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本文用LDV测量了最优工况和小流量工况下，输送运动粘度为48mm2／s高粘油时，蜗壳第Ⅳ、Ⅵ和Ⅷ断面内的时均切向、径向速度。给出了角动量随半径的变化关系，并与输送粘度为1mm2／s水时的角动量进行了比较。
In this paper, the average tangential and radial velocities in the IV, VI and VIII sections of the volute were measured with LDV under the conditions of the best working condition and the low working condition with the viscosity of 48mm2 / s. The relationship between angular momentum and radius was given and compared with the angular momentum when the viscosity was 1mm2 / s.