Matches in SemOpenAlex for { <https://semopenalex.org/work/W2015592274> ?p ?o ?g. }
Showing items 1 to 69 of
69
with 100 items per page.
- W2015592274 endingPage "355" @default.
- W2015592274 startingPage "347" @default.
- W2015592274 abstract "The objective of this study is to experimentally examine the magnitude and rate at which local flame chemistry responds to unsteady changes in imposed stretch rate. To achieve this objective, a time series of velocity field images was obtained using particle image velocimetry (PIV) diagnostics during the unsteady stretching, wrinkling, and local extinction of a laminar premixed flame by a counter-propagating toroidal vortex. The ∼10,000 velocity vectors per image in both the burned and unburned gases enable the measurement of local flame stretch rates and dilatation rate fields. Dilatation rates peak in the flamefront where the gas expands as its temperature increases. A new method is employed wherein the measured peak dilatation rate at each flame segment is used as an indicator of the local flame strength. It is found that the flame requires a relatively long time to be weakened by positive stretch, yet it is rapidly strengthened by negative stretch. Specifically, in regions where positive stretch rates are several times greater than that required to extinguish the steady flame, flame strength remains above 90% of its unstretched value for 1.2 laminar flame times, after which it drops quickly as extinction occurs. Interestingly, no such time lag is observed in regions of negative stretch, even though negative stretch magnitudes are always smaller. Flame strength is found to increase as soon as negative strain is applied, rising linearly to 240% of the unstretched value within one laminar flame time. This result indicates a significant dependence of flame chemistry on negative strain, a phenomenon that has not previously been experimentally quantified, and that may help explain observed increases in turbulent burning velocity above those produced by flame surface density increases alone." @default.
- W2015592274 created "2016-06-24" @default.
- W2015592274 creator A5016153406 @default.
- W2015592274 creator A5041032393 @default.
- W2015592274 creator A5048628150 @default.
- W2015592274 creator A5072278323 @default.
- W2015592274 date "1996-01-01" @default.
- W2015592274 modified "2023-09-24" @default.
- W2015592274 title "Effects of unsteady stretch on the strength of a freely-propagating flame wrinkled by a vortex" @default.
- W2015592274 cites W1966409938 @default.
- W2015592274 cites W2000535489 @default.
- W2015592274 cites W2002855149 @default.
- W2015592274 cites W2008903195 @default.
- W2015592274 cites W2013434250 @default.
- W2015592274 cites W2017200430 @default.
- W2015592274 cites W2027459807 @default.
- W2015592274 cites W2047450116 @default.
- W2015592274 cites W2051043686 @default.
- W2015592274 cites W2056131536 @default.
- W2015592274 cites W2063807005 @default.
- W2015592274 cites W2152202876 @default.
- W2015592274 doi "https://doi.org/10.1016/s0082-0784(96)80235-9" @default.
- W2015592274 hasPublicationYear "1996" @default.
- W2015592274 type Work @default.
- W2015592274 sameAs 2015592274 @default.
- W2015592274 citedByCount "38" @default.
- W2015592274 countsByYear W20155922742012 @default.
- W2015592274 countsByYear W20155922742013 @default.
- W2015592274 countsByYear W20155922742016 @default.
- W2015592274 countsByYear W20155922742017 @default.
- W2015592274 countsByYear W20155922742019 @default.
- W2015592274 crossrefType "journal-article" @default.
- W2015592274 hasAuthorship W2015592274A5016153406 @default.
- W2015592274 hasAuthorship W2015592274A5041032393 @default.
- W2015592274 hasAuthorship W2015592274A5048628150 @default.
- W2015592274 hasAuthorship W2015592274A5072278323 @default.
- W2015592274 hasConcept C121332964 @default.
- W2015592274 hasConcept C140820882 @default.
- W2015592274 hasConcept C192562407 @default.
- W2015592274 hasConcept C24890656 @default.
- W2015592274 hasConcept C57879066 @default.
- W2015592274 hasConcept C74650414 @default.
- W2015592274 hasConceptScore W2015592274C121332964 @default.
- W2015592274 hasConceptScore W2015592274C140820882 @default.
- W2015592274 hasConceptScore W2015592274C192562407 @default.
- W2015592274 hasConceptScore W2015592274C24890656 @default.
- W2015592274 hasConceptScore W2015592274C57879066 @default.
- W2015592274 hasConceptScore W2015592274C74650414 @default.
- W2015592274 hasIssue "1" @default.
- W2015592274 hasLocation W20155922741 @default.
- W2015592274 hasOpenAccess W2015592274 @default.
- W2015592274 hasPrimaryLocation W20155922741 @default.
- W2015592274 hasRelatedWork W1524385912 @default.
- W2015592274 hasRelatedWork W1640252531 @default.
- W2015592274 hasRelatedWork W1967674423 @default.
- W2015592274 hasRelatedWork W1991117595 @default.
- W2015592274 hasRelatedWork W2039073588 @default.
- W2015592274 hasRelatedWork W2060184384 @default.
- W2015592274 hasRelatedWork W2357804821 @default.
- W2015592274 hasRelatedWork W3043560244 @default.
- W2015592274 hasRelatedWork W3103805427 @default.
- W2015592274 hasRelatedWork W3111837623 @default.
- W2015592274 hasVolume "26" @default.
- W2015592274 isParatext "false" @default.
- W2015592274 isRetracted "false" @default.
- W2015592274 magId "2015592274" @default.
- W2015592274 workType "article" @default.