典型碳基材料高温界面光谱演化特性实验研究  

Experimental investigations of spectroscopic characteristics in high temperature interface on carbon-based composite materials

作　　者：方思晗 林鑫[1] 杨俊娜 曾徽 欧东斌[3] 李飞[1] 余西龙[1,2] Fang Sihan;Lin Xin;Yang Junna;Zeng Hui;Ou Dongbin;Li Fei;Yu Xilong(State Key Laboratory of High Temperature Gas Dynamics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China;School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China;China Academy of Aerospace Aerodynamics,Beijing Key Laboratory of Arc Plasma Application Equipment,Beijing 100074,China)

机构地区：[1]中国科学院力学研究所高温气体动力学国家重点实验室,北京100190 [2]中国科学院大学工程科学学院,北京100049 [3]中国航天空气动力技术研究院电弧等离子应用装备北京市重点实验室,北京100074

出　　处：《空天技术》2023年第1期159-169,共11页Aerospace Technology

基　　金：国家自然科学基金(92271117,11802315,11927803,11872368,12072355);广东省重点领域研发计划(2021B0909060004);中国科学院青年创新促进会(2022018)。

摘　　要：高焓非平衡环境下防热材料表面特性的科学测试与评价是准确预测飞行器热载荷、热防护材料选择与结构设计的关键。材料表面离解原子数密度与物理化学进程密切相关,由于在高焓非平衡流场中实现防热材料表面原子数密度定量测量难度极大,且有效测量手段异常匮乏,高焓非平衡流场与防热材料特性耦合作用机制仍缺乏清晰认知。为深入探究防热材料表面气-固耦合作用机制,本研究基于发射/吸收光谱融合测量方法,并利用大功率高频感应风洞提供高焓等离子体流场环境,针对典型碳基复合材料开展实验验证。碳基复合材料加热时间为92 s,气流焓值为20 MJ/kg,驻点压力为1.8 kPa。实验获得的光谱结果与宏观规律具有一致性,表明本研究提出的辐射/吸收融合光谱诊断方法具有应用于防热材料与高焓非平衡流高温界面耦合效应研究的潜力。Precise prediction of aerothermal loads and precise design of thermal protection systems are significantly limited by the unclear interactions between the thermal protection system surface and the surrounding high enthalpy gas. Atomic number density is an important parameter because it is closely related to reaction processes. However, due to limited diagnotic methods, it is hard to quantify atomic number density in the high enthalpy flow. To address this, an optical diagnostic method based on optical emission spectroscopy(OES) and laser absorption spectroscopy(LAS) is proposed to investigate coupling mechanisms of gas-surface interactions. Experiments are conducted on a high power inductively coupled plasma wind tunnel. C/C composite material is heated for 92 s with the enthalpy of 20 MJ/kg and the stagnation pressure of 1.8 kPa. The self-consistent results show that it has the ability to diagnose the gas-surface interactions between high enthalpy plasma and thermal protection materials.

关 键 词：高焓非平衡流 气-固耦合效应 电感耦合等离子体风洞 碳基复合材料 激光吸收光谱 发射光谱 

分 类 号：V25[一般工业技术—材料科学与工程]