Paper 2: Noise of Industrial Diesel Engines

Abstract
The characteristics and level of the noise emitted by stationary diesel engines of the type used in power houses are considered. With gas sources adequately silenced the spectrum of the noise of the automotive engine has a pronounced peak in the frequency range 1000–2000 c/s whereas the larger stationary engine shows a peak at a much lower frequency. Most notable among the constructional differences are the exposed flywheel and in many cases panelled crankcase; the significance of these design features is discussed. The authors have attempted to isolate the various noise sources: combustion and mechanical (particularly piston slap). The contributions to the total noise of the individual outer surfaces, such as crankcase frame, flywheel, cylinder head and various covers and panels, are also discussed in detail.

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