| 非烧蚀型防热材料烧蚀性能初步试验研究 |
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| 引用本文： | 刘初平,孟松鹤,杜百合,王国林.非烧蚀型防热材料烧蚀性能初步试验研究[J].实验流体力学,2009,23(3):50. |
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| 作者姓名： | 刘初平 孟松鹤 杜百合 王国林 |
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| 作者单位： | 哈尔滨工业大学航天学院,哈尔滨,150001 |
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| 摘 要： | 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.
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| 关 键 词： | 超高温陶瓷 等离子体风洞 烧蚀试验 |
Preliminary tests of non-ablative thermal protection materials |
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| LIU Chu-ping,MENG Song-he,DU Bai-he,WANG Guo-lin.Preliminary tests of non-ablative thermal protection materials[J].Experiments and Measur in Fluid Mechanics,2009,23(3):50. |
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| Authors: | LIU Chu-ping MENG Song-he DU Bai-he WANG Guo-lin |
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| Abstract: | 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. |
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| Keywords: | UHTC plasma wind tunnel ablative test |
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