Motor-integrated fluid machine and vertical take-off and landing aircraft

A motor-integrated fluid machine in which one or more motors are integrally provided, the motor-integrated fluid machine comprising:

• a shaft part at a center of a rotational axis and serving as a first portion of a supporting system;
• a rotation part to be rotated about the shaft part and serving as a rotating system;
• an outer peripheral part on an outer periphery of the shaft part and serving as a second portion of the supporting system;
• and
• a motor configured to rotate the rotation part,
• wherein the rotation part is rotatably supported by at least the shaft part and is rotated by the motor, and the rotation part includes a plurality of blades arranged in a circumferential direction of the rotational axis and a rotation support member connected to one side of each of the plurality of blades in a radial direction of the rotational axis and supporting the plurality of blades,
• wherein the outer peripheral part is a duct formed in an annular shape and configured to generate a thrust due to the rotation of the rotation part,
• wherein the duct includes an upstream portion on an inflow side into which fluid flows, a downstream portion on an outflow side out of which the fluid flows, and a midstream portion between the upstream portion and the downstream portion,
• wherein at least an inner peripheral surface of the upstream portion has a predetermined radius of curvature in a cross section taken along a plane orthogonal to the circumferential direction of the rotational axis,
• wherein an inner peripheral surface of the midstream portion has a linear portion in the cross section,
• wherein an inner peripheral surface of the downstream portion is tapered so as to spread radially from the inflow side toward a downstream side
• wherein an inflow side surface of the rotation part is perpendicular to the axial direction of the rotational axis and forms a plane of rotation, and a relationship between a diameter D of the plane of rotation and the predetermined radius of curvature r is 0.03D≤r≤0.09D,
• wherein the inner peripheral surface of the downstream portion is linear in a cross-sectional view viewed from a direction perpendicular to the axial direction of the rotational axis,
• wherein the inner peripheral surface of the downstream portion is tapered to form an angle between the inner peripheral surface of the downstream portion and a direction of the inner peripheral surface of the midstream portion in a range of 30° or less,
• wherein the motor-integrated fluid machine further comprises an aerodynamic device on an inner peripheral surface of the duct on an outflow side of the rotation part, the aerodynamic device being configured to suppress separation of fluid flowing along the inner peripheral surface,
• wherein the aerodynamic device is on a boundary side of at least the midstream portion at a boundary between the midstream portion and the downstream portion,
• wherein the motor-integrated fluid machine further comprises a control unit configured to control the aerodynamic device, and
• wherein the control unit is configured to operate the aerodynamic device until the rotation part reaches a predetermined rotation speed.