Infrared signature modelling of a rocket jet plume - comparison with flight measurements

[摘要] The infrared signature modelling of rocket plumes is a challenging problem involving rocket geometry, propellant composition, combustion modelling, trajectory calculations, fluid mechanics, atmosphere modelling, calculation of gas and particles radiative properties and of radiative transfer through the atmosphere. This paper presents ONERA simulation tools chained together to achieve infrared signature prediction, and the comparison of the estimated and measured signatures of an in-flight rocket plume. We consider the case of a solid rocket motor with aluminized propellant, the Black Brant sounding rocket. The calculation case reproduces the conditions of an experimental rocket launch, performed at White Sands in 1997, for which we obtained high quality infrared signature data sets from DRDC Valcartier. The jet plume is calculated using an in-house CFD software called CEDRE. The plume infrared signature is then computed on the spectral interval 1900-5000 cm-1with a step of 5 cm-1. The models and their hypotheses are presented and discussed. Then the resulting plume properties, radiance and spectra are detailed. Finally, the estimated infrared signature is compared with the spectral imaging measurements. The discrepancies are analyzed and discussed.

[发布机构] ONERA DOTA, BP 80100, Palaiseau Cedex; 91123, France^1;ONERA DEFA, BP 80100, Palaiseau Cedex; 91123, France^2;DRDC Valcartier, 2459 rue de la Bravoure, Québec; QC; G3J 1X5, Canada^3

[效力级别] 计算机科学 [学科分类] 计算机科学（综合）

[关键词] Aluminized propellants;Combustion modelling;Flight measurements;Infrared signature;Radiative properties;Solid rocket motors;Spectral imaging;Trajectory calculations