Flow Style Investigation and Noise Reduction of a Cross-Flow Fan with Varied Rotor-Skew-Angle Rotor

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概要

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• The purpose of this study was investigating the noise emission, flow-style, fan's performance regarding to cross-fan with three different rotor-skew angle (RSA) rotors. The special flow visualization setups for both vertical and parallel investigation of smoke slice were used to overcome the blind sight of a Laser-Doppler or a particle-tracking velocimeter, and the three-dimensional flow differences were confirmed with streamline images. The experimental results indicated that RSA-5, which is a rotor with a nearly a pitch skew within blade's two end shrouds, has a lower sound emission and little pressure drops relative to that of no skew angle case, RSA-0. RSA-10, two pitches twisting case, also has a better acoustics quietness than that of RSA-0, but it excited undesired noise in a high frequency components around 2-4kHz. In this work, for a compromise between flow and acoustics performances, RSA-5 shows the most suitable design for cross-flow fan rotor.

• 2006-08-15

著者

• Li Tung-chen

  Gam Sound Lab. Development Center Sunonwealth Electric Machine Industry Co. Ltd.

• Wang Kuang-hsieng

  Acoustic Lab.:manufacturing Development Office Benq Corporation

• Tu Tsung-hsien

  Institute Of Mechanical And Electrical Engineering National Taipei University Of Technology

• TSAI Go-Long

  Department of Vehicle Engineering, National Taipei University of Technology

• Tsai Go-long

  Department Of Vehicle Engineering National Taipei University Of Technology

関連論文

• Flow Style Investigation and Noise Reduction of a Cross-Flow Fan with Varied Rotor-Skew-Angle Rotor

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