摘要
气体运动速度的非接触在线测量在发动机等高速流场实验研究中具有重要意义。基于吸收光谱技术中吸收谱线的多普勒频移效应,设计并搭建了高速气流测速系统,对经过拉瓦尔喷管加速的高速气流速度进行了实时在线检测。实验选用H2O在1392 nm附近的特征吸收谱线,基于LabVIEW程序进行数据采集与处理得到实时流速。在此基础上,分析了该系统的速度测量极限,为后续系统进一步优化及整体装置的开发奠定了基础。
Non-contact on-line measurement of gas velocity is of great significance in the experimental study of high-speed flow field such as engines.Based on the Doppler frequency shift effect of absorption line in gas absorption spectrum technology,a high-speed airflow velocity measurement system is designed and constructed,and the speed of airflow accelerated by Laval nozzle is measured online in real time.In the experiment,the characteristic absorption line of H2O near 1392 nm is selected,and data acquisition and processing are conducted based on LabVIEW to obtain real-time velocity.On this basis,the speed measurement limit of the system is analyzed,which lays a foundation for further optimization of the follow-up system and development of the overall device.
作者
韩雨佳
陈钻
薛志亮
吴迎春
吴学成
HAN Yu-jia;CHEN Zuan;XUE Zhi-liang;WU Ying-chun;WU Xue-cheng(Institute for Thermal Power Engineering,Zhejiang University,Hangzhou 310027,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2019年第6期686-691,共6页
Laser & Infrared
