Loading...

Experimental Study of Confined Kerosene MILD Spray Combustion

Lotfollah Oghli, Mahdi | 2023

0 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57396 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Mardani, Amir
  7. Abstract:
  8. In this study, the experimental study of kerosene mild spray combustion with the presence of the chamber has been investigated. The test rig that has been studied and improved is Sharif University of Technology's MILD Combustion Test Rig on a laboratory scale, which provides the possibility of studying spray combustion with preheating and high dilution. This test rig, while solving the problems of similar test stands, has the possibility of operating with liquid kerosene fuel, which is widely used in various industries. This test rig is axially symmetrical and provides the possibility of providing co-flow air with the desired temperature, swirl number and dilution rate for a liquid fuel spray burner. Also, in this test stand, it is possible to change the type of injector as well as the fuel injection pressure. In this research, while improving the MILD combustion test rig of Sharif University of Technology, by designing and building a chamber capable of imaging the flame as well as measuring the temperature field, the MILD combustion regime is investigated in which the flame has a blue burning with very low luminosity. Also, it has a uniform temperature field and a lower maximum temperature compared to normal combustion, and under condition it is close to the flameless state. the required temperature for preheat was reduced by 8 % and also a stable flame with the percentage of oxygen dilution was achieved about 12 % which compared with the previous results [ 1 ] and [ 2 ] , 3 - 5% more dilution. The intended chamber has the possibility of changing the confine ratio in which the flame is enclosed, and the geometric characteristics of the flame with high swirl as well as preheating and high dilution are investigated. In this research, an attempt is made to image the flame with band-pass filters, image processing is done, and the geometrical characteristics of the flame and the chemiluminescence of combustion species are investigated, and a database is collected that is willing to study the combustion regime experimentally, along with the chamber in the research, at future studies will be helpful. Finally, the study of the change of some controllable parameters such as air flow rate, fuel flow rate and Confine number has been discussed
  9. Keywords:
  10. Moderate or Intense Low Axygen Dilution (MILD) ; Spray Combustion ; Preheating ; Dilution ; Confinement ; Enclosed Flame ; Kerosene

 Digital Object List

 Bookmark

No TOC