摘要
The two-dimensional cellular detonation propagating in a channel with area-changing cross section was numerically simulated with the dispersion-controlled dissipative scheme and a detailed chemical reaction model. Effects of the flow ex-pansion and compression on the cellular detonation cell were investigated to illus-trate the mechanism of the transverse wave development and the cellular detona-tion cell evolution. By examining gas composition variations behind the leading shock,the chemical reaction rate,the reaction zone length,and thermodynamic parameters,two kinds of the abnormal detonation waves were identified. To explore their development mechanism,chemical reactions,reflected shocks and rarefac-tion waves were discussed,which interact with each other and affect the cellular detonation in different ways.
The two-dimensional cellular detonation propagating in a channel with area-changing cross section was numerically simulated with the dispersion-controlled dissipative scheme and a detailed chemical reaction model. Effects of the flow ex-pansion and compression on the cellular detonation cell were investigated to illus-trate the mechanism of the transverse wave development and the cellular detona-tion cell evolution. By examining gas composition variations behind the leading shock,the chemical reaction rate,the reaction zone length,and thermodynamic parameters,two kinds of the abnormal detonation waves were identified. To explore their development mechanism,chemical reactions,reflected shocks and rarefac-tion waves were discussed,which interact with each other and affect the cellular detonation in different ways.
关键词
detonation
cells
transverse
waves
detailed
chemical
reaction
model
numerical
simulation
detonation
cells,
transverse
waves,
detailed
chemical
reaction
model,
numerical
simulation
The
two-dimensional
cellular
detonation
propagating
in
a
channel
with
area-
changing
cross
section
was
numerically
simulated
with
the
dispersion-controlled
dissipative
scheme
and
a
detailed
chemical
reaction
model.
Effects
of
the
flow
expansion
and
compression
on
the
cellular
detonation
cell
were
investigated
to
illustrate
the
mechanism
of
the
transverse
wave
development
and
the
cellular
detonation
cell
evolution.
By
examining
gas
composition
variations
behind
the
leading
shock,
the
chemical
reaction
rate,
the
reaction
zone
length,
and
thermodynamic
parameters,
two
kinds
of
the
abnormal
detonation
waves
were
identified.
To
explore
their
development
mechanism,
chemical
reactions,
reflected
shocks
and
rarefaction
waves
were
discussed,
which
interact
with
each
other
and
affect
the
cellular
detonation
in
different
ways.
……
