Engine 3E Phase II. Grundlagenuntersuchungen zur Entwicklung eines Kerntriebwerks fuer einen effizienten und umweltfreundlichen Antrieb. T. 2: Gestufte Brennkammer Technischer Bericht

Within the research program 'Grundlagenuntersuchungen zur Entwicklung eines Kerntriebwerks fuer einen effizienten und umweltfreundlichen Antrieb, Teil II: Gestufte Brennkammer' from 1.10.1999 to 30.9.2003 the fundamentals of emissions reduced lean module combustors were developed at Rolls-Royce Deutschland. Driven by future NO_x emissions requirements and the corresponding emissions goals a NO_x reduction down to 49% CAEPII C1 for the ICAO take-off - landing cycle was achieved for the current E3EII engine cycle. The required cooling air reduction was obtained by application of optimised impingement effusion cooled tiles for the combustor liner cooling. The focus of the research and development work was given to the lean module burner which initially was conceived for an application within an axially staged combustor. During the course of the project due to cost and weight reasons the single annular combustor concept was favoured. Therefore the demands on the main burner in respect to operability were tightened which lead to the need for an integrated pilot zone within the lean module burner. An internally staged lean module burner was designed in collaboration with a fuel spray nozzle manufacturer. Within a fully annular combustor rig a prototype burner was successfully tested under simulated engine conditions. The emissions performance as well as the thermal load onto the combustor walls were investigated. Although the goals in respect to NO_x emissions module cost and weight were achieved some deficiencies remain in respect to ignition capability and lean blow out. (orig.)SIGLEAvailable from TIB Hannover: F04B276 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Wirtschaft und Arbeit, Bonn (Germany)DEGerman