Improvements in aircraft propulsion units having a ducted airscrew or fan and jet propulsion units including an axial flow compressor

摘要

661,861. Jet propulsion plant; axial flow compressors. SOC. RATEAU, and ANXIONNAZ, R. Oct. 15, 1947. [Nov. 8, 1946] No. 27656/47. Drawings to Specification. Classes 110(i) and 110(iii). The ducted airscrew or fan of an aircraft propulsion unit or the axial compressor of a jet propulsion unit has stationary blades arranged downstream thereof to provide stream straightening channels having a decreasing cross section adapted to keep constant or to increase the absolute velocity of the air. Stationary blades are also provided on the inlet side to angularly shift the absolute air velocity in the direction of rotation in order to adapt the relative air velocity to a satisfactory Mach number and to keep the air velocity substantially constant. Specification 650,661 is referred to.