船用发电机排气消声器声学计算与试验研究

Acoustic calculation and experimental study of marine generator exhaust muffler

船舶主机排气噪声通过排气管路与排气口向外辐射,是影响船舶开敞区域与邻近舱室的重要噪声源。排气消声器是通常采取的排气噪声控制手段,在有限阻力损失基础上提高消声器消声性能是重要的研究课题。本文针对某型船用排气消声器,采用有限元方法开展声学与流场仿真计算并完成了试验测试,计算与试验结果吻合良好,可为排气消声器设计优化与排气系统噪声控制提供参考。

The exhaust noise of ship main engine radiates outward through the exhaust pipeline and exhaust port,which is an important noise source affecting the noise of ship open area and adjacent cabins.Exhaust muffler is a common means of exhaust noise control.Improving the silencing performance of muffler on the basis of limited resistance loss is an important research topic.In this paper,the acoustic and flow field simulation calculation of a marine exhaust muffler is carried out by using the finite element method,and the test is completed.The calculation is in good agreement with the test results,which can provide a reference for the design optimization of exhaust muffler and the noise control of exhaust system.