Uso do Modelo WRF-CHEM para a Simulação da Dispersão de Gases no Centro de Lançamento de Alcântara.

Iriart, Paulo; Fisch, Gilberto

doi:10.1590/0102-7786312314b20150105

Cited by 3 publications

(4 citation statements)

References 24 publications

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“…These cases are summarized in Table 4. In these periods, there were no anomalies of climatic conditions (such as temperature, precipitation, wind or humidity) in the state of Maranhão, representing the synoptic conditions typical for both dry and rainy seasons (Iriart & Fisch, 2016).…”

Section: Data and Simulated Resultsmentioning

confidence: 96%

“…Table 6 shows a summary of the concentration peak (from simulations) and atmospheric state (from observed data) for all simulated cases. The peak concentration for each site is presented first, followed by the transport time from the plume, wind speed and direction, and the turbulent intensity (σ U /U, where σ U is the standard deviation of the wind speed) calculated at levels of 10 and 60 m with an anemometer tower data installed at the SPL, close to the TMI (Iriart & Fisch, 2016).…”

Section: Data and Simulated Resultsmentioning

confidence: 99%

“…Nascimento et al (2014 coupled this model to the Weather Research and Forecasting Model (WRF) for meteorological forecasting; and to the Community Multi-Scale Air Quality model (CMAQ) for the chemistry module. Moreover, Iriart and Fisch (2016) used the WRF coupled to the chemistry module (Chem) (Grell et al, 2005) to estimate the surface instantaneous carbon monoxide (CO) emission and dispersion at the CLA. Both studies addressed the dispersion problem for numerical air-quality models.…”

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confidence: 99%

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Rocket emissions representation in atmospheric air‐quality models: The short‐range atmospheric transport and reaction of gases released by solid propellant engines

Schuch

Fisch

2018

Meteorological Applications

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One risk associated with rocket‐launching activities is the inhalation of exhaust gases, which can occur either in the vicinity of the launch pad or, depending on the way these gases are transported and dispersed through the atmosphere, at locations far from the launch pad. Immediately after the ignition of the rocket motors, a large, hot cloud is formed near the ground, composed of carbon monoxide (CO) and carbon dioxide (CO2), hydrogen chloride (HCl) and also particulate material composed of aluminium oxide (Al2O3) in the case of rockets driven by a solid propellant. The Weather Research and Forecasting Model (WRF), an atmospheric mesoscale model, was modified in the present study to simulate the transport, dispersion and chemistry mechanisms (with the addition of reactions involving HCl and other chlorinated compounds) of these gases released during a launch. Simulations of the dispersion of effluents were performed for different rainfall regimes (dry and rainy periods) as well as for atmospheric thermal stability (day‐ and night‐time conditions) for a specific rocket (the Veículo Lançador de Satélites, VLS) at Brazil's Alcântara Launch Center (Centro de Lançamento de Alcântara, CLA). The results show that the most critical levels of HCl and CO occurred on the launch pad (Setor de Preparação de Lançamento, SPL) from the time of the launch (t0) to 10 min. The village of Alcântara, which is 9 km from the launch pad, could be affected according to the wind direction. The concentration of HCl reached a level in the range of 2200–3800 ppmv for both dry and wet periods respectively, and these concentrations can be very hazardous to humans.

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Section: Data and Simulated Resultsmentioning

confidence: 96%

Section: Data and Simulated Resultsmentioning

confidence: 99%

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confidence: 99%

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Rocket emissions representation in atmospheric air‐quality models: The short‐range atmospheric transport and reaction of gases released by solid propellant engines

Schuch

Fisch

2018

Meteorological Applications

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“…Furthermore, such analyses are of great importance in the cases of launching accidents that would result in larger amounts of pollutant gases. Iriart and Fisch (2016) and Schuch and Fisch (2017) observed that the wind advection is a major meteorological factor that influences the pollutants dispersion at the ALC. Therefore, the knowledge of the flow pattern is essential to establish the atmospheric dispersion conditions to which the ALC is exposed and provide the necessary basis for studies of the dispersion of pollutants emitted during rocket launches.…”

Section: Introductionmentioning

confidence: 99%

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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A Preliminary Study of the Evaluation of Air Quality for the Metropolitan Region of Salvador Using Photochemical Model WRF-Chem

Palmeira¹,

Silva²

2020

Blucher Engineering Proceedings

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The metropolitan region of Salvador (RMS), Bahia, Brazil, lacks studies on the transport of air pollutants using air quality models. In this sense, this work seeks to carry out a preliminary study of the transport of pollutants in the RMS using an inventory of vehicle emissions for the year 2015, based on the methodology available in the literature (National Inventory of Atmospheric Emissions by Road Motor Vehicles). For the analysis of particulate matter emissions (MP10), the integrated modeling system WRF-SMOKE-CMAQ was used. The simulations showed maximum values of 15 μg/m 3 and 12 μg/m 3 for 7 am and 1 pm, on June 30, 2015, respectively. Although simulations are presented for just one day, the results show the importance of these studies as a tool to help manage air quality.

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Uso do Modelo WRF-CHEM para a Simulação da Dispersão de Gases no Centro de Lançamento de Alcântara.

Cited by 3 publications

References 24 publications

Rocket emissions representation in atmospheric air‐quality models: The short‐range atmospheric transport and reaction of gases released by solid propellant engines

Rocket emissions representation in atmospheric air‐quality models: The short‐range atmospheric transport and reaction of gases released by solid propellant engines

Atmospheric Flow at Alcantara Launch Center

A Preliminary Study of the Evaluation of Air Quality for the Metropolitan Region of Salvador Using Photochemical Model WRF-Chem

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