CAJ | 학술논문

介绍了在CARDC等离子体风洞中开展的非烧蚀型防热材料超高温陶瓷(UHTC)的试验研究结果.对Φ20mm平头圆柱体试验模型,采用亚声速驻点试验技术,在驻点热流478W/cm2,气流焓值27.9MJ/kg,环境压力18kPa条件下,分别对代号C(15、10)型、Y型、S(30、15、10)型3种材料模型进行了试验研究,并对模型试验前后的长度变化、质量变化以及模型表面温度进行了测量,初步分析了模型的表观变化、抗氧化特性和表面辐射特性.结果表明:Y型模型试验前后表观变化不大,表面温度达到1930℃;S型模型表面生成一层薄氧化层,稳定情形下模型表面温度达到1964℃;C型模型表面烧蚀严重,模型表面温度达到2462℃,防热性能最差.
개소료재CARDC등리자체풍동중개전적비소식형방열재료초고온도자(UHTC)적시험연구결과.대Φ20mm평두원주체시험모형,채용아성속주점시험기술,재주점열류478W/cm2,기류함치27.9MJ/kg,배경압력18kPa조건하,분별대대호C(15、10)형、Y형、S(30、15、10)형3충재료모형진행료시험연구,병대모형시험전후적장도변화、질량변화이급모형표면온도진행료측량,초보분석료모형적표관변화、항양화특성화표면복사특성.결과표명:Y형모형시험전후표관변화불대,표면온도체도1930℃;S형모형표면생성일층박양화층,은정정형하모형표면온도체도1964℃;C형모형표면소식엄중,모형표면온도체도2462℃,방열성능최차.
The test results of non-ablative ultra-high temperature ceramic materials (UHTC) in one of the plasma wind tunnels of CARDC are introduced in this paper. Three types of materials, namely model C (15、10) ,Y and S(30、15、10),were tested under a subsonic condition with stagnation point heat flux of 478W/ cm2,enthalpy of 27.9 MJ/kg and stagnation point pressure of 18kPa. The test models were in flat cylinder shape with a diameter of 20mm. The length variation and mass loss and surface temperature of each test model were measured .Test results showed that model Y surface temperature reached 1930℃ with little surface char-acteristics change,model S surface temperature reached 1964℃ with an oxidation layer formed and model C surface temperature reached 2462℃ yet experienced severe ablation. Preliminary analyses of the tested materi-als in terms of surface characteristics change, anti-oxidation characteristics and surface radiation characteristics are also presented.