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#0 dbbase_sql->halt(Invalid SQL: update pwn_news_con set cl=cl+1 where id='390') called at [/home/ftp/j/jhshqd/includes/db.inc.php:54] #1 dbbase_sql->query(update {P}_news_con set cl=cl+1 where id='390') called at [/home/ftp/j/jhshqd/news/module/NewsContent.php:80] #2 NewsContent() called at [/home/ftp/j/jhshqd/includes/common.inc.php:551] #3 printpage() called at [/home/ftp/j/jhshqd/news/html/index.php:15] 蒸汽消声器的阻抗消声原理-南通江汉石化设备有限公司
蒸汽消声器的阻抗消声原理
作者:管理员    发布于:2017-03-15 15:35:29    文字:【】【】【
蒸汽消声器的抗性是主要建立在“小孔喷注”理论结合阻抗扩容吸声的消声原理,锅炉蒸汽排放一般流
速快,气流噪声高,需先以通孔扩流,经过多次通孔后的蒸汽在抗性扩张室得到降流,气流再经小孔
喷出,把低频和中频的声音往高频移动,当频率达到20000Hz以上人耳就听不见了。
蒸汽消声器的阻性是全靠消音棉吸收能量。
南通江汉石化设备有限公司