一、前言 离心叶轮出口流场的特性研究对了解叶轮内部流动机理、估计扩压器性能、提高叶轮机械效率有十分重要的意义.为能快速、有效地对该流场详细测量,本文建立了微机控制的实时数据采集、分析系统,并利用微机、瞬态波形存储器发展了在叶轮转动一周时对周向各测点同时采样的技术,同时提出了适用于单丝热线探针测量的数据处理公式.最 I. Introduction The study on the characteristics of flow field at centrifugal impeller exit is very important for understanding the internal flow mechanism of impeller, estimating the performance of diffuser and improving the mechanical efficiency of impeller.In order to measure this flow field rapidly and effectively, Computer-controlled real-time data acquisition and analysis system, and the use of micro-computer, transient waveform memory developed a week when the impeller rotation of the measuring points at the same time sampling the same time, put forward for the monofilament probe measurement hotline data processing Formulas