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Particle Shadow Velocimetry in Premixed Flames

Movaffagh, Sajjad | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54584 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Kebriaee, Azadeh
  7. Abstract:
  8. The velocity of the hot outflow gas in laminar premixed flame is one of the important properties of combustion, along with other properties such as temperature and flame components. In fact, laminar flame velocity has been employed in a multitude number of concepts ranging from engine design to achieving flame properties under turbulent conditions. In this research, a cylindrical Bunsen burner and appropriate TIO2 particles were used. Particles with diameters between 10-23 microns were used and the exit diameter of burner considered 14 mm. In this study, the equivalence ratio with a value between 0.9-1.2 are fed with LPG fuel to create a laminar premixed flame. As a result of the present study, it is observed that the hot outflow gas velocity of the flame changes between 29-34 cm / s. When the equivalence ratio increases from 1 to a further value, the flame velocity decreases from its maximum value slightly. Furthermore, particle shadow velocimetry can be considered as an easy to implement in different circumstances and apply to various flames. The employed method is more flexible than Particle Image Velocimetry (PIV) due to its principles and structures. The uncertainty value was calculated between 2.4 and 7.6 percent in laboratory conditions
  9. Keywords:
  10. Velocimetry ; Shadowgraphy Method ; Laminar Flamelet ; Premixed Flame ; Hot Gas ; Velocity Field

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