Backflow phenomena in the inlet of inducer and the flange clearance were described.The cause of pressure diffe-rence between suction surface and press surface was explained.

• 描述了诱导轮进口及轮缘间隙处的回流现象，解释了回流现象发生的原因，即轮缘处叶片压力面和吸力面存在压差；