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특허 상세정보

Swept fan blade

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F04D-029/34   
미국특허분류(USC) 416/223A ; 416/DIG.2 ; 416/DIG.5
출원번호 US-0168968 (1998-10-09)
우선권정보 GB-0007316 (1996-04-09)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Oliff & Berridge, PLC
인용정보 피인용 횟수 : 64  인용 특허 : 8
초록

A swept fan blade design for the low pressure compressor rotor or fan rotor stage of a ducted fan gas turbine engine has a leading edge swept forward near the hub up to a first radial height, then rearward up to second radial height and finally is swept forward again up to the blade tip. The aerodynamic effect is to produce a mid-height bias to the airflow enabling the tip region to be given increased twist and to possess increased resistance to foreign object damage. The design also provides a rear radial blade stacking axis to help reduce internal stre...

대표
청구항

[ What is claimed is:] [1.] A fan stage of a ducted fan gas turbine engine, comprisinga fan casing having an inner duct wall which in a fan rotor region is convergent in the downstream direction; anda fan rotor including a multiplicity of swept fan blades spaced apart around a hub mounted concentrically with respect to the fan duct, each of said swept fan blades having a tip profile which in revolution is convergent so as to substantially correspond to the convergent duct wall, a leading edge of variable sweep angle which varies with increasing blade hei...

이 특허를 인용한 특허 피인용횟수: 64

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