期刊
PROPELLANTS EXPLOSIVES PYROTECHNICS
卷 46, 期 4, 页码 636-653出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/prep.202000091
关键词
Solid rocket motor; Numerical simulation; TDLAS; Velocity measurement
Accurate measurement of plume velocity using laser Doppler effect and TDLAS is effective in determining the energy level of solid propellants. Results show that TDLAS is a reliable method, with NEPE having the highest plume velocity and DB having the lowest. The study also examines uncertainties in velocity measurement and suggests placing measurement position near the nozzle exit to reduce errors.
Accurate measurement of plume velocity plays an important role in investigation of rocket motors, and the plume velocity is an indicator of energy level of solid propellants. A method based on laser Doppler effect using tunable diode laser absorption spectroscopy (TDLAS) is employed in this study. The absorption spectrum of water vapor feature at 1391.7 nm is utilized to measure the plume velocity. Three solid propellants, double-base (DB), composite modified double-base (CMDB), and nitrate ester plasticized polyether (NEPE) i. e., are burned in a motor with an internal diameter of 50 mm and their plume velocities are measured with scanned-WMS-2f technique. Afterburning reactions in the plume are numerically simulated. The simulations can provide insight into the nuances in measured TDLAS results and give confidence in the result. The results show that TDLAS is a good method to measure plume velocity. The relative standard deviation of the measurements is less than 4 %. The difference between the measured velocity and the simulated one is less than 8.25 %. Additionally, it is found that NEPE has the largest plume velocity, and the velocity of DB is the lowest. Uncertainties of velocity measurement using TDLAS are analyzed. Measurement uncertainty comes from velocity non-uniformity in the direction perpendicular to the plume direction. Furthermore, it can be found that it is better to put the measurement position close to the nozzle exit to reduce measurement errors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据