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Title: A theoretical study of liquid droplet combustion
Researcher: Shah Shahood Alam
Guide(s): Nizami, A A
Keywords: Mechanical Engineering
liquid droplet combustion
Fuel Droplet
Upload Date: 19-Sep-2013
University: Aligarh Muslim University
Completed Date: 2011
Abstract: An unsteady, spherically symmetric, single component, diffusion controlled gas phase droplet combustion model is developed assuming infinite kinetics and no radiation effects. Finite difference technique was used to solve time dependent equations of energy and species. Effects of ambient temperature, pressure and composition on important combustion parameters like adiabatic flame temperature, droplet mass burning rate, burning constant, droplet lifetime, flame diameter, flame to droplet diameter ratio (flame standoff ratio), flame standoff distance and square of droplet diameter are obtained. Results indicate that the flame first moves away from the droplet surface and then towards it. Flame to droplet diameter ratio increases throughout the droplet burning period, its value being much smaller than that of the quasi-steady case. Effects of forced convection and droplet heating are observed for a 1300 m and#956; n-octane combusting droplet with respect to mass burning rate and droplet lifetime. Extinction diameter for a 3000 m and#956; n-heptane droplet burning in oxygen-helium environment is determined. Effects of variation of droplet size and fuels (alkane, alcohol, biodiesel) on important combustion parameters are obtained. It is observed that dimensionless flame diameter 0 / F D is influenced primarily by the fuel boiling point. Emission data for a spherically symmetric droplet burning in standard conditions are obtained with respect to important species using the present gas phase code in conjunction with Olikara and Borman programme. Effects of ambient temperature and fuels (including pure and multicomponent fuels and their blends) on CO, NO, CO2, and H2O concentrations are determined from the point of view of getting a qualitative trend Supercritical droplet vaporisation models for n-heptane-N2 and LOX-H2 systems are developed with considerations of high pressure liquid-vapour equilibrium, real gas effects newlineand absorption of ambient gas in liquid layer at the droplet surface.
Pagination: xv, 197p.
Appears in Departments:Department of Mechanical Engineering

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01_title.pdfAttached File107.95 kBAdobe PDFView/Open
02_certificate.pdf856.03 kBAdobe PDFView/Open
03-abstract.pdf124.7 kBAdobe PDFView/Open
04_acknowledgement.pdf496.85 kBAdobe PDFView/Open
05_content.pdf104.8 kBAdobe PDFView/Open
06_list of figures.pdf136.34 kBAdobe PDFView/Open
07_list of tables.pdf129.51 kBAdobe PDFView/Open
08_list of symbols.pdf121.8 kBAdobe PDFView/Open
09_chapter 1.pdf353.82 kBAdobe PDFView/Open
10_chapter 2.pdf304.14 kBAdobe PDFView/Open
11_chapter 3.pdf257.23 kBAdobe PDFView/Open
12_chapter 4.pdf148.02 kBAdobe PDFView/Open
13_chapter 5.pdf687.6 kBAdobe PDFView/Open
14_chapter 6.pdf127.72 kBAdobe PDFView/Open
15_references.pdf155.43 kBAdobe PDFView/Open
16_appendix.pdf186.15 kBAdobe PDFView/Open

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