清华大学学报（自然科学版）2025，Vol.65Issue(9)：1705-1716,12.DOI:10.16511/j.cnki.qhdxxb.2024.27.048
用于空间站微重力燃烧实验的声场狭缝燃烧器设计及地面测试
Design and ground testing of an acoustic slot burner for microgravity combustion experiments aboard the China Space Station
摘要
Abstract
[Objective]Microgravity environment on the space station decouples buoyancy from other limit effects on flame instability.The decoupling facilitates the study dynamical response and associated theories of edge flame under vortical and acoustic excitation.Such research can contribute significantly to the theory development for flame instability control and prevention in energy and power systems and fire suppression mechanisms under microgravity conditions within spacecraft.[Methods]The paper introduces the design and initial testing of an experimental apparatus aboard the China Space Station(CSS)for generating and studying acoustic or vortices disturbed edge flames.The apparatus comprises an acoustic slot burner and an optical module,installed on the gaseous combustion experiment insert within the Combustion Science Rack(CSR)aboard the CSS.Compared to traditional co-flow structures,the slot design assures a better control of shear effects and flow field uniformity,allowing more precise control of flame characteristics.Diagnostic methods are introduced to create and capture oscillating edge flames in orbit.The optical module and high-speed CCDs in the CSR are used for two-dimensional temperature inversion of flames.Structural optimization and unique optical beam-splitting design improve diagnostic accuracy and flame visibility.This setup provides a controlled environment to study the effects of vortical structures and acoustic disturbances on flame oscillations.[Results]A set of ground testing experiments were conducted to verify the response of edge flames to acoustic disturbances across different acoustic frequencies and vortical disturbances generated by shear layers.At low vortex intensities,the edge flames exhibit low-frequency vertical oscillation patterns,while at high vortex intensities,the flames display high-frequency horizontal oscillation patterns.Under extreme stretching conditions,edge flames can even extinguish.Based on this analysis,future experiments are planned to refine the stability and extinction diagram boundaries of edge flame oscillation.Additional ground experiments and microgravity data will be collected to provide a comprehensive understanding of edge flame behavior under different shear layer strengths and acoustic frequencies.These experiments aim to develop a robust theoretical framework for predicting and controlling flame oscillations and instabilities,contributing to safer and more efficient energy and power systems.[Conclusions]The design of the experimental apparatus for the CSS represents a significant advancement in the study of edge flame dynamics under microgravity.The initial results from ground tests demonstrate the complex interaction between flame behavior and external disturbances,which has direct implications for flame stability control in various applications.The stable operating conditions identified through ground experiments will serve as a reference for future experiments conducted in microgravity,where key parameters such as flame structure,response frequency,oscillation modes,and temperature field distribution will be further analyzed.Continued research in this field promises to enhance our understanding of combustion processes in both terrestrial and space environments,ultimately contributing to safer and more efficient energy systems.关键词
中国空间站/部分预混火焰/燃烧科学实验/微重力/燃烧器设计Key words
China Space Station/partially premixed flame/gas jet flame/microgravity/burner design分类
航空航天引用本文复制引用
温禹哲,李星贤,李龙飞,刘有晟..用于空间站微重力燃烧实验的声场狭缝燃烧器设计及地面测试[J].清华大学学报（自然科学版）,2025,65(9):1705-1716,12.基金项目
中国载人航天工程办公室空间应用系统科学实验项目,国家重点研发计划项目(2021YFA0716201) （2021YFA0716201）
