气相爆轰波凹面反射过程尺度效应的实验研究  

Experimental study of reflection process on scale effect of gaseous detonation wave over concave surface

作　　者：景天雨 林庚浩 李健[3] JING Tianyu;LIN Genghao;LI Jian(The System Design Institute of Mechanical-electrical Engineering,Beijing 100854,China;Beijing Glory PKPM Technology Co.Ltd.,China Academy of Building Research,Beijing 100013,China;State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京机电工程总体设计部,北京100854 [2]中国建筑科学研究院有限公司北京构力科技有限公司,北京100013 [3]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《航天器环境工程》2024年第1期74-81,共8页Spacecraft Environment Engineering

基　　金：国家自然科学基金项目(编号:12072036)。

摘　　要：了解气相爆轰波的凹面反射是研究爆轰波在环形管道条件下传播机制的基础。文章针对气相爆轰波凹面反射问题中存在的尺度效应进行实验研究,得到三波点轨迹和临界壁角与几何尺度之间的定量关系,发现了类似于爆轰波楔面马赫反射的尺度效应和2个极限(冻结和平衡极限);进一步研究发现尺度效应高度依赖于2个特征长度尺度(胞格尺寸λ和凹面曲率半径R)。以上研究可为高性能航天推进系统燃烧室的设计提供理论参考。Understanding the gaseous detonation reflection wave on concave surface is the basis for studying the propagation mechanism of detonation wave in annular pipeline.In this paper,the scale effect existing in the concave reflection process of gaseous detonation wave was experimentally investigated.The quantitative relationship between the triple-point trajectory and the critical wall angle with the geometric scale was obtained.The scale effect and two limits(freezing and equilibrium)similar to the detonation wedge Mach reflection were found.Further research revealed that the scale effect was highly dependent on two characteristic length scales,namely,cellular sizeλand concave curvature radius of R.The proposed research may provide a theoretical reference for the design of combustion chamber for high-performance space propulsion system.

关 键 词：胞格爆轰波 气相爆轰波 凹面反射 马赫反射 尺度效应 实验研究 

分 类 号：O381[理学—流体力学] V439[理学—力学]