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轴向速度弥散和角向弥散是液滴束流在多数应用中的基本要求。利用标准偏差的传递关系,通过测量相继液滴飞行到测量位置的一组时间间隔,可得液滴束流轴向速度的相对标准偏差。推导了相对标准偏差的表达式,描述了测量相继液滴时间间隔的装置。研究用若干根光纤测量液滴束流角向弥散的新方法,已测得几个角度范围内的液滴记数,经修正,得到了对应不同方向角范围的液滴数。
Axial velocity dispersion and angular dispersion are the basic requirements of the droplet beam in most applications. Using the standard deviation transfer relationship, the relative standard deviation of the axial velocity of the droplet stream can be obtained by measuring a set of time intervals at which successive drops fly to the measurement location. Derived the relative standard deviation of the expression, describes the device to measure the time interval between successive droplets. In this paper, a new method of measuring the angular dispersion of a droplet beam with several optical fibers has been studied. The number of droplets in several angles has been measured and corrected to obtain the number of droplets corresponding to different directions.