Numerical Analysis of Suction Mufflers

Reduction of the Compressor Inlet Infrasound Emission

The infrasounds attenuation is inefective mainly because of the lon~ sonic wave diffraction, so that the reduction of the infrasounds source is the only acceptable method. Unfortunately low frequency pressure pulsation has the great influence on the compressor operation. -Each change in suction line results in change of compressor volumetric efficiency. The paper presents examples of numerical ...

Acoustics of Suction Mufflers with Multiple Chambers

In recent years there has been a growing focus on reducing the suction noise from hermetic household compressors. One approach is to reduce the transmitted sound power through the suction muffler at particular frequencies. In order to better control the acoustic performance of the muffler, a large variety of muffler designs have emerged. Most notably is the appearance of mufflers with two or mo...

Acoustics of Suction Mufflers in Reciprocating Hermetic Compressors

Investigation of the efficiency of various reactive mufflers by noise reduction and transmission loss analyses

Transmission loss and noise reduction of reactive mufflers are determined by linear acoustic theory and unsteady flow field study, respectively. The effects of extending the inlet tube of the muffler, adding holes to the extension, and the number of holes on both transmission loss and noise reduction are investigated. In noise reduction analysis, the Navier-Stokes equations and k-ε model are us...

Shape Optimal Design on Double-Chamber Mufflers Using Simulated Annealing and a Genetic Algorithm

Whilst the space volume of mufflers in a noise control system is often constrained for maintenance and operation in practical engineering work, the maximization of the muffler’s performance becomes essential. In this paper, both simulated annealing (SA) and a genetic algorithm (GA) are applied simultaneously. A numerical case of pure tone noise control is introduced. Before optimization, one ex...