标签 > 小型单缸柴油机净化消声器的设计[编号:83192]
小型单缸柴油机净化消声器的设计
柴油机消声器设计原理一、阻性消声器的原理阻性消声器是利用吸声材料的吸声作用。安装排气消声器是控制排气噪声最直接有效的方法。
小型单缸柴油机净化消声器的设计Tag内容描述:<p>1、第一部分:柴油机消声器设计原理一、阻性消声器的原理阻性消声器是利用吸声材料的吸声作用,使沿管道传播截面积的改变或旁接共振腔等在声传播过程引起声阻抗的改变,产生声能的反射与消耗,从而达到消声目的的消声装置。其主要原理是利用多孔吸声材料来降低噪声。把吸声材料固定在气流通道的内壁上或按照一定方式在管道中排列,就构成了阻性消音器。当声波进入阻性消声器时,一部分声能在多孔材料的孔隙中摩擦而转化成热能耗散掉,使通过消声器的声波减弱。阻性消音器器就好像电学上的纯电阻电路,吸声材料类似于电阻。因此,人们就把这种。</p><p>2、1 is to a to of a on of of of by 2 1. he is s 1, is So is of to of of a of be So it of a s a to to s of is in of of in to s by a 2. of he of to of it be 1) 2)3)is in he of he by is as of is as S ( p + c v )2 (1) = = 10 1 n | 4 1 is of S2 is of p1 is of is of is is s to is to s 3 it as a of a in of 3. of he of of s he its to of s of to on he of s of on : 1: of of 98 105 of to of t of s 0 : 10he in be in So s it no so s be to go s in 0 of of by h。</p>