Rotary machine

A rotary machine, comprising:

• at least one stationary member;
• at least one rotational member configured to be relatively rotatable with respect to the at least one stationary member;
• a seal device capable of restricting a flow of a fluid in a clearance between the at least one stationary member and the at least one rotational member;
• and
• a swirl-component imparting device disposed upstream of the seal device in a flow direction of the fluid and being capable of imparting a swirl component to the fluid,
• wherein the clearance between the at least one stationary member and the at least one rotational member includes a cavity having an opening into a main flow passage being capable of letting the fluid having the swirl component imparted by the swirl-component imparting device flow through, and
• wherein the seal device comprises:
• a pressure loss element mounted to the at least one stationary member and being disposed downstream of the cavity in the flow direction of the fluid;
• a first non-contact type seal protruding from the at least one rotational member toward the pressure loss element and facing the pressure loss element via a first gap;
• a contact type seal protruding from the at least one stationary member toward the at least one rotational member and being disposed downstream of the pressure loss element and the first non-contact type seal in the flow direction of the fluid;
• and
• at least one swirl-component suppressing flow passage disposed in the at least one stationary member and being capable of supplying the cavity with a fluid for reducing the swirl component of the fluid.