固体火箭发动机羽烟紫外辐射特性分析

为了研究推进剂类型和铝粉含量对固体火箭发动机羽烟紫外辐射特性的影响,采用二维流场和三维辐射传输相结合的方式建立羽烟紫外辐射模型,模型中可考虑热发射、CO+O化学发光、OH自由基化学发光、以及不同状态和直径Al2O3颗粒辐射特性等紫外辐射机理。利用模型计算了双基、改性双基和复合推进剂羽烟的紫外辐射分布,并以复合推进剂为例,研究了铝粉含量对羽烟紫外辐射特性的影响。研究结果为紫外预警系统判断导弹的类型,以及导弹紫外隐身性能的提高提供了参考。

Analysis of Ultraviolet Radiation Characteristics of Solid Propellant Rocket Motor Exhaust Plume

To study the effect of propellant type and content of aluminum powder on the ultraviolet radiation of solid rocket motor plume, a plume ultraviolet radiation model is build, using two-dimensional flow-field and three-dimensional radiation transfer calculation, taking thermal emitting, CO+O chemiluminescence, OH radical chemiluminescence, Al2O3 particles of different crystalline states and diameters into consideration. The ultraviolet radiation distributions of double base, modified double base and composite propellant rocket motor plume are calculated, and the effect of aluminum powder content on plume ultraviolet radiation is analyzed, taking composite propellant as an example. This study can provide reference for the judgment of missile type in the process of early warning, as well as improvement of missile ultraviolet stealth performance.