Development of a High Performance Arc-Heater Which Can Provide High Atomic Oxygen Density Flow

一种可提供高原子氧密度流量的高性能电弧加热器的研制

• 批准号: 14350507
• 负责人: KOMURASAKI Kimiya
• 金额: $ 10.62万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14350507/
• 关键词: high-enthalpy flow; arc-heater; atomic oxygen; laser absorption spectroscopy

A zirconia-coated cathode was applied to our arc-heater to achieve a flow containing high number density of atomic oxygen. In addition, multi-pass cell type highly sensitive laser absorption spectroscopy system with an external cavity was developed to enhance its sensitivity by two to three orders.1.Development of an arc-heater with a zirconia-coated zirconium cathodeThe arc-heater with an oxygen injection port located at the center of cathode (a hollow cathode) showed high erosion rate at the cathode tip and could survive only for several minuets. Therefore, we tested a zirconia-coated zirconium cathode instead and the oxygen was supplied from the cathode base via premixed gas with argon. As a result, it could operate for more than 3 hours without serious erosion. Furthermore, almost perfect dissociation of the oxygen was achieved.2.multi-pass cell type highly sensitive laser absorption spectroscopy systemTo optically access relatively low temperature but high degree of dissociation flow by the laser absorption spectroscopy method, we tested the multi-pass type sensitivity enhancement method. Although, last year, we tried the intra-cavity method, mode-hopping during the laser frequency scanning occurred too often to have the meaningful line shape of the absorbers. Therefore, this year, we tested the cavity-enhanced method, resulting in the enhancement by 400 times.

我们的电弧加热器采用氧化锆涂层阴极，以获得含有高原子氧数密度的气流。此外，还研制了一种多程池式高灵敏激光吸收光谱系统，使其灵敏度提高了2 ~ 3个数量级。1.氧化锆涂层锆阴极电弧加热器的研制在阴极中心（空心阴极）有一个注氧口的电弧加热器，其阴极尖端的腐蚀速率很高，只能维持几分钟。因此，我们替代地测试了氧化锆涂覆的锆阴极，并且通过与氩气预混合的气体从阴极基底供应氧气。因此，它可以运行超过3小时而不会发生严重腐蚀。2.多程池型高灵敏度激光吸收光谱系统为了通过激光吸收光谱方法光学访问相对低温但高解离度的流，我们测试了多程型灵敏度增强方法。尽管去年我们尝试了腔内方法，但在激光频率扫描期间，模式跳变经常发生，以至于吸收体的线形不具有意义。因此，今年，我们测试了腔增强方法，结果增强了400倍。

项目成果

Performance of arcjet-type atomic-oxygen generator by laser absorption spectroscopy and CFD

激光吸收光谱和CFD对电弧喷射式原子氧发生器性能的影响

• 发表时间: 2004
• 期刊: Vacuum 73
• 作者: Makoto Matsui;Kimiya Komurasaki et al.
• 通讯作者: Kimiya Komurasaki et al.

Diagnosis of a Inductively Coupled Plasma Generator Using the Laser Absorption Spectroscopy(in Japanese)

使用激光吸收光谱法诊断电感耦合等离子体发生器（日语）

• 发表时间: 2005
• 期刊: Japan Society of Aeronautical and Space Sciences 53(619)
• 作者: Makoto MATSUI;et al.
• 通讯作者: et al.

Enthalpy Measurement in Inductively Heated Plasma Generator Flow by Laser Absorption Spectroscopy

通过激光吸收光谱法测量感应加热等离子体发生器流中的焓

• 发表时间: 2005
• 期刊: AIAA Journal Vol.43, No.9
• 作者: Kenji Morita;Kazuyuki Aihara;Keiichi Gunji;Keiichi Gunji;Makoto Matsui;Makoto Matsui
• 通讯作者: Makoto Matsui

高反射ミラーによるレーザー吸収分光法の感度向上

使用高反射镜提高激光吸收光谱的灵敏度

• 发表时间: 2006
• 期刊: プラズマ応用科学 13
• 作者: 高柳大樹;他3名
• 通讯作者: 他3名

レーザー吸収分光法を用いた誘導過熱風洞気流診断

使用激光吸收光谱进行诱导过热风洞气流诊断

• 发表时间: 2005
• 期刊: 日本航空宇宙学会誌 53・619
• 作者: 松井信;他3名
• 通讯作者: 他3名