Development of engineering calculation and design methods for mufflers of gas compressor units with gas turbine drive

摘要

Calculating method allows to get acoustic characteristics of non-homogeneous plate mufflers. Practical realizability of this method extending potential to work out of noise muffling facilities in gas-air ducts and their potential development. In fact, efficiency of classical homogeneous plate mufflers determines by least damped mode parameters of sound vibrations, which is dominant. There is a potential possibility of field structure maintenance in non-homogeneous mufflers, which energy determines by relatively quickly damped modes as far as least damped mode could be changed continuously or stepwise when lining characteristics are changed in sound propagation direction. In this case non-coincidence between actual mode composition of sound fields and mode structure with minimal attenuation is achieved. Moreover when absorbing properties are changed stepwisely along the sound propagation, reflection effects are taking place. In this case muffler is not only dissipative, but it takes on the properties of reactive muffler. Present experience of computational models application shows that these models are not guarantee the optimal muffler construction. Therefore in observed task exact calculation could be only as element of calculating method because it is impossible to estimate all varieties. Simplified scheme is based on required physical concept. And scheme parameters optimization will be achieved in final phase of checking calculation.