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With the steady increase in the number of cars, the exhaust sounds generated from the exhaust pipes of cars became a serious noise problem. Noise like this is called high frequency exhaust noise and shock waves are considered to play an essential role for the generation of the exhaust noise. Consequently it became necessary to reduce shock waves and to reduce the exhaust noise from the remaining shock waves by attaching a silencer to the exhaust pipes. Using the same calculation method, a numerical analysis of the propagation of shock waves was carried out using several different silencer models with internal structures of comparatively simple numerical analysis.

Study on the Behavior of Flow and the Reduction of the Shock Waves in Silencer