Search: onr:"swepub:oai:DiVA.org:umu-206277" >
Theory of flame acc...
-
Akkerman, V'yacheslavCenter for Alternative Fuels, Engines and Emission (CAFEE), Department of Mechanical and Aerospace Engineering, West Virginia University, WV, Morgantown, United States
(author)
Theory of flame acceleration in open/vented obstructed pipes
- Article/chapterEnglish2016
Publisher, publication year, extent ...
-
Eastern States Section of the Combustion Institute,2016
-
printrdacarrier
Numbers
-
LIBRIS-ID:oai:DiVA.org:umu-206277
-
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-206277URI
Supplementary language notes
-
Language:English
-
Summary in:English
Part of subdatabase
Classification
-
Subject category:ref swepub-contenttype
-
Subject category:kon swepub-publicationtype
Notes
-
A shockless, conceptually-laminar formulation on extremely fast flame acceleration in semi-open obstructed pipes [Physical Review Letters 101 (2008) 164501; Combust. Flame 157 (2010) 1012], Refs. [8-9] is extended to pipes with both ends open/vented. The acceleration is devoted to a powerful jet-flow produced by delayed combustion in the pockets between the obstacles, and it leads to a prompt deflagration-to-detonation transition event. Starting with inviscid approximation, the analysis subsequently incorporates the viscous forces (hydraulic resistance). The theory is validated by the recent experiments [http://arxiv.org/abs/1208.6453], Ref. [11]. It is shown that hydraulic resistance is not required to drive the flame acceleration. In contrast, this is a supplementary effect, which actually moderates the acceleration rate. On the other hand, hydraulic resistance plays an important role: it is responsible for the initial delay, before the flame acceleration onset, observed in the experiments. It is demonstrated that flames accelerate strongly in open/vented obstructed pipes, and the acceleration mechanism is qualitatively the same as that in the semi-open ones. However, because of the flame-generated flow distributed upward and downward of the flame front, the acceleration rate in open pipes is noticeably less than that in the semi-open ones.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Sadek, JadCenter for Alternative Fuels, Engines and Emission (CAFEE), Department of Mechanical and Aerospace Engineering, West Virginia University, WV, Morgantown, United States
(author)
-
Bychkov, Vitaly,1968-Umeå universitet,Institutionen för fysik(Swepub:umu)viby0001
(author)
-
Center for Alternative Fuels, Engines and Emission (CAFEE), Department of Mechanical and Aerospace Engineering, West Virginia University, WV, Morgantown, United StatesInstitutionen för fysik
(creator_code:org_t)
Related titles
-
In:2016 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2016: Eastern States Section of the Combustion Institute
Internet link
To the university's database