蒸汽喷射器喷射系数的计算方法分析

摘要

The steam ejector is a equipment commonly used to obtain vacuum.It can be used to raise the ejecting fluid pressure without direct mechanical energy consumption.The entrainment ratio of the steam ejector is an important indicator to measure the ejector performance and its calculated value is a key basis to design the steam ejector.Based on three commonly used methods,the calculations of the entrainment ratio were performed on the steam ejectors which were verified by experiments.The obtained results were compared and the application ranges for the design of the three methods were summarized.%蒸汽喷射器是一种常用的真空获得设备,具有不需要直接消耗机械能便能提高引射流体压力的优点.喷射系数是衡量喷射器抽吸性能的重要指标,其数值的获取是喷射器设计的关键问题.以经过试验验证的喷射器为分析对象,采用3种常用的喷射系数计算方法,对喷射系数进行了计算和比较,并对3种方法的设计应用范围作了初步的分析与归纳.