连续旋转爆震波传播中的不稳定问题及其形成机制研究

项目名称： 连续旋转爆震波传播中的不稳定问题及其形成机制研究

项目编号： No.51476186

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 能源与动力工程

项目作者： 林志勇

作者单位： 中国人民解放军国防科技大学

项目金额： 83万元

中文摘要： 连续旋转爆震发动机（CRDE）具有结构紧凑、工作频率高、只需一次点火起爆、很适合扩展组合动力以及理论上高性能的特点，是当前国内外新概念推进技术研究的热点之一。但是从目前国内外的研究中都没有发现CRDE明显的性能优势，而对连续旋转爆震波持续工作机理问题的认识不够是重要因素之一。 本项目针对旋转爆震波传播过程中的不稳定机理问题，拟重点采用试验手段，并结合数值模拟和理论分析，结合高频压力传感器和直接开窗观测等实验手段，对旋转爆震发动机中出现的短暂熄爆与再起爆、旋转爆震波传播过程的波头个数演化机制以及双波对撞模式的持续工作过程及其自持机理三个不稳定机制进行研究，从混合物的喷注混合特性、混合物活性以及发动机附面层特性等方面入手，探索形成不稳定现象的机理。项目成果有助于揭示连续旋转爆震波传播机理，对实现连续旋转爆震的工程应用具有重要推动作用。

中文关键词： 连续旋转爆震波；不稳定现象；形成机理；传播过程

英文摘要： Continuous rotating detonation engine (CRDE) could operate continuously with just one initiation, producing a roughly constant thrust, so it has huge potential benefits. However, in the CRDE, only when the fresh gas zone accumulates continuously and the detonation wave propagation velocity deficit is below the critical value can the continuous rotating detonation wave be realized. The present study concentrates on the interactions between the continuous rotating detonation wave propagation and propellant injection processes via experimental observation, theoretical analysis and numerical simulation. The accumulating mechanism of the fresh gas zone will be pointed out, the accumulating process of which will be analyzed quantitatively. Based on the observation results, the flow-field structure and propagation process of continuous rotating detonation wave will be studied quantitatively. The detonation wave propagation velocity deficit caused by the lateral expansion effect will be calculated and compared with the experimental results. The research results would contribute to the understanding of the lasting mechanism of continuous rotating detonation wave, and also have a positive effect on the continuous rotating detonation combustion control and CRDE application.

英文关键词： continuous rotation detonation wave;unsteady phenomenon;formation mechanism;propagation process