Open rotor 엔진

Portion of fuel cost in an airplane’s operating cost is continuously increasing due to the current high price of oil. The necessity of new engine which can reduce fuel burn or enhance engine efficiency of existing engines is seeking, and lots of the research works have been going on to resolve this issue. One of the possible solutions is open rotor engine which maximizes the benefits of turbofan engine in high speed operation and propeller efficiency in low speed operation. The concept of open rotor engine is not introduced recently, it might be initiated from the advanced turboprop program(ATP) in 1970’s. In this paper summarized by-product of ATP such as SRP(single rotating Propeller) and CRP(Counter Rotating Propeller) which was backbone of open rotor engine. The current research activities performed by major engine companies such as GE and Rolls-Royce to materialize the concept are introduced, and the technical challenges of open rotor engine and current research works to resolve these issues are also discussed.