Normal component of induced velocity in the vicinity of a lifting rotor with a nonuniform disk loading /

Part 2 develops certain symmetry relations for induced velocities in the plane of a uniformly loaded rotor and also develops relations between the radial load distribution of the rotor and the radial variation of induced velocities in the wake.A comparison of the results of this paper with those for a uniform disk loading shows that nonuniform disk loading has a powerful effect on the induced velocity distribution and that it must be taken into account in estimating the effect of the rotor on most components of an aircraft.Part 1 preseents a method for computing, from available calculations for uniform disk loading, the effect of nonuniform circularly symmetrical disk loading on the normal component of induced velocity in the vicinity of a lifting rotor. Charts of the normal component of induced velocity are given for the longitudinal plane of symmetry and for the major axes of rotors with two different, nonuniform circularly symmetrical disk load distributions. It is shown that the normal component of induced velocity must be zero at the center of any practical rotor.NACA TN No. 3690.Includes bibliographical references.Part 2 develops certain symmetry relations for induced velocities in the plane of a uniformly loaded rotor and also develops relations between the radial load distribution of the rotor and the radial variation of induced velocities in the wake.A comparison of the results of this paper with those for a uniform disk loading shows that nonuniform disk loading has a powerful effect on the induced velocity distribution and that it must be taken into account in estimating the effect of the rotor on most components of an aircraft.Part 1 preseents a method for computing, from available calculations for uniform disk loading, the effect of nonuniform circularly symmetrical disk loading on the normal component of induced velocity in the vicinity of a lifting rotor. Charts of the normal component of induced velocity are given for the longitudinal plane of symmetry and for the major axes of rotors with two different, nonuniform circularly symmetrical disk load distributions. It is shown that the normal component of induced velocity must be zero at the center of any practical rotor.Mode of access: Internet