Abstract
This study has been carried out in order to investigate the applicability of a pressurized and fuel-rich burner as a first stage combustor for a newly proposed chemical gas turbine system. The flammability limits, exhaust gas composition and the NOx emission characteristics under the pressurized conditions of 1.1 - 4.1 MPa have been investigated in a model combustor. This paper focuses on the influence of pressure and F/A equivalence ratio on flame structures of pressurized combustion with methane and air to obtain detailed data for designing of fuel-rich combustor for gas turbine application. The flame under fuel-rich condition and pressure of 1 MPa showed underventilated structure like other atmospheric fuel-rich flames while the flame under pressure over 1.5 MPa had shapes as fuel-lean flame. The flame becomes longer as the pressure was increased under the fuel-lean condition, while under fuel-rich condition the influence of pressure on flame length was smaller in comparison with the flame under fuel-lean conditions. These results give an opportunity for developing smaller combustor under fuel-rich and pressurized condition compared to fuel-lean one. Numerical simulation has been done for defining the temperature profile in the model combustor using the k-ε turbulence model and three-step reaction model. The comparison between theoretical results and experimental data showed fair agreements.
Original language | English |
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Pages (from-to) | 313-320 |
Number of pages | 8 |
Journal | American Society of Mechanical Engineers, Fuels and Combustion Technologies Division (Publication) FACT |
Volume | 22 |
Publication status | Published - Dec 1 1998 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Engineering(all)