朱希娟, 李霞, 王俊, 刘兴润. 三种典型流动状态下的喷流红外辐射特性[J]. 红外与激光工程, 2013, 42(4): 850-856.
引用本文: 朱希娟, 李霞, 王俊, 刘兴润. 三种典型流动状态下的喷流红外辐射特性[J]. 红外与激光工程, 2013, 42(4): 850-856.
Zhu Xijuan, Li Xia, Wang Jun, Liu Xingrun. Infrared radiation of plume in three typical flow state[J]. Infrared and Laser Engineering, 2013, 42(4): 850-856.
Citation: Zhu Xijuan, Li Xia, Wang Jun, Liu Xingrun. Infrared radiation of plume in three typical flow state[J]. Infrared and Laser Engineering, 2013, 42(4): 850-856.

三种典型流动状态下的喷流红外辐射特性

Infrared radiation of plume in three typical flow state

  • 摘要: 计算了欠膨胀状态、设计状态和过膨胀状态三种典型流动状态下的轴对称收扩喷管在3~5 m波段的喷流红外辐射传输特性,并对三种状态的计算结果进行了分析比较。流场采用有限体积法和重整化群(RNG)k-湍流模型求解N-S方程得到,喷流的红外辐射强度采用有限体积法结合窄带模型求解吸收发射性介质辐射传输方程得到。计算结果显示:欠膨胀状态的喷流红外辐射强度最大,设计状态与过膨胀状态的喷流红外辐射依次降低,随天顶角的增大差距增大,这与喷流的流动特点有关,说明喷流流动特点的改变影响红外辐射的大小,通过控制喷流的流动可以控制喷流红外辐射强度。

     

    Abstract: The infrared radiation in 3-5 m band of axisymmetric Laval nozzle in underexpanding, designing and overexpanding conditions were simulated by a three-dimensional(3-D) exhaust system infrared radiation code. The 3-D flow field of the jet was simulated numerically by finite volume method(FVM), RNG k- turbulence model, and the infrared(IR) radiation code of the plume was developed by FVM coupled with narrow band model in non-gray absorbing-emitting media. The results indicate that the plume IR radiation intensities of underexpanding state are maximal, those of the designing and overexpanding decrease in turn, which related to flow characteristics, it illuminates that the IR radiation of plume canbe affected by the flow characteristics, that canbe controlled by controlling the flow.

     

/

返回文章
返回