Wind Tunnel Investigation of the Wind Patterns in the Launching Pad Area of the Brazilian Alcântara Launch Center

Faria, Amanda Felippe; Avelar, Ana Cristina; Fisch, Gilberto

doi:10.5028/jatm.v11.996

Cited by 2 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The incident velocity direction was 70° (North-Northeast, NNE, mean wind direction obtained by reanalyzed data), which agrees with the prevailing winds of the ALC: northeast and east winds (Fisch 2010;Medeiros et al 2013). Some tests were carried out and the inlet turbulence intensity obtained for the convergence and validation of the simulation was determined by 5% (κ and ε were 0.17 m 2 •s -2 and 2.80 10 -4 m 2 •s -2 , respectively), the same value obtained for the wind tunnel measurements (Faria et al 2019) and close to observational values obtained by Fisch (1999).…”

Section: Boundary Conditionssupporting

confidence: 75%

“…A reverse flow region is formed upstream the obstacle with velocities below 2.5 m•s -1 and negative velocities close to -1.0 m•s -1 . As obtained by Faria et al (2019), downstream the cliff is a recirculation zone that extends up to the TMI. This behavior of the flow crossing a step were also observed in Essel and Tachie (2017) and in Wu and Ren (2013).…”

Section: Resultsmentioning

confidence: 62%

“…Wind tunnel tests were also developed using simplifications of the local geometry like flat and smooth terrain (Faria et al 2019;Pires et al 2010;2009). In these experiments, the abrupt change of topography was considered representing the cliff as a step with different inclinations.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Atmospheric Flow at Alcantara Launch Center

Klippel

Goulart

Fisch

et al. 2022

J. Aerosp. Technol. Manag.

Self Cite

View full text Add to dashboard Cite

The Alcantara Launch Center (ALC) is the main Brazilian access to space. It is positioned over a complex terrain, and it has some important buildings for assembling, integration and launching activities, such as the Mobile Integration Tower. Being in a region of prevalent trade winds, the flow interaction between the complex terrain and the buildings can affect the safety of operations on the platform, and the dispersion of toxic gases emitted during the launching. The main objective of this work was to study the influence of topography and buildings on the atmospheric flow of ALC using computational fluid dynamics (CFD) techniques. Three geometries were considered: simplified terrain (case 1), smooth complex terrain (case 2), and roughness complex terrain (case 3). The flow conditions over ALC were simulated using the ANSYS Fluent 19.0 CFD commercial code. The numerical simulations used a realizable κ-ε to model turbulence effects and the results presented a good agreement with the in-situ field measurements for the most complex geometry (case 3). The topography clearly influences the flow pattern at ALC, with the cliff influence over the wind being the major cause for establishing the flow patterns.

show abstract

Section: Boundary Conditionssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 62%

See 1 more Smart Citation

Atmospheric Flow at Alcantara Launch Center

Klippel

Goulart

Fisch

et al. 2022

J. Aerosp. Technol. Manag.

Self Cite

View full text Add to dashboard Cite

show abstract

“…According to the guidelines on best practices for applying PIV/SPIV in towing tanks and cavitation tunnels [9], the nominal spatial resolution value would be between 5 and 20 pixels/mm², and consequently the pixel length between 223 µm to 447 µm. However, another studies [16][17][18][19][20] considered applying the PIV technique in a wind tunnel with different FOV, so that the pixel length varies between 5 µm and 200 µm.…”

Section: Image Acquisition Systemmentioning

confidence: 99%

Experimental Particle Image Velocimetry Apparatus with Known Displacement of Synthetic Particles

Girardi,

Júnior,

Fonseca

et al. 2023

Preprint

View full text Add to dashboard Cite

The study of velocimetry is important for characterizing and comprehending the effects of fluid flow, and the Particle Image Velocimetry (PIV) technique is one of the primary approaches for understanding the velocity vector field in a test section. Commercial PIV systems are expensive, with one of the main cost factors being high-speed camera equipment capable of capturing images at high frames per second (fps), rendering them impractical for many applications. This study proposes an evaluation of utilizing smartphones as image acquisition systems for PIV technique application. An experimental setup inspired by the known angular displacement of synthetic particles is proposed. A stepper motor rotates a plate containing an image of synthetic particles on its surface. The motion of the plate is captured by the smartphone camera, and the images are processed using PIVlab-MatLab® software. The use of two smartphones is assessed, with acquisition rates of either 240 fps or 960 fps and varying angular velocities. The results were satisfactory for velocities up to 0.7 m/s at an acquisition rate of 240 fps and up to 1.8 m/s at 960 fps, validating the use of smartphones as a cost-effective alternative for the PIV technique.

show abstract

Wind Tunnel Investigation of the Wind Patterns in the Launching Pad Area of the Brazilian Alcântara Launch Center

Cited by 2 publications

References 6 publications

Atmospheric Flow at Alcantara Launch Center

Atmospheric Flow at Alcantara Launch Center

Experimental Particle Image Velocimetry Apparatus with Known Displacement of Synthetic Particles

Contact Info

Product

Resources

About