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Evaluation of a new method for puff arrival time as assessed through wind tunnel modelling
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SYSNO ASEP 0483047 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Evaluation of a new method for puff arrival time as assessed through wind tunnel modelling Author(s) Chaloupecká, Hana (UT-L) RID, ORCID, SAI
Jaňour, Zbyněk (UT-L) RID, ORCID
Mikšovský, J. (CZ)
Jurčáková, Klára (UT-L) RID, ORCID
Kellnerová, Radka (UT-L) RID, ORCIDSource Title Process Safety and Environmental Protection. - : Elsevier - ISSN 0957-5820
Roč. 111, October (2017), s. 194-210Number of pages 17 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords wind tunnel ; short-term gas leakage ; puff Subject RIV DG - Athmosphere Sciences, Meteorology OECD category Meteorology and atmospheric sciences R&D Projects GA15-18964S GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 UT WOS 000414619500021 EID SCOPUS 85024906446 DOI https://doi.org/10.1016/j.psep.2017.07.006 Annotation Deliberate or accidental gas leakages threaten people′s lives. Short-duration releases of gas are influenced by actual phase of turbulent atmospheric flow and therefore the study of these situations requires multiple repetitions of the leakage under the same mean conditions. Such a set of experiments was conducted in a wind tunnel on a scaled model of an idealized urban canopy created by rectangular buildings with pitched roofs organized into closed courtyards. Concentration time series of high time resolution were measured by a fast flame ionisation detector. The arrival time of gas from short-duration discharges was investigated at a few places of detection. This paper introduces a new method of defining gas arrival time, one not only applicable in the post-processing analysis but also in the operative stage. Moreover, it shows the results of other commonly used gas arrival time definitions (visual and dosage methods and a method utilizing the maximum detected concentration). It was explored both, the change in the arrival time value in individual realisations and places as well as the change in statistical values calculated from ensembles (mean, median, quartiles). Furthermore, the dependence of the definitions of arrival time on their parameters is discussed. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2018
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