Comparison of hexahedral, tetrahedral and polyhedral cells for reproducing the wind field around an isolated building by LES

In order to improve the accuracy of dynamic detection of wind field in the three-dimensional display space, system software is carried out on the actual scene and corresponding airborne radar observation information data, and the particle swarm algorithm fuzzy logic algorithm is introduced into the wind field dynamic simulation process in three-dimensional display space, to analyze the error of the filtering result in detail, to process the hurricane Lily Doppler radar measurement data with the optimal adaptive filtering according to the error data. The three-dimensional wind field synchronous measurement data obtained by filtering was compared with three-dimensional wind field synchronous measurement data of the GPS dropsonde in this experiment, the sea surface wind field measurement data of the multi-band microwave radiometer, and the wind field data at aircraft altitude.

Download Full-text

Study on modulation technology of highway regional wind field

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/626/1/012014 ◽

2021 ◽

Vol 626 ◽

pp. 012014

Author(s):

Y Y Li ◽

Y K He ◽

S F Hao ◽

Y Jia

Keyword(s):

Wind Field

Download Full-text

A high-fidelity parametric model for tropical cyclone boundary layer wind field by considering effects of land cover and terrain

Atmospheric Research ◽

10.1016/j.atmosres.2021.105701 ◽

2021 ◽

pp. 105701

Author(s):

Jian Yang ◽

Yu Chen ◽

Yanan Tang ◽

Guirong Yan ◽

Zhongdong Duan

Keyword(s):

Boundary Layer ◽

Tropical Cyclone ◽

Land Cover ◽

Wind Field ◽

Parametric Model ◽

High Fidelity ◽

Tropical Cyclone Boundary Layer

Download Full-text

Wind tunnel tests and dynamic analysis of wind-induced response of a transmission tower on a hill

Advances in Structural Engineering ◽

10.1177/13694332211033960 ◽

2021 ◽

pp. 136943322110339

Author(s):

Jian Guo ◽

Changliang Xiao ◽

Jiantao Li

Keyword(s):

Wind Tunnel ◽

Wind Field ◽

Dynamic Responses ◽

Interactive Effects ◽

Induced Response ◽

Transmission Tower ◽

Structural Dynamic ◽

Wind Tunnel Tests ◽

Hill Slope ◽

The Hill

A hill with a lattice transmission tower presents complex wind field characteristics. The commonly used computational fluid dynamics (CFD) simulations are difficult to analyze the wind resistance and dynamic responses of the transmission tower due to structural complexity. In this study, wind tunnel tests and numerical simulations are conducted to analyze the wind field of the hill and the dynamic responses of the transmission tower built on it. The hill models with different slopes are investigated by wind tunnel tests to measure the wind field characteristics, such as mean speed and turbulence intensity. The study shows that the existence of a transmission tower reduces the wind speed on the leeward slope significantly but has little effect on the windward slope. To study the dynamic behavior of the transmission tower, a hybrid analysis procedure is used by introducing the measured experimental wind information to the finite element tower model established using ANSYS. The effects of hill slope on the maximum displacement response of the tower are studied. The results show that the maximum value of the response is the largest when the hill slope is 25° compared to those when hill slope is 15° and 35°. The results extend the knowledge concerning wind tunnel tests on hills of different terrain and provide a comprehensive understanding of the interactive effects between the hill and existing transmission tower regarding to the wind field characteristics and structural dynamic responses.

Download Full-text

GANs enabled super-resolution reconstruction of wind field

Journal of Physics Conference Series ◽

10.1088/1742-6596/1669/1/012029 ◽

2020 ◽

Vol 1669 ◽

pp. 012029

Author(s):

Duy Tan Tran ◽

Haakon Robinson ◽

Adil Rasheed ◽

Omer San ◽

Mandar Tabib ◽

...

Keyword(s):

Wind Field ◽

Super Resolution

Download Full-text

Engineering Comprehensive Model of Complex Wind Fields for Flight Simulation

Aerospace ◽

10.3390/aerospace8060145 ◽

2021 ◽

Vol 8 (6) ◽

pp. 145

Author(s):

Jianwei Chen ◽

Liangming Wang ◽

Jian Fu ◽

Zhiwei Yang

Keyword(s):

Wind Field ◽

Three Dimensional ◽

Great Influence ◽

Spatial Location ◽

Flight Simulation ◽

Comprehensive Model ◽

Flight Trajectory ◽

Wind Fields ◽

Wind Field Simulation ◽

Low Level Jet

A complex wind field refers to the typical atmospheric disturbance phenomena existing in nature that have a great influence on the flight of aircrafts. Aimed at the issues involving large volume of data, complex computations and a single model in the current wind field simulation approaches for flight environments, based on the essential principles of fluid mechanics, in this paper, wind field models for two kinds of wind shear such as micro-downburst and low-level jet plus three-dimensional atmospheric turbulence are established. The validity of the models is verified by comparing the simulation results from existing wind field models and the measured data. Based on the principle of vector superposition, three wind field models are combined in the ground coordinate system, and a comprehensive model of complex wind fields is established with spatial location as the input and wind velocity as the output. The model is applied to the simulated flight of a rocket projectile, and the change in the rocket projectile’s flight attitude and flight trajectory under different wind fields is analyzed. The results indicate that the comprehensive model established herein can reasonably and efficiently reflect the influence of various complex wind field environments on the flight process of aircrafts, and that the model is simple, extensible, and convenient to use.

Download Full-text