• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Thermophysics and Heat Transfer >Measurements of Carbon Dioxide Nonequilibrium Infrared Radiation in Shocked and Expanded Flows
【24h】

Measurements of Carbon Dioxide Nonequilibrium Infrared Radiation in Shocked and Expanded Flows

机译：冲击和膨胀流中二氧化碳非平衡红外辐射的测量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents the first efforts in measuring carbon dioxide infrared radiation under nonequilibrium expansion, such as encountered in wakes, when carbon dioxide undergoes recombination. This work is motivated by the lack of radiation measurements in this flow and thermodynamic regimes, whereas carbon dioxide infrared radiation is deemed to contribute significantly to the afterbody heating withstood by a Martian spacecraft. The Hypervelocity Expansion Tube facility at Japan Aerospace Exploration Agency's Chofu Aerospace Center is operated at the flight binary-scaled conditions of a mission currently considered at Japan Aerospace Exploration Agency. The test flow in front and after a scaled aeroshell is characterized with a combination of analytical formulations, numerical simulations, flow measurements, and schlieren diagnostics. Pressure and shock standoff measurements are presented. The thermodynamic state of the flow and its degree of nonequilibrium are discussed. Spatial infrared radiation measurements are obtained from the shock layer to the wake of the model. A noticeable increase of carbon dioxide infrared radiation is observed in the wake of the spacecraft: the reasons of which are discussed. Shock standoff distance measurements are complemented by carbon dioxide infrared spectra measurements. The latter outline the highly complicated vibrational energy distribution of carbon dioxide in the expansion tube and the subsequent radiation, as well as the possible shortcomings of the multitemperature models. Therefore, these first measurements of carbon dioxide nonequilibrium radiation in high-enthalpy facilities pose new challenges to the community and will enable the upgrade and validation of the multitemperature and state-to-state models, as well as radiation models currently in use.
机译：本文介绍了测量二氧化碳在非平衡膨胀下（例如尾流中遇到的二氧化碳）重组时二氧化碳红外辐射的首次尝试。这项工作是由于缺乏在这种流动和热力学条件下的辐射测量结果而引起的，而二氧化碳红外辐射被认为对火星航天器承受的车身后部加热起了重要作用。日本航空航天探索局调布航空中心的超高速膨胀管设施是在日本航空航天探索局目前正在考虑的飞行任务的二进制飞行度条件下运行的。通过组合分析公式，数值模拟，流量测量和schlieren诊断，可以对按比例缩放的机身前后的测试流进行表征。给出了压力和冲击距离测量。讨论了流体的热力学状态及其不平衡度。从冲击层到模型唤醒都获得了空间红外辐射测量值。在航天器尾流中观察到二氧化碳红外辐射明显增加：讨论了其原因。防震距离测量得到二氧化碳红外光谱测量的补充。后者概述了膨胀管中二氧化碳的高度复杂的振动能量分布以及随后的辐射，以及多温度模型的可能缺点。因此，这些高焓设施中二氧化碳非平衡辐射的首次测量给社区带来了新的挑战，并将使多温度和状态到状态模型以及当前使用的辐射模型的升级和验证成为可能。

著录项

  • 来源
    《Journal of Thermophysics and Heat Transfer》 |2018年第2期|483-494|共12页
  • 作者

    Takayanagi H.; Lemal A.; Nomura S.; Fujita K.;

  • 作者单位

    Japan Aerosp Explorat Agcy, Chofu Aerosp Ctr, Aeronaut Technol Directorate, Aerodynam Res Unit 2, 7-44-1 Jindaiji Higachi Machi, Chofu, Tokyo 1828522, Japan;

    Japan Aerosp Explorat Agcy, Chofu Aerosp Ctr, Aeronaut Technol Directorate, Aerodynam Res Unit 2, 7-44-1 Jindaiji Higachi Machi, Chofu, Tokyo 1828522, Japan;

    Japan Aerosp Explorat Agcy, Chofu Aerosp Ctr, Aeronaut Technol Directorate, Aerodynam Res Unit 2, 7-44-1 Jindaiji Higachi Machi, Chofu, Tokyo 1828522, Japan;

    Japan Aerosp Explorat Agcy, Chofu Aerosp Ctr, Aeronaut Technol Directorate, Aerodynam Res Unit 2, 7-44-1 Jindaiji Higachi Machi, Chofu, Tokyo 1828522, Japan;

  • 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
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号