Rapid Liquid Fuel Mixing for Lean-Burning Combustors: Low-Power Performance

May Y. Leong, Craig S. Smugeresky, Vincent G. McDonell, G. Scott Samuelsen
2000 Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations   unpublished
Designers of advanced gas turbine combustors are considering lean direct injection strategies to achieve low NO x emission levels. In the present study, the performance of a multipoint radial airblast fuel injector Lean Burn injector (LBI) is explored for various conditions that target low-power gas turbine engine operation. Reacting tests were conducted in a model can combustor at 4 and 6.6 atm, and at a dome air preheat temperature of 533 K, using Jet-A as the liquid fuel. Emissions
more » ... ts were made at equivalence ratios between 0.37 and 0.65. The pressure drop across the airblast injector holes was maintained at 3 and 7-8 percent. The results indicate that the LBI performance for the conditions considered is not sufficiently predicted by existing emissions correlations. In addition, NO x performance is impacted by atomizing air flows, suggesting that droplet size is critical even at the expense of penetration to the wall opposite the injector. The results provide a baseline from which to optimize the performance of the LBI for lowpower operation. Transactions of the ASME Downloaded From: http://dynamicsystems.asmedigitalcollection.asme.org/ on 02/05/2015 Terms of Use: http://asme.org/terms Fig. 9 Upper spray penetration predicted by modified correlation of Leong et al. †15 ‡ Journal of Engineering for Gas Turbines and Power JULY 2001, Vol. 123 Õ 579 Downloaded From: http://dynamicsystems.asmedigitalcollection.asme.org/ on 02/05/2015 Terms of Use: http://asme.org/terms
doi:10.1115/2000-gt-0116 fatcat:xfiwor32gvbo5ix3bb5jxshel4