超高温多相流燃烧物质红外辐射特性的计算

Computed the Infrared Radiated Characteristic of the Hyperthermal Multi-phase Flowing Combustion

超高温多相流燃烧研究在快速飞行的航天飞行器应用领域中至关重要。本文依据固体火箭发动机喷焰超音速射流燃烧中产生大量的氧化铝固体颗粒群和多组分气体实际应用为背景,结合粒子浓度的实际特征,建立固体颗粒群粒子浓度分布模型,并根据粒子质量加权平均直径经验公式,计算它们在波长3～5!m范围内的空间红外辐射强度随温度场的分布。同时对燃烧过程中产生的几种多组分接近完全气体,计算其热传导系数,为进一步开展相关红外特性研究和建立用于超高温多相燃烧红外辐射理论模型提供重要依据。

According to the research of the hyperthermal multiphase flow combustion,it is important to the air- craft in aerospace application fields. As an important example, there exists a group of Aluminum-Oxide Particles and a great many of gas in the exhausted hypertherrnal multiphase flow combustion plumes of solid rocket motors. The actual properties of these particles are combined with to build a model on their density.Tbe model and the empirical formula of the mass weighted mean diameter have been utilized to compute the infrared radiated characteristic with the temperature in waveband 3~5p, m.The coefficients on thermal transmittance of several kinds gas in multiphase flowing combustion.The results offered a base to further study on building a hyperthermal multiphase flow combustion model.