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试验采用了先进的激光测速仪,对在三种工况Q优、0.88Q优、0.66Q优D280-160型注水泵导叶扩散管的内流场进行了无干扰测量。内流场的测定结果表明,最优工况及其附近工况的速度沿b向分布均匀,而流速沿a向分布的峰值靠近压力面,不及沿b向的分布均匀性好;自导叶入口至喉部降速较快;随着流量的下降,脱流现象更为严重。因此,针对该泵导叶扩散管的水力设计不太理想的情况,文章提出了几点改进措施。
The experiment uses an advanced laser gun to conduct a non-interference measurement of the internal flow field of the diffuser of the guide vane of D280-160 water injection pump with Q-optimized, 0.88Q-excellent and 0.66Q-excellent performance in three operating conditions. The results of the internal flow field show that the optimum working conditions and the working conditions nearby are distributed uniformly in the direction b while the peak value of the flow velocity along the a is close to the pressure surface and the distribution uniformity is not as good as that in the b direction. Entrance to the throat slowed down; with the decline in flow, shedding phenomenon is more serious. Therefore, for the pump diffuser vane hydraulic design is not ideal situation, the article proposed several improvements.