Numerical simulation and analysis of aero-optical effect of the 3D side window

In this paper, k-Omega turbulence model is applied in the numerical simulation of the transit bus, several typical working conditions of the transit bus with windows open at a speed of 10m/s are investigated, and a custom function Q is introduced to characterize the amount of ventilation of each window. The results show that, when the transit bus travels with windows open, the air always flows into the carriage through the middle and rear side windows of the transit bus, and circulates in the carriage and then flows out of the carriage through the front side window. When the bus travels with sunroofs open in leeward mode and side windows open, the amount of ventilation is the maximum. This working condition is the best one when taking both drag coefficient and the amount of ventilation.

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Wind Tunnel Experiment and Numerical Simulation of the Pressure Distribution on a Sedan Exterior Surface

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.300-301.1027 ◽

2013 ◽

Vol 300-301 ◽

pp. 1027-1031

Author(s):

Bo Yang ◽

Li Na Huang ◽

De Jiu Wu ◽

Xing Jun Hu

Keyword(s):

Numerical Simulation ◽

Wind Tunnel ◽

Pressure Distribution ◽

Cfd Simulation ◽

Wind Tunnel Experiment ◽

Aerodynamic Noise ◽

Computational Domain ◽

Side View ◽

Side Window ◽

Near Wall

The wind tunnel measurement and numerical simulation of a 50% scaled sedan model surface pressure distribution were made in order to provide fundamental data for improving the Computational Fluid Dynamics (CFD) simulation accuracy of the aerodynamic noise related flow field around automobiles. The pressure measurement positions of the wind tunnel experiment were on the side window and the door. The wind tunnel test section speed was 30m/s at 0° yawing angle. As for the CFD simulation, the wind tunnel shape computational domain and four settings of the near wall computational mesh were made. Both the k-ω SST and the Realizable k-ε turbulence models were chosen. And three value ranges of the near wall computational mesh’s dimensionless wall distance (y+) were realized. Compared with the experimental data, the pressure coefficient (CP) simulation results showed good agreement with the measurement at the re-attaching region on the side window and the attaching region on the door. But the large CPprediction errors happened in the region of the front pillar vortex, the side view mirror wake. It was also shown that the predicted CPvalues were almost independent of the y+value, except the comparatively larger CPpredicted errors on the side window obtained by using the k-ω SST turbulent model when the y+value ranged from 4 to 7. Further unsteady CFD simulation and the exterior aerodynamic noise measurement need be carried out due to the unsteady features of the separated flows, including the front pillar vortex and the side view mirror wake.

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Method of Investigation for Numerical Simulation on Aero-Optical Effect Based on WCNS-E-5

AIAA Journal ◽

10.2514/1.j057961 ◽

2019 ◽

Vol 57 (5) ◽

pp. 2017-2029 ◽

Cited By ~ 7

Author(s):

Xi-Wan Sun ◽

Wei Liu ◽

Zhen-Xia Chai

Keyword(s):

Numerical Simulation ◽

Optical Effect

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Numerical simulation of automobile side-window buffeting noise based on fluid–structure interaction

Applied Acoustics ◽

10.1016/j.apacoust.2014.11.003 ◽

2015 ◽

Vol 90 ◽

pp. 126-137 ◽

Cited By ~ 6

Author(s):

Zhengqi Gu ◽

Yiqi Zong ◽

Zemin Luo ◽

Zhendong Yang ◽

Caimao Jiang ◽

...

Keyword(s):

Numerical Simulation ◽

Fluid Structure Interaction ◽

Side Window ◽

Fluid Structure ◽

Structure Interaction

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Monochromatic Images of Sunspots in Linearly Polarized Radiation and Structure of their Magnetic Fields

International Astronomical Union Colloquium ◽

10.1017/s0252921100028906 ◽

1993 ◽

Vol 141 ◽

pp. 115-118

Author(s):

Ye Shi-Hui ◽

Jin Jie-Hai

Keyword(s):

Numerical Simulation ◽

Magnetic Fields ◽

Stokes Parameters ◽

Optical Effect ◽

Complicated Structure ◽

Spot Center ◽

Linearly Polarized ◽

Magneto Optical Effect ◽

Linearly Polarized Radiation ◽

Polarized Radiation

AbstractThe monochromatic images of unipolar sunspots in the Stokes parameters Q and U of magneto-sensitive lines display a complicated structure. This is caused by the magneto-optical effect and also connected with the 3-D structure of spot magnetic fields. In the process of numerical simulation it is possible to check the regularities of the change of the angle of inclination of magnetic lines of force with distance from spot center.

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