混合比和燃烧组分浓度测量系统的原理和设计(英文)

Principle and Design of a Measuring System of Mixture Ratio and Combustion Species Concentration

研制了一套新型测量系统,系统由YGA激光器、染料激光器、晶体组、CCD摄像机、图像处理系统和附件等组成.与反斯托克斯拉曼散射、激光诱导荧光、平面激光诱导荧光和拉曼散射系统相仿,该系统具有测量燃烧组分浓度的功能.此外,它还可以测量喷嘴氧化剂和燃料的混合比分布,测量参数是给定时间内给定区域的统计值.系统已经成功用于液体火箭发动机气/气喷嘴、气/液喷嘴和液/液喷嘴喷雾场混合比分布特性研究,并已用于CO、CO2、No、NO2、OH和H2O(g)等燃烧产物组分的浓度测量,这种新系统将成为液体火箭发动机工作过程研究的有力分析工具.

A new measuring system is developed. This system consists of YAG laser, dye laser, groups of crystals, CCD camera, synchronizer, light sheet unit, image analysis system and accessories. It is able to obtain the statistical average of parameter measured in specific area and specific period similar to systems of Coherent Anti-Stokes Raman Scattering, Laser- Induced Fluorescence, Degenerate Four Wave Mixing, Planar Laser-Induced Fluorescence and Spontaneous Raman scattering. The combustion species concentration, especially mixture ratio can be measured by the new system. The system has been successfully used to measure the mixture ratio of gas/gas, gas/liquid or liquid/liquid type injectors and concentration of combustion species including OH, CO, CO2, NO, NO2 and H2O vapor. The system will be the powerful tool of liquid propellant rocket engine work process research.