To provide a low-noise airfoil for an open rotor.SOLUTION: An airfoil section of a blade (32) for an open rotor includes a pressure side (38) and a suction side (40). The pressure side (38) and the suction side (40) intersect at a leading edge (42) and a trailing edge (44). A chord of the airfoil section is defined as a straight-line distance between the leading edge (42) and the trailing edge (44). The airfoil section has a meanline (48) defined midway between the pressure side (38) and the suction side (40). The meanline (48) is shaped to include a predetermined total turning. The meanline (48) is shaped such that less than 15% of the total turning occurs in 40% to 75% of the chord. The meanline (48) is shaped such that more than 35% of the total turning occurs in the aft 25% of the chord.SELECTED DRAWING: Figure 5
【課題】オープンロータ用の低騒音翼形部を提供する。【解決手段】オープンロータ用ブレード(32)の翼形部は、正圧側面(38)および負圧側面(40)を含み、正圧側面(38)および負圧側面(40)は、前縁(42)および後縁(44)で交差し、翼形部の翼弦は、前縁(42)と後縁(44)との間の直線距離として定義され、翼形部は、正圧側面(38)と負圧側面(40)との中間に規定された中間線(48)を有し、中間線(48)は、中間線が所定の総回転を含むように成形され、中間線(48)は、総回転の15%未満の部分が翼弦の40%から75%までで発生するように成形され、中間線(48)は、総回転の35%より大きい部分が翼弦の後方25%で生じるように成形される。【選択図】図5
LOW-NOISE AIRFOIL FOR OPEN ROTOR
オープンロータ用の低騒音翼形部
2019-03-07
Patent
Electronic Resource
Japanese
IPC: | B64C AEROPLANES , Flugzeuge |