利用流体中温度噪声信号的相关分析进行流速测量

Fluid Velocity Measurement by Using the Correlation Analysis of the Temperature Noise Signals in Fluid

通过对流体中存在的温度噪声信号的相关分析,进行相关技术用于测量气体流速的实验研究与理论分析.首先,利用相关测量系统的数学模型在PC机上进行了仿真研究,为分析各参数对相关函数的影响、改进测量方法以及研究误差产生的原因,从理论上提供了依据.其次,简要介绍了所用的实验装置、实测结果以及进一步提高测量精度的途径.

In this paper by means of correlation analysis of the temperature noise in fluid, experiment and theoretical analysis are performed for applying this technology to the measurement of gas flow velocity.First, the mathematical model of correlation measurement system is simulated on an IBM-PC computer.It provides theoretical evidence for analyzing the parameter influence on cross-correlation function, improving measurement method, and studying the cause of errors.Then, the experimental equipment, measurement results,and the way of further improving measurement accuracy are introduced briefly.