基于LabVIEW平台的室内湍流特征测试系统研制  

Research and Development of Indoor Turbulence Characteristic Measurement System Based on Lab VIEW

作　　者：李春旺[1] 田沛哲[1] 马晓钧[1] 朱永林[1] 刘赟 

机构地区：[1]北京联合大学生物化学工程学院,北京100023 [2]瑞典SWEMA上海代表处,上海200030

出　　处：《测控技术》2016年第2期124-128,133,共6页Measurement & Control Technology

基　　金：北京市教育委员会科技发展项目(SQKM201411417008)

摘　　要：针对室内空间的低速复杂湍流场,利用LabVIEW开发了一种多点室内湍流测试与特征分析系统,可直接测量并计算出室内气流在时域分析、概率分析、频谱分析和相关性分析中的时序图、平均速度、湍流强度、概率分布直方图、功率密度谱、功率谱曲线β值、自相关、大涡尺度、小涡尺度、湍动能、湍动能耗散、总动能等16种特征指标。通过对一带有机械通风的典型房间的实验测试分析,展示了该系统的测试与分析的功能,验证了特征计算方法的正确性,为评价室内环境和深入分析室内气流结构提供了重要的实用工具。A multi-point measurement system based on Lab VIEW is developed for indoor low velocity complex turbulence,which can directly calculate sixteen kinds of characteristic indexes that are sequence diagram,average velocity,turbulence intensity,probability histogram,power spectral density,power spectrum curve β value,autocorrelation,large eddy scale,small eddy scale,turbulent kinetic energy,turbulent kinetic energy dissipation,total kinetic energy etc in time domain analysis,probabilistic analysis,spectral analysis and correlation analysis.Through the experimental test and analysis of airflow velocity of a typical room with mechanical fan,the applicability of the system is demonstrated and the characteristic calculating method is validated.The system is an utility for the evaluation of the indoor environment and indoor airflow structure analysis.

关 键 词：室内湍流 特征指标 计算方法 LABVIEW 

分 类 号：TH815[机械工程—仪器科学与技术]