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在一台轮毂比为０．４９的低速单转子轴流风机上，开展了圆弧斜槽处理机匣的实验研究，以便了解它对风机失速裕度和工作效率的影响，并在此基础上，借助转子进、出口三维流场的测量结果，研究该处理机匣的扩稳机理。另外，通过实壁机匣、轴向斜槽处理机匣的性能及流场测量，对不同处理机匣的作用效果和作用方式进行研究。研究结果表明，圆弧斜槽处理机匣的最大扩稳能力能使该风机的失速裕度较之实壁机匣提高２７％，并且在峰值效率上有１％左右的提高。
On a low-speed single-rotor axial fan with a hub ratio of 0.49, an experimental study of a circular chute tank was carried out to understand its effect on stalling stall and work efficiency of the fan, and on this basis , With the help of the measurement results of the three-dimensional flow field at the inlet and outlet of the rotor, the mechanism of stability expansion of the casing is studied. In addition, through the performance of solid casing and axial chute processing casing and flow field measurement, the effect and the mode of action of different treatment casing are studied. The results show that the maximum chipping stability of the casing with circular chute can increase the stall margin of the fan by 27% compared with that of a solid wall casing and improve the peak efficiency by about 1%.