Centrifugal compression test device

A single stage centrifugal compression test device comprising:

• a rotary shaft extending in an axial direction;
• a bearing rotatably support the rotary shaft about an axis of the rotary shaft;
• a driving source that drives the rotary shaft around the axis;
• an impeller fixed to an outer circumferential surface of the rotary shaft and configured to pump a fluid flowing from a first side in an axial direction to an outside in a radial direction while rotating together with the rotary shaft;
• a flow path forming section comprising:
• a curved introduction flow path that:
• comprises an annular opening section that is provided at a front end of the curved introduction flow path and faces the first side of the impeller in the axial direction of the rotary shaft, and
• guides a fluid from the outside in the radial direction toward the inside in the radial direction by extending inward in the radial direction after curving from the annular opening section toward the inside of the flow path forming section,
• an inlet flow path connected to the introduction flow path and guides the fluid to the impeller from the first side in the axial direction, and
• an interstage inflow path extending from the outside toward the inside in the radial direction and connected to the inlet flow path at a second side of the introduction flow path in the axial direction;
• and
• an inlet space forming section having an introduction opening section through which a fluid is introduced from a part in the circumferential direction and outside in the radial direction at the first side of the introduction flow path in the axial direction, wherein the inlet space forming section forms an annular shape about the axis, and
• the inlet space forming section is connected to the annular opening section of the introduction flow path, and the annular opening section opens toward an inlet space of the inlet space forming section.