INLET GUIDE VANE FLAP, FAN SECTION, AND CONTROL METHOD FOR INLET GUIDE VANE FLAP SYSTEM OF VARIED FORM

摘要

PROBLEM TO BE SOLVED: To provide an inlet guide vane flap, with improved operation performance and flatter margin for a partial speed range so as to prevent tuning error to a fan rotor in a specific actuation condition.

SOLUTION: The inlet guide vane (IGV) system 46 of varied form comprises the inlet guide vane flap 48 of varied form provided with a flexible part 64 so as to achieve axial speed Cx at the inlet of the fan rotor 30, and desired blade width direction distribution forαandβ. The flexible part 64 is formed of flexible material such as silicone rubber combined with internal reinforcing fibers or filaments. The form of the flap 48 is not symmetric, but twisted during actuation from the maximum opening position to the maximum closed position.

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