The Design Process for a Closed Combustion Chamber Flow Blurring Nozzle
DOI:
https://doi.org/10.13052/dgaej2156-3306.3411Keywords:
Flow blurring nozzle, Stable combustion, Meso scale com - bustion system, Nozzle designAbstract
This research outlines a process whereby a flow blurring nozzle is
optimized for use in a meso-scale combustion chamber. Flow blurring
is defined as the generation of small turbulence scales in a liquid from a
singular back-flow pattern of a gas. Flow blurring nozzles are beginning
to be adapted in many technical applications, from emission spectrom-
etry of heavy metals in biodiesel, vaporization of high viscosity fuels to
meso-scale combustion applications. This nozzle can vaporize liquids
at low flow rates efficiently and inexpensively. It uses an air stream to
break up the liquid but it operates in a novel flow blurring regime dif -
ferentiating it from a regular air blast atomizer. There are two issues with
using this nozzle for combustion applications. The first is that the air
used to vaporize the hydrocarbon in the flow blurring nozzle is insuf -
ficient to burn all the hydrocarbon and it is difficult to increase this air
supply. The second issue is that the vaporized mixture at the exit of the
flow blurring nozzle has a relatively high velocity. The mixture velocity
must be decelerated to enable stable combustion without blowoff. This
article outlines the design process for solving both these issues. In total,
five design iterations were implemented before a satisfactory final de -
sign was achieved.
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References
V. Sadasivuni and A.K. Agrawal, “A novel meso-scale combustion system for
operation with liquid fuels,” Proceedings of the Combustion Institute, vol. 32, pp. 3155-
, 2009.
D. Dunn-Rankin, M. Leal Elisangela and D.C. Walther, “Personal power systems,”
Progress in Energy and Combustion Science, vol. 31, pp. 422 - 465, 2005.
J. Moran and R. Pongvuthithum, “Combustion of Gasoline for Meso Scale Combustion
Applications,” Distributed Generation and Alternative Energy, vol. 31, no. 4, pp. 71 - 79,
September 2016.
P.D. Hede, P. Bach and A.D. Jensen, “Two-fluid spray atomisation and pneumatic
nozzles for fluidbed coating/agglomeration purposes: A review,” Chemical Engineering
Science, vol. 63, pp. 3821 - 3842, 2008.
I. Whelan, D. Timoney and W. Smith, “Advanced GDI Injector Control with Extended
Dynamic Range,” in SAE 2013 World Congress & Exhibition, Detroit, 2013.
D.C. Kyritsis, I. Guerrero-Arias, S. Roychoudhury and A. Gomez, “Mesoscale Power
Generation by a Catalytic Combustor using Electrosprayed Liquid Hydrocarbons,”
Proceedings of the Combustion Institute, vol. 29, pp. 965-972, 2002.
A. Ganan-Calvo, “Enhanced liquid atomization: From flow focussing to flow-
blurring,” vol. 86, no. 214101, 2005.
L. Jiang and A.K. Agrawal, “Combustion of straight glycerol with/without methane
using a fuel-flexible, low-emissions burner,” Fuel, vol. 136, pp. 177 - 184, 2014.
B.M. Simmons, H.V. Panchasara and A.K. Afrawal, “A comparison of air-blast
and flow blurring injectors using phase doppler particle analyzer technique,” in
Proceedings of ASME Turbo Expo, Orlando, 2009.
I. Kroo and P. Kunz, “Mesoscale flight and miniature rotorcraft development, in Fixed
and Flapping Wing Aerodynamics for Micro Air Vehicle Applications,” in of Progress
in Astronautics and Aeronautics, Salt Lake City, 2001.
A. Epstein and S.D. Senturia, “Macro Power from Micro Machinery,” Science, vol. 276,
no. 5316, pp. 1211-1212, 1997.
N.S. Kaisare and D.G. Vlachos, “A review on microcombustion: Fundamentals,
devices and applications,” Progress in Energy and Combustion Science, vol. 38, no. 3, pp.
-359, 2012.
G. Alessandro, J.B. Jonathan, R. Subir, C. Bruno and H. James, “From jet fuel to
electric power using a mesoscale, efficient Stirling cycle,” Proceedings of the Combustion
Institute, vol. 31, p. 3251-3259, 2007.
V. Shirsa and A. Gupta, “A review of progress in heat recirculating meso-scale
combustors,” Applied Energy, vol. 88, no. 12, p. 4294-4309, 2011.
