Burning Rate Constants and Microexplosion Phenomena Measurements of Droplet Combustion
Abstract: This study
investigates experimentally droplet
combustion in a
quiescent atmosphere using diesel
oil (DO), biodiesel
oil (BO), and
sunflower oil (SO). Symmetrically spherical
droplets with diameters
varying from 0.3
mm to 0.6 mm
are generated by a home-built
piezoelectrically-driven droplet
generator. Before a run,
the small droplet
is suspended at
the intersection of
two very fine horizontally-positioned, perpendicularly-aligned ceramic
fibers of 20
µm in diameter. A
run begins at
a time when
a diffusional flame
is just established
to envelop the suspended droplet using an
electrically-controlled and automatically-removed heating
device. A high-speed
camcorder is used
to record the
time evolution of droplet
burning process. Results
show that after
flame envelope the droplet
where initial diameter
(d0) is determined,
DO and BO
droplet instantaneous
diameters (d) just
shrink with increasing
time, where plot
for d 2 -law give
linear slope indicate
that DO and
BO can be assumed as
single-component fuel with
burning rate constants
value, but SO
which is multi-component fuels, give
two kinds slope
from d2-law plot indicate that there are two value
burning rate constants, namely K1 for
first stage of burning rate constant and K2 for second stage of burning rate
constant.
Author: Basthiyan Sidqi Fidari
Rosyadi, I Nyoman Gede Wardana
Journal Code: jptmesingg140001
