Airflow control apparatus, airflow control system, and airflow control method

An airflow control system, comprising:

• an airflow control apparatus including
• a first frame that is located about a center of rotation and includes a through-hole,
• a second frame that is located, about the center of rotation, on an outer circumference side relative to the first frame, and
• a rectifying plate that is flexible, has one end fixed to the center of rotation and another end fixed to the second frame, passes through the through-hole, and changes an amount of deflection of a portion between the through-hole and the center of rotation according to a change in a length of the portion by relative rotation of the first frame and the second frame about the center of rotation;
• and
• a controller that controls the rectifying plate to define relative rotation angles of the first frame and the second frame about the center of rotation.

An airflow control method, comprising:

• controlling a rectifying plate of an airflow control apparatus, the airflow control apparatus including
• a first frame that is located about a center of rotation and includes a through-hole,
• a second frame that is located, about the center of rotation, on an outer circumference side relative to the first frame, and
• the rectifying plate that is flexible, has one end fixed to the center of rotation and another end fixed to the second frame, passes through the through-hole, and changes an amount of deflection of a portion between the through-hole and the center of rotation according to a change in a length of the portion by relative rotation of the first frame and the second frame about the center of rotation;
• and
• defining relative rotation angles of the first frame and the second frame about the center of rotation.