首页> 外文期刊>International journal of applied ceramic technology >Ablation Behavior of a Three-Dimensional Carbon/Silicon Carbide Composite Nozzle in an Ethanol/Oxygen Combustion Gas Generator
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Ablation Behavior of a Three-Dimensional Carbon/Silicon Carbide Composite Nozzle in an Ethanol/Oxygen Combustion Gas Generator

机译:三维碳/碳化硅复合喷嘴在乙醇/氧气燃烧气体发生器中的烧蚀行为

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摘要

The ablation properties of a three-dimensional carbon/silicon carbide composite nozzle were investigated via hot-fire testing by an ethanol/oxygen combustion gas generator simulating combustion environments of the liquid rocket engine. The linear ablation rate at the nozzle throat was 0.250 + 0.023 mm/s, and the overall mass ablation rate was 0.246 kg/(m~2s). The ablation in the divergent section, convergent section, and in the regions near the throat grew severe by degree. Ablation mechanisms of the composite nozzle were predominated by the oxidation of the composite, and volatilization of the silica scale derived from oxidation of silicon carbide resulted in further ablation of the nozzle.
机译:通过乙醇/氧气燃烧气体发生器模拟液体火箭发动机燃烧环境的热火试验,研究了三维碳/碳化硅复合喷嘴的烧蚀性能。喷嘴喉部的线性消融速率为0.250 + 0.023 mm / s,整体质量消融速率为0.246 kg /(m〜2s)。在发散段,会聚段以及喉咙附近的区域,消融程度逐渐加重。复合材料喷嘴的烧蚀机理主要是复合材料的氧化作用,而源自碳化硅氧化的二氧化硅垢的挥发导致喷嘴的进一步烧蚀。

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    National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytecbnical University, Xi'an, Shannxi 710072, China;

    National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytecbnical University, Xi'an, Shannxi 710072, China;

    National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytecbnical University, Xi'an, Shannxi 710072, China;

    National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytecbnical University, Xi'an, Shannxi 710072, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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  • 入库时间 2022-08-17 13:43:33

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