发明授权
- 专利标题: Reduced noise fan stationary blade
- 专利标题(中): 减噪风扇固定叶片
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申请号: US10220061申请日: 2002-08-28
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公开(公告)号: US06726445B2公开(公告)日: 2004-04-27
- 发明人: Naoki Tsuchiya , Ryou Umeyama , Dai Kato
- 申请人: Naoki Tsuchiya , Ryou Umeyama , Dai Kato
- 优先权: JP2001-154865 20010524
- 主分类号: F01D904
- IPC分类号: F01D904
摘要:
A low noise fan stationary blade, wherein a negative lean angle &thgr;L in the reverse direction of a rotating direction is provided near a hub and a positive lean angle &thgr;L in the rotating direction is provided on the other tip side, the negative lean angle &thgr;L is −10°±3° in a high loss area near the hub and the positive lean angle &thgr;L is 30°±3° on the tip side, a positive sweep angle &thgr;s is provided, and the positive sweep angle &thgr;s is 20°±3° on the hub side and 20°±3° also on the tip side, whereby a total pressure loss on both hub and tip sides can be reduced, noise can be reduced on both hub and tip sides, and thus noise can be reduced without lowering an aerodynamic performance.
公开/授权文献
- US20030215325A1 Reduced noise fan stationary blade 公开/授权日:2003-11-20