狭い空間上で地面効果を受けるホバリングロータの空力性能に対する胴体の影響

摘要

This paper shows the effects of fuselage on the aerodynamic performance of a helicopter rotor hovering above a confinedarea because the rotor wake remarkably affects on the rotor aerodynamic performance at this flight environment. Thehovering test of the rotor with fuselage above the confined area was carried out at the disk loading of a constant grossweight plus the vertical fuselage drag. The steady torque coefficient of rotor with fuselage increases than that without it atrotor height of near out-of-ground effect, and its effects are small at rotor height of less than 1.0.