Study on the effects of alternative-kerosene fuel mixture on combustion spray characteristics for different spray half cone angle
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Date
2018-06
Authors
Farah Syafiqah Roslan
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Abstract
This study focuses on simulating a two-dimensional (2D) case of a simple
cylindrical combustion chamber to study the effects of alternative-kerosene fuel mixture on
combustion spray characteristics for different spray half cone angles. The simulation is
performed by using Computational Fluid Dynamic (CFD). The fuels that are used for the
simulation are Jet-A, Jatropha Bio-synthetic Paraffinic Kerosene (JSPK), and Camelina
Bio-synthetic Paraffinic Kerosene (CSPK). Additionally, the mixture of 50% JSPK with
50% Jet-A (50JSPK/50Jet-A) and the mixture of 50% CSPK with 50% Jet-A
(50CSPK/50Jet-A) are used to examine the effects of blend fuel. Every fuel is simulated at
30°, 40° and 50° of injection spray half cone angle. The velocity of the fuel injection spray
is considered in X and Y direction. The results obtained is compared in terms of the
temperature profile, spray penetration and injection discrete particle model evaporation.
From the simulation, it is found that as the spray half cone angle increases, the distance of
the maximum temperature increases, the final temperature increase, the time taken for
droplet to evaporate increases and discrete phase model evaporation decreases. At 40° and
50° spray half cone angle, Jet-A has the shortest time taken to completely evaporate and
highest DPM evaporation which is then followed by 50JSPK/50Jet-A, 50CSPK/50Jet-A,
JSPK and CSPK. Furthermore, Jet-A has the shortest distance to completely evaporate and
it is followed by JSPK, 50CSPK/50Jet-A, 50JSPK/50Jet-A and CSPK.