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通过模拟试验表明：将进风口位置沿轴向向轮盘侧水平移动，可以达到将风机工况点向小流量方向移动的目的，且在（0～0．3）b1范围内调节时，可基本保持风机在设计工况下的较好性能。
Through the simulation test, it is shown that the position of the air inlet is horizontally shifted toward the wheel disk side in the axial direction, and the purpose of moving the fan operating point to a small flow rate can be achieved. When the air inlet is adjusted within the range of (0-0.3) b1, Maintain the fan in the design conditions of the better performance.