叶轮对蜗壳的面积比面积比(图1、2)的重要性在于:在普遍使用的后弯叶片中,水的旋转速度取决于叶轮自身向前的速度和叶轮内流体向后的相对速度之间的关系。从单纯经验出发,我们可以考虑这样两台 The importance of the area ratio of the impeller to the volute (FIGS. 1 and 2) is that in commonly used backdrhed blades, the rotational speed of water depends on the forward velocity of the impeller itself and the relative velocity of the fluid in the impeller The relationship between. From a simple experience, we can consider two such