Digitalni repozitorij raziskovalnih organizacij Slovenije

Izpis gradiva
A+ | A- | Pomoč | SLO | ENG

Naslov:The effect of duct size, sample size, and fuel composition on concurrent flame spread over large cellulose samples in microgravity
Avtorji:ID Olson, Sandra L. (Avtor)
ID Ruff, Gary A. (Avtor)
ID Ferkul, Paul V. (Avtor)
ID Owens, Jay C. (Avtor)
ID Easton, John (Avtor)
ID Liao, Ya-Ting T. (Avtor)
ID T'ien, James S. (Avtor)
ID Toth, Balazs (Avtor)
ID Jomaas, Grunde (Avtor)
ID Fernandez-Pello, A. Carlos (Avtor)
ID Legros, Guillaume (Avtor)
ID Guibaud, Augustin (Avtor)
ID Fujita, Osamu (Avtor)
ID Smirnov, Nikolay (Avtor)
ID Urban, David L. (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://www.sciencedirect.com/science/article/pii/S0010218022005673
 
.pdf PDF - Predstavitvena datoteka, prenos (2,13 MB)
MD5: 70148DDD994A7ADB1A99975380A003AC
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo ZAG - Zavod za gradbeništvo Slovenije
Povzetek:Concurrent flame spread data for thermally-thin charring solid fuels are presented from Saffire and BASS experiments performed in habitable spacecraft for three duct sizes, five sample sizes, two materials, and two atmospheres. The flame spread rates and flame lengths were strongly affected by duct size even for the relatively large ducts (> 30 cm tall). A transient excess pyrolysis length (i.e., flame length overshoot) was observed for the cotton fabric that burned away, which indicates that the transient excess pyrolysis length phenomenon is caused by more than just the flame moving into the developing boundary layer thickness as was the case with the SIBAL sample. A burnout time, defined as the pyrolysis length divided by the flame spread rate, normalized the pyrolysis length histories into a single curve with a steady burnout time of 22 s for the SIBAL fabric. The transient excess pyrolysis length is hypothesized to be a post-ignition flame growth transient for the essentially two-dimensional flames where the burnout time becomes very long until the preheat and pyrolysis lengths develop. The three-dimensional flames over narrow samples have lateral thermal expansion and lateral oxygen diffusion which allows them to transition to a steady state length without the transient excess pyrolysis length. Surface temperature profiles, nondimensionalized by the pyrolysis length, indicate that the temperature profiles exhibit the same shape across the pyrolysis zone. A surface energy balance calculation in the preheat region revealed that the heat flux increased rapidly at the pyrolysis front to near the critical heat flux for ignition. An estimate of the acceleration of the inviscid core flow in the duct due to thermal expansion and developing boundary layers on the duct walls and the SIBAL sample surface seems to explain the observed spread rate trends across three duct sizes and multiple sample sizes.
Ključne besede:concurrent flame spread, microgravity, duct size, sample size, cellulose fabrics
Status publikacije:Objavljeno
Verzija publikacije:Recenzirani rokopis
Datum objave:22.12.2022
Založnik:Elsevier Science
Leto izida:2023
Št. strani:str. 1-14
Številčenje:Vol. 248, [article no.] 112559
PID:20.500.12556/DiRROS-17650 Novo okno
UDK:62
ISSN pri članku:1556-2921
DOI:10.1016/j.combustflame.2022.112559 Novo okno
COBISS.SI-ID:143621379 Novo okno
Avtorske pravice:© 2022 Elsevier Ltd. All rights reserved
Opomba:Nasl. z nasl. zaslona; Opis vira z dne 1. 3. 2023;
Datum objave v DiRROS:08.01.2024
Število ogledov:688
Število prenosov:157
Metapodatki:XML DC-XML DC-RDF
:
OLSON, Sandra L., RUFF, Gary A., FERKUL, Paul V., OWENS, Jay C., EASTON, John, LIAO, Ya-Ting T., T’IEN, James S., TOTH, Balazs, JOMAAS, Grunde, FERNANDEZ-PELLO, A. Carlos, LEGROS, Guillaume, GUIBAUD, Augustin, FUJITA, Osamu, SMIRNOV, Nikolay in URBAN, David L., 2023, The effect of duct size, sample size, and fuel composition on concurrent flame spread over large cellulose samples in microgravity. Combustion and flame [na spletu]. 2023. Vol. 248,  112559, p. 1–14. [Dostopano 12 april 2025]. DOI 10.1016/j.combustflame.2022.112559. Pridobljeno s: https://dirros.openscience.si/IzpisGradiva.php?lang=slv&id=17650
Kopiraj citat
  
Objavi na:Bookmark and Share


Postavite miškin kazalec na naslov za izpis povzetka. Klik na naslov izpiše podrobnosti ali sproži prenos.

Gradivo je del revije

Naslov:Combustion and flame
Založnik:Elsevier Science
ISSN:1556-2921
COBISS.SI-ID:21293334 Novo okno

Gradivo je financirano iz projekta

Financer:EC - European Commission
Program financ.:H2020
Številka projekta:952395
Naslov:Fire-safe Sustainable Built Environment
Akronim:FRISSBE
Financer:Drugi - Drug financer ali več financerjev
Številka projekta:0580–2021–0021
Naslov:Development of algorithms and codes for multiscale processes and combustion simulations

Licence

Licenca:CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
Začetek licenciranja:01.02.2023
Vezano na:Text and Data Mining valid from 2023-02-01 Accepted Manuscript valid from 2023-12-22

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:sočasno širjenje plamena, mikrogravitacija, velikost kanalov, velikost vzorca, celulozne tkanine


Nazaj