Rolls-Royce Advancing Engine Tech with E3E Core
Rolls-Royce today announced that it has successfully run the latest E3E (efficiency, environment, economy) core engine as part of its two-shaft research program, which is intended to develop future powerplants for business jets and single-aisle airliners. The latest core build produced “excellent results” during 40 hours of run trials at Stuttgart University’s altitude test facility, exceeding flight-envelope requirements, the company said. According to Rolls-Royce, E3E is developing “leading-edge technologies” that increase engine temperature, pressure ratio and component efficiencies, combined with a 25-percent-plus increase in thrust-to-weight ratios. Other goals include a 15-percent reduction in fuel burn and CO2 emissions, as well as 60 percent fewer NOx emissions. Specific technologies used on the E3E core include a two-stage shroudless high-pressure (HP) turbine, tip clearance control system with advanced ceramic abradable linings, lean-burn combustion system, blisked HP compressor, air system for bearing load management and improved cooling using carbon oil seal and brush-seal air sealing technologies. Notably, the nine-stage blisked HP compressor has so far demonstrated a 22:1 pressure ratio. More cores will be tested over the next two years to include 1,200 cycles of max-takeoff-power endurance testing.