Standard

ISO 5136:1990

Withdrawn

Note: This standard has a new edition: ISO 5136:2003

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Abstract

Gives a method for testing ducted fans. Applies to fans which emit steady, broadband, narrow-band and discrete-frequency sound. Applies to air temperatures between -50 °C and +70 °C. The test duct diameter range is from 0,15 m to 2 m. The maximum flow velocity is 30 m/s and the maximum swirl angle is 15°. An example of a method for determining the angle of swirl is given in annex F. The one-third octave band centre frequency range is from 50 Hz to 10 000 Hz.

Document information

  • Standard from ISO
  • Published:
  • Withdrawn:
  • Expires:
  • Edition: 1
  • Version: 1
  • Document type: IS
  • ICS 91.120.20
  • ISO TC ISO/TC 43/SC 1

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