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Design and Development of a Turbulent Partially-Premixed Jet Burner

Hassanpour, Yousef | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55766 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Salehi, Mohammad Mahdi; Mardani, Amir
  7. Abstract:
  8. The burners studied in the combustion principles have different types due to the configuration of different types of flames, each of them studies a specific phenomenon of combustion, so researchers need to design burners with the ability to: create different types of combustion flow regimes, changing in mixing rate and performance at critical points are felt more and more. This document describes the process of designing and manufacturing a turbulent jet burner with variable mixing ratio and the ability to create a diverse range of flow regimes and different flame configurations. Mixing rate is the most important characteristic in the stability of premixed flames, so the distinctive feature of this burner is ability to change the percentage of premixed fuel and air flows of output flame. The mechanism of changing the pre-mixing ratio of designed burner is by sliding the fuel channel along the axis of the passing flow (air / fuel). designing plan of the burner is fully modular to include most jet burner configurations, so that the present burner produces at least six types of flame configurations, including non-premixed, premixed, partially-premixed, bluff body flame, annular jet flame and piloted jet flame. velocity of fuel and air flow in the burner at piloted jet configuration is very high and diameter of fuel and air and the pilot is very small, so many limitations in design process are obvious. For optical data collection, the flame is captured by narrow-band optical filters, so that the results of this group of images will be the basis for validation of the results of numerical researches, and blow of velocity as a characteristic of flame stability at various rates. Flow rates have been measured using multiple flowmeters, thus it was observed that the rate of mixing changes report an optimal operational point with the highest flame stability. effects of changing the equivalence ratio on the flame stability are other characteristics of present study
  9. Keywords:
  10. Premixed Flame ; Partially Premixed Flame ; Jetting Condition ; Flow Regime ; Jet Burner

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