Flow Diagnostics and the Acoustic Behavior of a Fan-and-Coil Assembly

Zeller, S.E.; Weaver, R.L.; Dutton, J.C.; Jacobi, A.M.; Balachandar, S.

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https://hdl.handle.net/2142/11912 Copy

Description

Title

Flow Diagnostics and the Acoustic Behavior of a Fan-and-Coil Assembly

Author(s)

• Zeller, S.E.
• Weaver, R.L.
• Dutton, J.C.
• Jacobi, A.M.
• Balachandar, S.

Issue Date

2000-04

Keyword(s)

• fan-and-coil assembly
• acoustics

Abstract

Project 84 concentrated on understanding the noise generating mechanisms of axial-flow fans with the intent of proposing methods of component design and system assembly by which noise generation is reduced or minimized. The project focused on the fan-coil unit typical to room air conditioners and many split-system applications. This report presents the accomplishments of the project, including the design, construction, and qualification of an anechoic chamber, the acquisition of acoustic, flow, and pressure data within a fan-coil unit over a typical operating range, and the development of an understanding of the flow-structure interactions responsible for noise generation in the fan-coil unit. This report focuses on the investigation of a method for measuring the dynamic axial force generated by a fan operating in a steady but spatially non-uniform flow field. Several variations of a measurement system that uses a cantilever beam were tested. Experimental results indicated, in all designs, that the measurement system introduced additional sources of axial motion, occurring at the frequencies of interest and at amplitudes much larger than the one to be measured. Recommendations for future work are given.

Publisher

Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.

Series/Report Name or Number

Air Conditioning and Refrigeration Center TR-164

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/11912

Sponsor(s)/Grant Number(s)

Air Conditioning and Refrigeration Project 84

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