Fundamental flame velocities of pure hydrocarbons 2: alkadienes Page: 2 of 14
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TECH LIBRARY KAFS, NM
NACA RM E5025
NATIONAL AD ISORY COMMITTEE" FOR AERONAUTICS
0 FUNDAMENTAL FLAME VELOCITIES OF PURE B EROCARBONS
II - ALKADIENES
By Oscar Levine, Edgar L. Wong, and Melvin Gerstein
Data are presented for the fundamental flame velocities of 10 pure
alkadienes that have isolated, conjugated, or cumulative double-bond
systems. On the basis of this limited amount of data and the flame
velocities previously reported, it is concluded that unsaturation
changes the flame velocity in the order alkanes < alkenes < alkadienes
with isolated double bonds =" alkadienes with conjugated double
bonds < alkadienes with cumulative double bonds Z alkynes. There
were no significant differences in the flame velocities of cis and
trans 1,3-pentadiene. The alkadienes,l,2-pentadiene and 2,3-pentadiene,
with different positions of the cumulative double bond in the straight
chain, have similar flame velocities. Methyl substitution in a hydro-
carbon reduces the flame velocity; the extent of the reduction
increases with the degree of unsaturation of the hydrocarbon.
Reference 1 presented fundamental flame-velocity data, obtained
by a tube method, for 37 hydrocarbons including normal and branched
alkanes, alkenes, and alkynes; as well as cyclohexane and benzene. It
was concluded that unsaturation changes the flame velocity in the
order: alkanes < alkenes < alkynes, and that branching reduces the
This report extends the self-consistent set of fundamental
flame-velocity measurements reported in reference 1 with a series of
alkadienes for use in.correlations with flame-propagation theories
and combustor-performance. results.
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Levine, Oscar; Wong, Edgar L. & Gerstein, Melvin. Fundamental flame velocities of pure hydrocarbons 2: alkadienes, report, November 3, 1950; (https://digital.library.unt.edu/ark:/67531/metadc58618/m1/2/: accessed April 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.