文丘里型末端变风量阀弹簧设计探讨

On Design of Spring in Venturi Terminal Variable Air Valve

文章提出了当量直径概念，根据量纲分析理论对绕圆球流动的绕流阻力公式进行了修改，从而得出文丘里型末端变风量阀中阀芯绕流阻力与其所处位置的关系，在理论上提出了设计圆柱等节距弹簧的方案，这对建立数学模型进行数值计算有着启发性的意义。

Based on the dimensional analysis and concept of equivalent diameter,a formulae for calculating the flow resistance of a ball is modified,so that the relationship between the flow resistance of the valve core and it's position in the Venturi terminal variable air valve can be obtained.A design scheme of spring with equal pitch in cylinder is proposed.