本文介绍空气螺旋桨的基本理论在辆流式通风机设计中的应用。作者根据基本理论推导出了风机叶轮设计计算的实用公式,并提出了设计程序。文章首先描述绕风机叶轮的气流图;气流通过叶轮工作面时没有轴向速度的突变,仅发生环向的诱导气流。根据剖面气流速度矢量图建立了剖面气流角φ和环向干涉因 This article introduces the basic theory of air propeller in the application of flow fan design. Based on the basic theory, the author deduces the practical formula of fan impeller design and calculation, and puts forward the design procedure. The article first describes the airflow map around the fan impeller; airflow through the impeller face no sudden change in axial velocity, only the annular induced air flow. According to the cross-sectional airflow velocity vector diagram, the cross-sectional airflow angle φ and the circumferential interference factor are established