渦街流量計在沼氣測量中的應用

    渦街流量計在沼氣測量中一般都要通過縮徑方式來測量。通常我們選擇法蘭卡卡式和法蘭式2zhongjiegouxingshi
，xuanxingshiyidingyaoxuanlejieyixiazhaoqizuixiaoliuliang，changyongliulianghezuidaliuliang。daduoshuzhaoqiceliangchangsuomeiyoudianyuan，womenkeyixuanzedianchigongdiandewojieliuliangji。ruguoyonghuxuyaojiangbiaodexianshiyindaoshinei，keyicaiyongyitishiwojieliuliangji
，tongguodianlanxianjiangshuchuxinhaoyindaozhuangzaishineideliuliangjisuanyishang
，wojieliuliangjikeyixianshizhaoqishunshiliuliangheleijiliuliang。
    渦wo街jie流liu量liang計ji在zai測ce量liang沼zhao氣qi安an裝zhuang流liu量liang計ji的de時shi候hou
，安an裝zhuang點dian的de上shang遊you較jiao近jin處chu若ruo裝zhuang有you閥fa門men，不bu斷duan地di開kai關guan閥fa門men，對dui傳chuan感gan器qi的de使shi用yong壽shou命ming影ying響xiang極ji大da
，非fei常chang容rong易yi對dui傳chuan感gan器qi造zao成cheng永yong久jiu性xing損sun壞huai、chuanganqijinliangbimianzaijiakongdefeichangchangdeguandaoshanganzhuang，zheyangshijianyichanghou
，youyuchuanganqidexiachuifeichangrongyizaochengchuanganqiyufalanjiandemifengxielu，ruobudeyiyaoanzhuangshi

，bixuzaichuanganqideshangxiayou2D處分別設置管道緊固裝置。
    為了確保渦街流量計完整的功能
，入口處的流型應不受幹擾。上遊直管段部分的長度應為流量計口徑(D)的大約15倍
，下遊直管段部分的長度應為流量計口徑(D)的大約5倍(bei)。在(zai)流(liu)體(ti)中(zhong)設(she)置(zhi)非(fei)流(liu)線(xian)型(xing)漩(xuan)渦(wo)發(fa)聲(sheng)體(ti)，則(ze)從(cong)漩(xuan)渦(wo)發(fa)生(sheng)兩(liang)側(ce)交(jiao)替(ti)地(di)產(chan)生(sheng)兩(liang)列(lie)有(you)規(gui)則(ze)的(de)漩(xuan)渦(wo)，這(zhe)種(zhong)漩(xuan)渦(wo)稱(cheng)為(wei)卡(ka)曼(man)渦(wo)街(jie)。在(zai)一(yi)定(ding)的(de)流(liu)量(liang)範(fan)圍(wei)內(nei)漩(xuan)渦(wo)分(fen)離(li)頻(pin)率(lv)正(zheng)比(bi)於(yu)管(guan)道(dao)內(nei)的(de)平(ping)均(jun)流(liu)速(su)，經(jing)漩(xuan)渦(wo)發(fa)生(sheng)體(ti)中(zhong)裝(zhuang)入(ru)電(dian)容(rong)探(tan)頭(tou)或(huo)壓(ya)電(dian)探(tan)頭(tou)(探測器)及配置相應電路，即構成了電容檢測式渦街流量計或壓電檢測式渦街流量傳感器。