G.E. Andrews, M.M. Abdul Aziz, U.S. Abdul Hussain, N.A. Al Dabbagh, N.A. Ahmad, A.F. Ali Al Shaikhly, H.S. Alkabie, M. Kowkabi

New results for premixed combustion of propane / air mixtures with different flame stabilisers are presented. These, together with a range of data from the literature show that premixed combustion does not necessarily have ultra low NO emissions, often has a combustion efficiency problem and always has a stability problem. Ultra low No emissions generally cannot be achieved due to stability and efficiency problems. A range of designs are presented that use direct fuel injection at the stabiliser plane into the base of round jet or swirling jet shear layers. These are shown to have a wider stability than premixed systems and the ability to achieve ultra low NOx emissions without an efficiency problem. NO emission index results below 1 are demonstrated for propane at 600K and l bar pressure. Finally, one of the designs, a radial swirler, is shown to have low NOx emissions which can be reduced further by changing the fuel placement. NO emissions as low as 1 and 7 ppm NOx (0.1 and 0.7 Ef), at 15% oxygen and 1 bar pressure are demonstrated for propane and kerosene respectively, without an efficiency problem.

Eurpean Propulsion Forum, 1990, Köln

Conference Paper

englisch

21,0 x 29,7 cm, 14 Seiten

DGLR-Bericht, 1990, 1990-01, Eurpean Propulsion Forum: Future Civil Engines and the Protection of the Atmosphere - Proceedings; S.161-174; 1990; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

Bestellbar

1990