Abstract
Fans used in the cooling of mechanical and electrical equipment are often the major sources of noise. This paper reviews the past and current noise control activities in the fan industry and related trade and professional organizations. Technology trends are discussed. Research needs and priorities are identified. The impact of fan design (blade, housing, and motor) and fan manufacturing (materials and processes) on fan noise and system acoustical quality are discussed. This paper illustrates with examples that fan noise control is more a challenge for design, application, and manufacturing than an investigation of fundamental aeroacoustic mechanisms. The approach is multi‐disciplinary and comprehensive in its treatment of each integration level—from bearings and windings to motor, housing, and end‐use equipment, thereby integrating noise control into fan design and manufacturing to achieve total quality for tomorrow's market.
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