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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。
In this paper, the concept of equivalent diameter was put forward. According to the dimensional analysis theory, the formula of flow resistance around the ball flow was modified to get the relationship between the spool flow resistance and its position in Venturi end VAV valve. In theory, the proposal of designing a pitch spring with cylinder and so on is proposed, which is of instructive significance for numerical calculation of mathematical model.