New fast field programs for anisotropic sound propagation through an atmosphere with a wind velocity profile

1994 ◽  
Vol 95 (2) ◽  
pp. 718-726 ◽  
Author(s):  
Y. L. Li ◽  
Michael J. White ◽  
S. J. Franke
Keyword(s):  
Velocity Profile ◽  
Wind Velocity ◽  
Sound Propagation ◽  
Fast Field

A numerical approach for the assessment of crosswind effects on barrier-protected trains running on bridges

2021 ◽  
Author(s):  
Giuseppe Porpiglia ◽  
Paolo Schito ◽  
Tommaso Argentini ◽  
Alberto Zasso
Keyword(s):  
Wind Tunnel ◽  
Velocity Profile ◽  
Wind Velocity ◽  
Aerodynamic Force ◽  
Numerical Approach ◽  
Aerodynamic Performance ◽  
Vehicle Speed ◽  
Initial Condition ◽  
Cfd Analyses ◽  
Moving Train

<p>This paper introduces a new methodology to assess the influence of a windscreen on the crosswind performance of trains running on a bridge. Considering the difficulties encountered in both carrying out wind tunnel tests that consider the vehicle speed or complete CFD analyses, a simplified CFD approach is here discussed. Instead of simulating simultaneously the windscreen plus the moving train, the numerical problem is split into two parts: firstly, a simulation of the windshield alone is used to extract the perturbed velocity profile at the railway location; secondly, this profile used as an inlet condition for the wind velocity acting on an isolated train. The method is validated against a complete train plus windshield simulation in terms of pressure distribution and aerodynamic force coefficients on the train, and flow streamlines. This approach opens to the possibility of evaluating the aerodynamic performance of a vehicle on bridges considering bridge and vehicle as separated. Wind velocity profiles measured on the bridge during a wind tunnel campaign could be used as the initial condition for numerical simulations on vehicles.</p>

The urban wind velocity profile

1971 ◽  
Vol 5 (8) ◽  
pp. 733
Author(s):  
J. Counihan
Keyword(s):  
Velocity Profile ◽  
Wind Velocity

An experimental study of a plasma actuator in absence of free airflow: Ionic wind velocity profile

2010 ◽  
Vol 17 (8) ◽  
pp. 083503 ◽  
Author(s):  
R. Mestiri ◽  
R. Hadaji ◽  
S. Ben Nasrallah
Keyword(s):  
Experimental Study ◽  
Velocity Profile ◽  
Wind Velocity ◽  
Plasma Actuator ◽  
Ionic Wind

Passive A-band Wind Sounder (PAWS) for measuring tropospheric wind velocity profile

2007 ◽  
Author(s):  
Grzegorz Miecznik ◽  
Robert Pierce ◽  
Pei Huang ◽  
Philip A. Slaymaker ◽  
Paul Kaptchen ◽  
...  
Keyword(s):  
Velocity Profile ◽  
Wind Velocity ◽  
Tropospheric Wind

An analytic expression for wind-velocity profile within the saltation layer

Geomorphology ◽  
2004 ◽  
Vol 60 (3-4) ◽  
pp. 359-369 ◽  
Author(s):  
Z.S. Li ◽  
J.R. Ni ◽  
C. Mendoza
Keyword(s):  
Velocity Profile ◽  
Wind Velocity ◽  
Analytic Expression
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