摘要
为了研究火箭发动机缩比模型对应尾喷焰辐射特性的相似性,利用喷焰红外辐射特性计算工具(IRSAT)对近地面飞行状态下的不同喷口缩比尺寸、飞行马赫数以及不同谱带内的辐射特性进行仿真计算。计算结果表明,相同尺寸当量时,2.7μm光谱辐射强度增加量大于4.3μm光谱辐射强度;在当量尺寸较小且缩放比例不大(R<12)时,辐射强度随马赫数的分布具有一致性;随着当量尺寸的增加,红外辐射相似性随着马赫数的增加逐渐降低。
The scaling model of the rocket motor is usually used for experimental measurements in the motor design,so the research of related similarity of infrared radiation characteristics has an important engineering value.The infrared radiation signature analysis tool（ IRSAT） was used to predict the irradiances of plumes at a close-to-ground altitude.Calculation cases involved different nozzle exit sizes,flight Mach numbers and spectral bands.Results show that the spectral radiance in the 2.7 μm band is higher than that in the 4.3 μm band at the same exit size.When the equivalent size is small and the scaling ratio is less than 12,the variation trends of radiation intensity as a function of Mach number are highly consistent.With the increase of the equivalent nozzle size,the similarity of infrared radiation gradually decreases as the increase of Mach number.
作者
牛青林
贺志宏
陈彪
郑麒麟
董士奎
NIU Qinglin;HE Zhihong;CHEN Biao;ZHENG Qilin;DONG Shikui(Key Laboratory of Aerospace Thermophysics, Ministry of Industry and Information Technology, Harbin Institute of Technology,Harbin 150001 ,China)
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2018年第3期295-302,共8页
Journal of Solid Rocket Technology
基金
国家自然基金(51576054)
关键词
尾喷焰
红外辐射
固体火箭发动机
缩比尺寸
复燃
exhaust plume
infrared radiation
solid rocket motor
scaling model
afterburning
