可变流阻回路效率特性分析

Analysis on efficiency characteristic of a Viriable Flow Resistance Circuit

将可交流阻过流面积划分为小开口工作区Ａ≤Ａｃ，中开口工作区Ａｃ＜Ａ≤Ａｐ，大开口工作区Ａ＞Ａｐ三种情况．推论出不同开口工作区可变流阻回路效率特性的异同，得到在小开口区可交流阻的效率不超地０．３８５，在中开口工作区可交流阻回路的效率在０．３８５～０．６６７之，在大开口工作区可变流阻回路的效率可大于０．６６７的结论．

In a viriable flow resistance circuit, its through-flow area is divided into three types: small open work region A≤Ac, big one A＞Ap, and medium one Ac＜A＜Ap. So their efficiency characteristics are obtained, they are ηs≤0.385 ηb＞0.667 and 0.385＜ηm＜0.667.