Low NOx Annular Type Combustor for 20 kW Gas Turbine Engine

• Published in: Journal of the Institution of Engineers (India) Series C Vol. 101; no. 6; pp. 1035 - 1042
• Main Authors: Solanki, H. K., Kulshreshtha, D. B., Chaudhari, N. R.
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 01.12.2020; Springer Nature B.V
• Subjects: Aerospace Technology and Astronautics; Combustion chambers; Design parameters; Engineering; Equivalence ratio; Gas turbine engines; Industrial and Production Engineering; Mechanical Engineering; Nitrogen oxides; Original Contribution; Pressure drop; Temperature profiles; Hydrogen fuelled; technology; Mobile power generation; Low NO; RQL combustor
• ISSN: 2250-0545; 2250-0553
• DOI: 10.1007/s40032-020-00610-6

The present combustor addresses NO x reduction for mobile power application which can be easily carried to different locations. The Annular type combustor is developed for 20KW thermal capacity gas turbine engine, using hydrogen as fuel. For low NO x emission, the conventional annular liner is redesigned to incorporate Rich Burn, Quick Mix, and Lean Burn Combustor (RQL). The combustor is tested in high pressure test rig at design and off-design conditions. The performance parameters under consideration are temperature profiles, NO x emissions, pressure drop and pattern factor. These parameters are studied with respect to rich zone and lean zone equivalence ratio. The rich zone equivalence ratio is varied from 1.1 to 1.81, while the lean zone equivalence ratio is varied from 0.32 to 0.59. The experimental results suggest that rich zone equivalence is the main factor in controlling NO x emissions, while pattern factor (radial and circumferential) is dependent on lean zone equivalence ratio.