridges

, 2020
Accurately quantifying the aerodynamic forces acting on vehicles and long-span bridges is critical for assessing the safety of moving vehicles on bridges which are subjected to strong wind. It is necessary to consider the aerodynamic interference between
Xu-Hui He, Fanrong Xue, Yun-Feng Zou, Su-Ren Chen, Yan Han, B. Du, Xiangdong Xu, Baihu Ma   +7 more
semanticscholar   +1 more source

Aerodynamic Characteristics of Tracheostomy Speaking Valves

Journal of Speech, Language, and Hearing Research, 1993
Pressure-flow characteristics were determined for four different one-way valves used for speech production in the patient who has had a tracheotomy. Each valve was tested at steady-state flow rates of 150, 250, 350, and 450 ml/sec in isolation and attached to a tracheostomy tube. Results indicated significant differences in resistance among the valves.
L, Fornataro-Clerici, D J, Zajac
openaire   +2 more sources

Numerical study on the effect of a downstream braking plate on the detailed flow field and unsteady aerodynamic characteristics of an upstream braking plate with or without a crosswind

, 2020
A DDES based on the SST κ–ω turbulence model was used to simulate the aerodynamic characteristics of a braking plate, and the aerodynamic forces on the plate, the flow structure around the plate and the effect of opening a downstream plate on aerodynamic
J. Niu, Yue-Ming Wang, Feng Liu, Rui Li
semanticscholar   +1 more source

Nonlinear Aerodynamic Characteristics of Sounding Rockets J

Journal of Spacecraft and Rockets, 1970
Sounding rockets nonlinear aerodynamic characteristics from full scale and supersonic wind tunnel free flight data, using wobble ...
C. INGRAM, J. NICOLAIDES, D. TARKOWSKI
openaire   +1 more source

Aerodynamic characteristics of trills and phonological patterning

Journal of Phonetics, 2002
Abstract The present study attempts to characterize the aerodynamic conditions required for the production of apical trills and to account for some universal tendencies in the patterning of trills in terms of their aerodynamic and distinctiveness requirements.
openaire   +2 more sources

Aerodynamic characteristics of biplanes with winglets

Journal of Aircraft, 1987
This paper examines, both theoretically and experimentally, the possibility of improving the aerodynamic characteristics of a biplane configuration by adding winglets. Theoretical calculations show good agreement with experiment in predicting inviscid drag due to lift.
Peter D. Gall, Hubert C. Smith
openaire   +1 more source

Aerodynamic Characteristics of Rectangular Cylinders

International Journal of Computational Fluid Dynamics, 1999
Three and two-dimensional simulations of unsteady flows around a rectangular cylinder sectioned object are carried out by means of the IBTD + FS Finite Element technique without the use of a turbulence model. The three-dimensional simulations confirmed that the aerodynamic characteristics of a rectangular object with a side ratio of breadth/ depth (B/D)
H. HIRANO, S. WATANABE, A. MARUOKA, M. IKENOUCHI   +3 more
openaire   +1 more source