Evaluation of a new method for puff arrival time as assessed through wind tunnel modelling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F17%3A00483047" target="_blank" >RIV/61388998:_____/17:00483047 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/17:10369053

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.psep.2017.07.006" target="_blank" >http://dx.doi.org/10.1016/j.psep.2017.07.006</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.psep.2017.07.006" target="_blank" >10.1016/j.psep.2017.07.006</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of a new method for puff arrival time as assessed through wind tunnel modelling

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Evaluation of a new method for puff arrival time as assessed through wind tunnel modelling

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

<a href="/cs/project/GA15-18964S" target="_blank" >GA15-18964S: Experimentální výzkum organizovaných struktur v turbulentní mezní vrstvě s vnější turbulencí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Process Safety and Environmental Protection

ISSN

0957-5820

e-ISSN

—

Svazek periodika

111

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

194-210

Kód UT WoS článku

000414619500021

EID výsledku v databázi Scopus

2-s2.0-85024906446