| The factors affecting the nozzle's flux are involved in this paper. By changing the L/R, shrinking angle, diameter and pressure of the nozzle, the paper studies the feature of flux under different experimental situation. It concluded the major factors that influenced the flux by using of SAS software. It showed that there is no relativity between L/d and flux, and the same thing with shrink angle and flux. Based on these analyses, an experimental formula is established. And, it got the common factors to describe all the factors that influenced the nozzle's feature. So it shows the way to the further study of nozzle.
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