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0引言近年来,涡街流量计开始步入过热蒸汽流量测量领域,并取得了一些令人满意的效果。涡街流量计发展速度之快、应用范围之广是不少流量计所不及的。究其原因,还是由其自身特点所决定的。涡街流量计不存在零位漂移,无可动部件,高可靠性,量程范围较宽,测量准确度高,压力损失小[1](仅为节流式差压流量计的1/4~1/2)。将涡街流量计
0 Introduction In recent years, vortex flowmeter into the field of superheated steam flow measurement, and achieved some satisfactory results. Vortex flowmeter rapid development, wide range of applications is not many flow meter. The reason is still determined by its own characteristics. Vortex flowmeter does not exist zero drift, no moving parts, high reliability, wide measuring range, high measurement accuracy, small pressure loss [1] (only for the throttle differential pressure flow meter 1/4 ~ 1/2). Will vortex flowmeter