摘要
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 regarded as basic re- quirements of liquid droplet streams. With the use of propagation of standard deviation, the relative standard deviation of the axial velocity of droplets can be evaluated from the measured a series of time—gaps between successive droplets. An expression for the relative standard deviation of the axial velocity of droplets is derived, and the measuring apparatus for time-gaps between successive droplets is described. A new method to measure angular dispersion of liquid droplet streams with several optical fiber probes has been developed. The counted numbers of droplets at several angle regions were done at a consecutive period, after modification, the droplet numbers at different regions of the direction angle were obtained.
出处
《宇航计测技术》
CSCD
北大核心
1993年第2期52-57,共6页
Journal of Astronautic Metrology and Measurement
基金
国家自然科学基金
关键词
液滴束流
速度弥散
流量
测量
Liquid droplet, Velocity dispersion, Angular dispersion, Flow measurement, Standard deviation
