Injection of lean mixtures into hot burned gas for maintaining lownox emissions over an extended range of fuel-air ratios in prevaporized combustion

• Autorzy: Kawakami, T. , Aida, N. , Nishijima, T. , Yamada, H. , Hayashi, S.
• Języki publikacji: EN

Abstrakty

EN

“Flameless combustion” of lean to ultra lean mixtures, supported by hightemperature burned gas, can resolve the dilemma between complete combustion versus ultralow NOx emissions in gas turbine combustors. The characteristic of NOx emissions and combustion in “leanlean” twostage combustion was investigated for premixedprevaporized keroseneair mixtures using a coaxial flow configuration. A circular jet of secondary keroseneair mixtures of lean to ultralean compositions were injected into the primary hot burned gas prepared by combustion of lean mixtures on an annular perforated flame holder The progress of reaction and NOx formation in the combustion tube were measured for nonswirled and swirled secondary jets. The conditions required for complete combustion of the secondary mixtures were defined for various ratios of secondary to primary air flow rates.

• Czasopismo: Journal of KONES
• Rocznik: 2003
• Tom: Vol. 10, No. 3-4
• Strony: 137-148
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Kawakami, T.

• Faculty of Engineering Hosei University

autor

Aida, N.

• Faculty of Engineering Hosei University

autor

Nishijima, T.

• Faculty of Engineering Hosei University

autor

Yamada, H.

• Aeropropulsion Research Center, National Aerospace Laboratory, Jindaijihigashi, Chofu, Tokyo tel. [phone],fax [phone] ,

autor

Hayashi, S.

• Aeropropulsion Research Center, National Aerospace Laboratory, Jindaijihigashi, Chofu, Tokyo tel. [phone],fax [phone] ,

Bibliografia

• [1] Flayashi S., Yamada H. and Makida M.: Shot-Flam/ Quick-quench: A Unique Ultraslow emissions Combustion Concept for Gas Turbine Combustors, Proc. Combustion Institute, 28: pp. 1273-1280 (2000).
• [2] Yamada H., Hayashi S. and Makida M.: Application of Short-Flame/Quick-Quench Combustion Concept to Ultra-Low NOx Gas Turbine Combustors, Proc. IGTC-Kobe: pp.741-746 (1999).
• [3] Kajita S., Ohga S., Ogata M., Itaka S., Kitajima J., Kimura T. and Okuto A.: an Advanced Development of a Second-Generation Dry, Low-NOx Combustor for 1.5 MW Gas Turbine, ASME paper 96-GT-49.
• [4] Hayashi S. and Yamada H.: NOx Emissions in Combustion of Lean Premixed Mixtures Injected into Hot Burned Gas, Proc. Combustion Institute, 28: pp.2443-2449 (2000).