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CROR
Usado para
counter-rotating open rotor
Fonte1
INTERNATIONAL CIVIL AVIATION ORGANIZATION. Report by the second CAEP noise technology independent expert panel: novel aircraft-noise technology review and medium- and long-term noise reduction goals: report. Montreal, 2014. (Doc. 10017).
Contexto
The counter-rotating open rotor (CROR) allows for even higher propulsive efficiencies by removing the duct and using counter-rotating blades to recover the swirl as the air passes through the engine. The tip speeds of the blades are lower than the fan speeds in turbofans, so the diameter of the engine needs to be larger to provide sufficient thrust. This concept was first investigated in the 1980‘s by General Electric and was called the Unducted Fan (UDF).