Analysis of the Effect of Length and Angle of Vane of Composite Scrubber with Built-in Vane Type Silencer on Engine Back Pressure and Noise Reduction

The noise of ships has an adverse effect on crew members, marine ecosystems and residents around ports when moored. In addition, the sulfur content of the fuel was limited to 0.1% in the emission control area and 0.5% outside the emission control area. Therefore, there is a need for a complex application of noise reduction and sulfur oxide reduction technology. In this paper, the effect of the vane length and angle of a composite scrubber with a vane type silencer attached to the scrubber for removing sulfur oxides from the exhaust gas was analyzed on engine back pressure and noise reduction. Wet scrubber and vane type silencer were designed as one device. The length of the vane was changed from 150 mm to 200 mm and the angle of the vane was changed from 0° to 40°. The noise reduction performance was the highest under the condition of not exceeding the allowable pressure of the target engine at a vane length of 200 mm and an angle of 40°.