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DTIC ADA161652: Performance Combustion Characteristics and Exhaust ...
by Defense Technical Information Center
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A CLR single cylinder diesel engine is used to determine
the effect of air content in the emulsified fuel on the
performance, exhaust emissions and ignition delay of
diesel engines. The experiments were conducted using
diesel fuel no. 2 and JP-4 as baseline fuels and
emulsions containing 15%, 30% and 45% water by volume.
The air charge temperature was varied from 88 F to 302 F.
The effects associated with use of the emulsions on
performance, ignition delay and exhaust emissions were
determined by making detailed measurements of fuel
consumption, engine operating parameters and exhaust
emissions. The results showed that slight improvement in
Brake Specific Fuel Consumption (BSFC) was observed when
emulsions with low water content were used at high
speeds. For high water content emulsions, the BSFC
increased. Heating the intake air increased the BSFC at
high engine loads and slightly improved it at low engine
loads. While the ignition delay was found to increase
with the increase of the water percentage in the
emulsion, preheating the air charge was effective in
reducing it. Although, NO sub x and soot formation were
reduced effectively with the increase of water content in
the emulsion, preheating the air charge adversely
affected NO sub x and soot emissions. While CO and VHC
emissions increased with the increase of the water
content in the emulsion, increasing the intake air
temperature slightly reduced carbon monoxide and unburned
hydrocarbons at low loads. Keywords: Combustion; Exhaust
emissions; Water/Oil emulsions.
Date Published: 2018-02-04 02:26:23
Identifier: DTIC_ADA161652
Item Size: 50644198
Language: english
Media Type: texts
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