考虑污染物排放的开式转子发动机总体性能建模及分析研究

The open rotor engine has the characteristics of high propulsion efficiency of turboprop engine and high flight speed of turbofan engine，and is one of the ideal power devices for future civil single-aisle passenger aircraft. In order to grasp the performance variation of the open rotor engine，and to clarify the advantages of the open rotor engine compared with the high bypass ratio turbofan engine in fuel saving and pollutant emissions reducing，this paper established a contra-rotating propeller model based on the propeller similarity theory and momentum theory，which considers the interaction between the front and rear propeller. Matching with the dual-shaft gas generator，a three-shaft gear drive open rotor engine model was established. An engine pollutant emissions calculation model was established. The performance of the open rotor engine and high bypass ratio turbofan engine were compared finally at the same technical level. The results show that the error between the established contra-rotating propeller model and experimental results is small，and the maximum error does not exceed 3%. When the flight Mach number increases，the contra-rotating propeller power coefficient increases，the thrust coefficient decreases，and the fuel consumption rate increases. When the flight altitude increases，the contra-rotating propeller power coefficient and thrust coefficient both increase，and the fuel consumption rate tends to decrease. Compared with the high bypass ratio turbofan engine of the same technical level，the fuel consumption of the open rotor engine under typical operating conditions is greatly reduced by more than 9%. In the landing-takeoff cycle，the three pollutant emission indices of UHC，CO and NO_x of the open rotor engine are reduced by more than 10% compared with the high bypass ratio turbofan engine，indicating that the open rotor engine can effectively reduce the emission of aviation pollutants.