Abstract:
Experimental investigation was conducted on stati.onary fuel droplets in order to study" the e~aporation rate and combustion
rate of fuel droplets at different temperature levels and
the influence of neighbouring drops on the evaporation and combustion
rate of fuel droplets, the distance between the droplets
being 0.15 to 0.3 cm.
The experimental set up consisted mainly of an electri.c
tube furnace , electronic stroboscope used in conjunction with
a stationary film camera and quartz fibres for holding the fuel
droplets.
Fuel droplets were suspended from quartz fibres and introduced
into the hot electric furneee ( ambient gas being quies
cent air), and the rate of decrease of droplet diameter is
recorded on the photographic film. From the silhouete of the
droplet diameter the necessary calculation were made to
determine the evaporation and combustion rates.
From the experimental investigations it has been found
that for each of the droplets in single,double and triple droplet
arrays the square of the droplet diameter varies linearly with
time both during evpporation and combustion.Again for similar
experimental conditions, the evaporation constant for each of
the droplets in double and triple arrays has been found to be
lower than that of the single droplet thus showing the influence
of droplet interaction on the evaporation rate.It has also
been observed that the droplet interaction modifies the burning
rate of fuel droplets.
In this investigation only single,double and triple
droplet arrays have been studied. Further extensive work is
necessary with a variety of droplet arrangement in order to
write ,,",sa,blel formula' for evaporating and burning
fuel droplets.
