清华大学学报（自然科学版）2025，Vol.65Issue(9)：1609-1620,12.DOI:10.16511/j.cnki.qhdxxb.2024.27.039
中国空间站气体射流火焰科学实验进展
Gas jet flame science experiments aboard the China Space Station
摘要
Abstract
[Significance]Experimental conditions in microgravity differ considerably from those in Earth's normal gravity.Combustion experiments conducted in microgravity eliminate the effects of natural convection and simplify the complex factors of combustion processes.Combustion experiments can reveal many physical and chemical phenomena only under normal gravity conditions,providing significant insights for fundamental scientific research.Meanwhile,microgravity combustion experiments allow a deeper investigation into the fundamental physical phenomena of advanced combustion issues,serving as a crucial means for basic research.This research supports China's energy and power industries in addressing the needs related to energy conservation,emission reduction,and green energy transition,as well as those related to fire prevention on the ground and in space.[Progress]The China Space Station(CSS)is planned to support combustion science experiments using multiple fuel types,including gaseous,liquid,and solid fuels,in orbit.The first series of CSS combustion experiments consisted of gaseous combustion experiments,a few of which were conducted in the combustion science rack(CSR).This article reviews the progress of microgravity jet flame research and introduces types of scientific research that can potentially be supported by the combustion science application system and gaseous combustion experiment insert(GCEI)in the CSR.The combustion science experiment system provides the GCEI with the necessary resources,such as water cooling,electricity,and gas emissions.The GCEI supports gas-flow regulation functions,allowing the adjustment of the gas type,flow rate,and ignition power based on the project's scientific objectives.The GCEI features a universal burner platform and can adjust the gas composition,flow rate,and ignition energy.Various types of flames can be generated by replacing the project burners.Optical diagnostics conducted outside the optical windows of the combustion chamber provide data on the flame dynamics,flow fields,and spatial distributions of OH and CH.Currently,astronauts aboard the CSS have installed an igniter in the gas experiment module and mounted the GCEI in the CSR combustion chamber.The GCEI automatically completes a series of actions,including configuring the combustion environment gas,ejecting the fuel gas,heating the igniter,determining parameters,performing optical diagnostics,filtering and circulating,and exhausting waste gases.Because of the lack of buoyancy effects,microgravity flames exhibit considerable differences compared to normal gravity flames.After transmitting the experimental data to the ground operation control center,the control and monitoring of the experimental conditions are performed to confirm the normal operation of each subsystem.The fuel,oxidizer,and inert-gas flow rates are set according to predetermined delays and settings,demonstrating the normal operation of key modules,such as the GCEI's fuel gas cylinder module,gas-distribution solenoid valve,igniter,and oxidizer and diluent subsystems of the CSR.The image intensifier camera of the combustion diagnostic subsystem captures corresponding OH and CH emission images,demonstrating an increase in the flame width and a rapid decrease in the flame height until localized extinction occurs at the end of the non-premixed flame.[Conclusions and Prospects]The present study verifies that the GCEI can effectively realize microgravity flames for gaseous experiments in orbit and provide a support and design basis for subsequent diversified combustion science experiments.The GCEI is expected to provide valuable data and platform support for subsequent microgravity experiments aboard the CSS.关键词
中国空间站/燃烧科学实验系统/燃烧科学实验柜/气体燃烧实验插件/微重力燃烧Key words
China Space Station/combustion science application system/combustion science rack/gaseous combustion experiment insert/microgravity combustion分类
航空航天引用本文复制引用
刘有晟,姚强,李星贤,温禹哲,郑会龙,杨肖芳,张晓武,贺宇峰,曹娇坤,杜昌帅..中国空间站气体射流火焰科学实验进展[J].清华大学学报（自然科学版）,2025,65(9):1609-1620,12.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 （）
