摘要
针对现有对固体火箭发动机推进剂燃烧时产生的羽流流速测量方法的不足,提出了将可调谐半导体激光吸收光谱(TDLAS)技术应用于羽流流速的测量方法,通过测量燃烧产物中H2O分子位于1392 nm处的单根吸收谱线特征,根据多普勒效应建立的光谱频移和分子速度之间的关系来获得气流流速,解决了接触式测量方法会干扰羽流场和传统非接触式测量中示踪粒子不均匀的问题,并且取得了有效试验数据,通过对试验数据进行分析处理,得到了发动机的羽流流速。
In order to overcome the shortcomings of the existing methods for measuring plume velocity produced by solid rocket motor propellant combustion,a tunable diode laser absorption spectroscopy(TDLAS)technique was proposed to measure plume velocity.By measuring the characteristics of a single absorption line of hydrogen peroxide molecule in combustion products at 1392 nm,the spectral frequency shift and molecular velocity were established according to Doppler effect.The relationship was used to obtain the airflow velocity,which solved the problem that the contact measurement method could interfere with the plume flow field and the inhomogeneity of tracer particles in the traditional non-contact measurement,and the effective experimental data are obtained.Futhermore,through the analysis and processing of the experimental data,the plume flow velocity of the engine was obtained.
作者
姚德龙
陈松
YAO Delong;CHEN Song(Weapon Industry Test and Measuring Academy in China,Huayin 714200,China)
出处
《应用光学》
CAS
CSCD
北大核心
2020年第2期342-347,共6页
Journal of Applied Optics
关键词
激光
固体火箭发动机
非接触测量
羽流流速
可调谐半导体激光吸收光谱
laser
solid rocket motors
non-contact measurement
plume flow velocity
tunable diode laser absorption spectroscopy(TDLAS)
