Title of Paper:Numerical research on infrared radiation characteristics of plume of engine influenced by cross-flow injecting forms

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Affiliation of Author(s):能源与动力学院

Journal:Hangkong Dongli Xuebao

Abstract:Numerical study was done under the circumstances of the same total mass flow rate and the total temperature of inlet at 840 K to research the suppression effect of infrared radiation of plume of the engine in different kinds of cross-flow injecting forms. The cross-flow device was designed at the orifice of axisymmetric convergent nozzle. The injection of cross-flow intensified the mixing of plume and outer air flow and thus decreased the length of high-temperature region. It is found that the mixing effect is distinctly worse than single or double oppositely injected when cross-flow is circumferentially injected. At side detection plane, the suppression effect of infrared radiation of single and double opposite injecting comes very close when azimuthal angle is bigger than 20°, but the latter one is slightly better and has a maximum drop of 71.6%. At underneath detection plane, the infrared radiation intensity of single and double opposite injecting is stronger than that at side detection plane, and the latter has a close value when cross-flow is circumferentially injected. At above detection plane, compared with other injecting forms, the infrared radiation intensity of single injecting is relatively weak and reaches a maximum drop of 78.4%. © 2017, Editorial Department of Journal of Aerospace Power. All right reserved.

ISSN No.:1000-8055

Translation or Not:no

Date of Publication:2017-02-01

Co-author:He, Zhe-Wang,jhh,Li, Wei

Correspondence Author:zb