Noise Reduction Technology - International Civil Aviation
Get A QuoteAccording to the results of the spectrum analysis, we found the noise source and proposed noise reduction measures, namely the establishment of sound insulation room in which the drums and induced draft fan installed, and the wall of the room are appended acoustic sound--absorbing material.
Get A QuoteThe conventional method of treatment is to use passive damping techniques or to redesign the fan. Redesign is often costly and ineffective. In the last decade, resonators and active noise control technique have emerged as a viable technology to reduce the noise levels of centrifugal fans.
Get A QuoteNoise Reduction Technology - International Civil Aviation
Get A QuoteTo date, noise reduction has focused mainly on reducing engine noise. Microinjection system, impacting the main jet, has shown the ability to suppress jet noise through velocity profile modifications.
Get A QuoteAs to the noise pollution of the Hebei University of Engineering north boiler room, we have conducted a series of actual research, monitoring, and analysis of the spectrum of various monitoring sites.
Get A QuoteA key technology for reducing fan noise is acoustic wall treatment, and liners in the inlet and bypass duct provide essential attenuation. Work continues to improve liner performance, but the task of maintaining current levels of liner attenuation will be challenging, given the incentives to make the intake and bypass duct shorter in relation to diameter, and to reduce nacelle length for fuel burn reasons.
Get A QuoteThere are various factors that affect the noise produced by the fan, but our team is currently researching the reduction of the noise from the interaction of the rotor and stator (hereafter, called interaction noise). As shown in figure 2, interaction noise occurs when the …
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