因此，提出了一种通过改善蜗舌附近压力区的均匀性的、新的变螺旋角蜗壳设计方法。
Therefore a new design method with varying spiral angles of volute was proposed by means of focus on improving the uniformity of pressure field near the tongue of the volute.
蜗壳的每一节，在下料时需要绘制展开图，采用数解法进行展开，即常用的坐标法或三角形法。
When the material is prepared, each pipe is required to draw its developed map by using mathematics analysis, that is, common coordinate method and triangular method.
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