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Experimental and Numerical Study of Gas Turbine Model Combustor

Rezapour-Rastaghi, Hamed | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50857 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Mardani, Amir
  7. Abstract:
  8. High Swirl Combustors can provide stable flames in wide range of operating conditions. Double swirl combustors, as one of the newest designs in this field, have particular effects on improving the efficiency of combustion chambers in terms of flame stability, mixing process quality and reducing combustion pollutants. In this study, a double swirl gas turbine combustor, SGTMC, which is redesigned version of a German combustor (GTMC), has been investigated. According to experimental section of this study, lean stability limits, UHCs, CO and NOx has been measured and analyzed. Results show that this burner can provide a stable flame even in very low equivalence ratios. Also in some specific operating conditions, it can provide low NOx-CO stable flames according to lean stability limit diagram. These particular conditions are specified by a region which is located in 25 to 50 percent of lean stability limit value above the lean stability curve in high flow rate region. Also some flame pictures in different operating conditions have been provided to compare flame shape and reaction intensity. In the following, effects of inlet air preheating on flame stability limit diagram and exhaust pollutants has been investigated. Numerical simulations reveal strong recirculation structures of flow field. Also effects of inlet flow rate have been investigated
  9. Keywords:
  10. Gas Turbines ; Combustion Chamber ; Flame Stability Criteria ; Nitrogen Oxides ; Double Swirl Burner

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