Atmospheric flow measurements using the PIV and HWA techniques

Pires, Luciana Bassi Marinho; Roballo, Suelen T.; Fisch, Gilberto; Avelar, Ana Cristina; Girardi, R.; Gielow, Ralf

doi:10.5028/jatm.2010.02027410

Cited by 6 publications

(6 citation statements)

References 7 publications

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“…That is, an increase of over 0.1 u/U _ . In general, the same pattern was observed in Pires et al (2010). The authors observed that on the cliff, the mean flow is disturbed and accelerated.…”

Section: Resultssupporting

confidence: 66%

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Atmospheric Flow at Alcantara Launch Center

Klippel

Goulart

Fisch

et al. 2022

J. Aerosp. Technol. Manag.

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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.

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Section: Resultssupporting

confidence: 66%

“…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%

Atmospheric Flow at Alcantara Launch Center

Klippel

Goulart

Fisch

et al. 2022

J. Aerosp. Technol. Manag.

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“…This work was done at Departamento de Ciência e Tecnologia Aeroespacial (DCTA) wind tunnel to give support for the analysis of the atmospheric flow and turbulence at Alcantara Launching Center (ALC). This is an ongoing project that aims to develop technical tools for Aerospace Meteorology associated with the launching of the Satellite Vehicle Launcher (VLS) within the Brazilian Space Program (Pires et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Simulations of the Atmospheric Boundary Layer in a Wind Tunnel with Short Test Section

Pires

Paula

Fisch

et al. 2013

J.Aerosp. Technol. Manag.

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This article presents a study of three different passive devices (spires, screens, and a carpet) separately and in various combinations, to simulate the atmospheric boundary layer (ABL) in a wind tunnel with a short test chamber (465×465x1200mm). The influence of distances between these devices on the formation of the ABL is established, and optimization of variation of thicknesses of the screens (thin, medium, and coarse) on pressure loss is explored. The results obtained in this work gave support for the analysis of the atmospheric flow and turbulence at Alcantara Launching Center (ALC) in order to launch Brazilian space vehicles under safe conditions. The results show that the "spires" and the thin screen are the devices that require the least area to form an ABL in a test chamber. The physical proximity of two devices (the spires and the medium screen) also influences the size of the ABL formed, which varies from 180 to 200 mm. The power law exponent ranged from 0.12 up to 0.14 after the insertion of a carpet.

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“…15 and previous wind tunnel measurements, Ref. 18. A comprehensive turbulence analysis will be presented in a further publication.…”

Section: Piv Measurementsmentioning

confidence: 98%