Engine noise is mainly from exhaust noise. Without adding muffler, at a certain speed, the noise up to 100 decibels. Reduce engine exhaust noise, and to high-temperature exhaust gas can be safely and effectively. Muffler as part of exhaust pipe, should ensure that the exhaust flow, resistance and sufficient strength. This research takes an exhaust silencer as a study object, and a muffler sound...

Gas pulsation in the discharge side of rotary compressor is one of the main sources of noise, so the discharge muffler is widely used to decrease the gas pulsation and noise level. Investigations on pressure pulsation in the muffler can provide not only a method to evaluate the muffler design and modification, but also a base for advanced study of noise in rotary compressor. In this paper the m...

In these review paper different types of mufflers and design of exhaust system belonging engine has been studied. The object of this study is decide muffler design which one reduces a large amount of noise level and back pressure of engine. In designing, there is different parameter which has to taken in to the consideration. These parameters affect the muffler efficiency.

This pape,r describes a flow-visualizatio n technique that was employed to qualitatively evaluate the gas flow pattern inside a small, low side, hermetically sealed, re ciprocating refrigeration compressor. The applicable compressor des igns are those in which the suction gas from the evaporator is dumped into the compressor shell, and is then drawn through a muffler into the suction plenum of ...

Design of muffler system strongly influences engine efficiency and noise level. Hence, comprehension of flow characteristics inside muffler system is very important. In this study, numerical study of three-dimensional steady and unsteady compressible flow inside muffler system attached to 4-cylinder engine was performed to identify the flow characteristics. To obtain the boundary conditions for...

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...

Mufflers are widely used for exhaust noise attenuation in vehicles and machinery. Recent advances in modeling procedures for accurate performance prediction have led to the development of modeling methods for practical muffler components in commercial design. Muffler designers need simple and fast modeling tools, especially in the preliminary design evaluation stages. Finite Element and Boundar...

To understand the mechanisms of neuronal Zn2+ homeostasis better, experimental data obtained from cultured cortical neurons were used to inform a series of increasingly complex computational models. Total metals (inductively coupled plasma-mass spectrometry), resting metallothionein, (65)Zn2+ uptake and release, and intracellular free Zn2+ levels using ZnAF-2F were determined before and after n...