A model of mode transition logic in dual-mode scramjet engines

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• 作者：Xinyue Hao¹ ; ^{xinyueh_27@163.com" class="auth_mail" title="E-mail the corresponding author} ; Juntao Chang ; ² ; ^{changjuntao@hit.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Wen Bao ; ³ ; ^{baowen@hit.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Zexu Zhang⁴ ; ^{zexuzhang@hit.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Dual-mode scramjet engine ; Mode transition logic ; Simulation model
• 刊名：Aerospace Science and Technology
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：49
• 期：Complete
• 页码：173-184
• 全文大小：3616 K

文摘

Intricate process of mode transition exists in dual-mode scramjet engines, mainly amongst three typical operation modes (i.e., scramjet mode, ramjet mode and unstarted mode). Based on the analysis of an original analytical model, four transition boundaries are defined, and several corrections and considerations are carried out to clarify the way how to develop a model of mode transition logic. The complete mode transition logic is presented in a flowchart with a calculated case, and the corresponding implementation method for simulation is specified with programs in the paper. Combining the present mode transition logic unit with the original analytical parts, a dual-mode scramjet engine model for simulation, in which the inlet unstart issue is mainly caused by the interaction between thermodynamic effect and geometrical effect, could be acquired.