Table 1.
Basic parameters of the exhaust muffler.
Fig 1.
Structure diagram of the exhaust muffler.
(a) Front view of the device (b) Cross-sectional view of the device (c) Three-dimensional model diagram of the device.
Fig 2.
The mesh diagram of muffler fluid analysis.
Fig 3.
Grid independence.
Fig 4.
Step-length independence.
Fig 5.
Flow chart of finite element analysis.
Fig 6.
Boundary condition of sound field.
Fig 7.
Boundary condition of flow field.
Table 2.
Equipment list for noise measurement test system.
Fig 8.
Schematic diagram of the test bench.
Fig 9.
Transmission loss 1/3 octave test and simulation diagram.
Fig 10.
The curve of sound pressure level without airflow.
Fig 11.
Cloud diagram of the sound pressure level amplitude with the influence of airflow.
Fig 12.
The curve of sound pressure level with airflow.
Fig 13.
The comparison chart of the transmission loss with airflow and without airflow.
Fig 14.
The internal velocity cloud diagram of the muffler with different inlet airflow rates.
Fig 15.
Airflow velocity at different measurement points.