DESIGN OF A THERMOACOUSTIC MODULE OF A VEHICLE ENGINE

The use of a thermoacoustic module of a vehicle engine as part of an exhaust system is one of the promising ways to reduce the noise of exhaust gases. The importance of using the module is determined by promising norms for the noise level of exhaust gases from the engine, according to which a noise reduction of up to 71 dBA is required. The efficiency of using the thermoacoustic module is achieved by the cooling of exhaust gases at 150-200 °C, reducing the emission noise by more than 2 dB. The article presents the main issues of the thermometering of a vehicle internal combustion engine and experimental data obtained as a result of thermometry. The process of thermometering of the exhaust system is the acquisition of data on the temperature distribution of the exhaust gases at the required points of the system. The purpose of thermometering of an internal combustion engine is to choose the location for the thermoacoustic module of the automobile engine and to develop recommendations for its application. The data of the engine exhaust thermometering are used to select the main design parameters of the module and structural materials for the casing elements of the thermoacoustic module, the parts of a heat exchanger, and to choose the material of foamed metal.