应用人工透射边界法计算水消声器传递损失

Application of local artificial transmitting boundary in calculating transmission loss of water muffler

在海水管路系统中,为抑制泵和阀门所产生的流噪声,通常在管路中安装水消声器,水消声器的传递损失是评价其消声性能的一个重要指标。采用有限差分—局部人工透射边界法对水消声器的传递损失进行数值计算,其结果与实验中采用双传感器法测得的水消声器传递损失进行比较,相互吻合较好,表明有限差分—局部人工透射边界法具有较高的精度。

It is a common practice to fix mufflers in pipes in order to restrain flow noise caused by pump and valve in seawater piping system. Transmission loss of water muffler is an important index for evaluating performance of muffler. This paper discusses the use of finite difference-local artificial transmitting boundary technique in numerical calculation of transmission loss of water muffler. The results derived from the use of finite difference coincide with the results derived from the use of two-transducers in calculating transmission loss of water muffler in experiments. The finite difference-local artificial transmitting boundary technique proves more accurate.