摘要：用一个内部转子是的 contra-rotating 在转子的一把西洛可风扇子在内安定西洛可风扇子转子和各个转子在一个相反的方向旋转为得到更高的压力并且做一把西洛可风扇子的结构的目的被建议更紧缩。如果高分泌物压力随 contra-rotating 转子的采纳被获得，它能被用于各种各样的目的。有 contra-rotating 转子的一把西洛可风扇子的压力系数比一把常规西洛可风扇子 2.5 倍高于常规西洛可风扇子和到更大的流动率的 contra-rotating 转子移动的最大的效率点。在另一方面，它从流动测量结果被澄清在 contra-rotating 转子的外部转子的插头的那个周围速度部件变得比常规的大。在现在的纸，有 contra-rotating 转子的一把常规西洛可风扇子和一把西洛可风扇子的表演被显示出，在两个盒子的外部转子的插头的内部流动地被澄清。然后，表演和内部流动地上的 contra-rotating 转子的不同类型的效果被调查，有高效的转子设计将被讨论。

摘要：Mini turbo-pumps having a diameter smaller than 100mm are employed in many fields;automobile radiator pump,ventricular assist pump,cooling pump for electric devices,washing machine pump and so ***,the needs for mini turbo-pumps would become larger with the increase of the application of it for electrical *** is desirable that the mini turbo-pump design is as simple as possible due to restriction to make precise *** the design method for the mini turbo-pump is not established because the internal flow condition for these small-sized fluid machineries is not clarified and conventional theory is not conductive for small-sized *** types of rotors with different outlet angles are prepared for an experiment and a numerical *** performance tests are conducted with these rotors in order to investigate the effect of the blade outlet angle on performance and internal flow condition of mini *** is clarified from the experimental results that head of the mini turbo-pump increases and maximum efficiency flow rate shifts to larger flow rate according to the increase of the blade outlet angle,however the maximum efficiency decreases with the increase of *** the present paper,the performance of the mini turbo-pump is shown and the internal flow conditions are clarified with the results of the experiment and the numerical flow ***,the effects of the blade outlet angle on the performance are investigated and high performance design with simple structure for the mini turbo-pump would be considered.

摘要：Small-sized axial fans are used as air cooler for electric *** there is a strong demand for higher power of fans according to the increase of quantity of heat from electric ***,higher rotational speed design is conducted,although,it causes the deterioration of efficiency and the increase of ***,the adoption of contra-rotating rotors for the small-sized axial fan is proposed for the improvement of *** the case of contra-rotating rotors,it is necessary to design the rotor considering the unsteady flow condition of each front and rear *** the present paper,the fan performance of the contra-rotating small-sized axial fan with 100mm diameter at a designed and a partial flow rates is shown,and the unsteady flow conditions at the inlet and the outlet of each front and rear rotor are clarified with unsteady numerical ***,the relation between the performance and the unsteady flow condition of the contra-rotating small-sized axial fan is discussed and the methods to improve the performance are considered.