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Micro-scale Analysis of Non-equilibrium Phenomena in Highly Rarefied Gas Flows

Research Project

Project/Area Number 13450072
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionNagoya University

Principal Investigator

NIIMI Tomohide  Nagoya Univ.Faculty of Engg., Prof., 工学研究科, 教授 (70164522)

Co-Investigator(Kenkyū-buntansha) NAKAYAMA Hiroshi  Nagoya Univ., Faculty of Engg., Research Assoc., 工学研究科, 助手 (40303656)
HIROTA Masafumi  Nagoya Univ., Faculty of Engg., Associate Prof., 工学研究科, 助教授 (30208889)
石田 敏彦  名古屋大学, 工学研究科, 助手 (50293650)
藤田 秀臣  名古屋大学, 工学研究科, 教授 (10023136)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥15,800,000 (Direct Cost: ¥15,800,000)
Fiscal Year 2002: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2001: ¥11,900,000 (Direct Cost: ¥11,900,000)
KeywordsMicro-Scale / Highly Rarefied Gas Flow / REMPI / Gas-Surface Interaction / Free Molecular Flow / PSP / Non-Equilibrium / Temperature Measurement / 共鳴多光子イオン化法(REMPI) / ファントム粒子モデル / 面一分子干渉
Research Abstract

In this study, we develop the experimental system for 2R+2 N_2-REMPI and apply it to measurement of rotational temperature in a supersonic free molecular nitrogen flow. In the 2R+2 N_2-REMPI technique, nitrogen molecules are ionized, the nitrogen ions are detected as a signal and its spectra depending on the wavelength of an irradiated laser beam are analyzed to measure the rotational temperature through the Boltzmann plot. However, it is found from the experimental results that the number of molecules in the rotational states is not given by the Boltzmann distribution at the measurement point, showing the so-called non-Boltzmann distribution. Now, we are carrying out experiments changing the source pressure and the measurement point as parameters, to clarify the transition from the equilibrium to non-equilibrium in the rotational mode and to obtain the functional form of the non-Boltzmann distribution.
The pressure range of Pressure sensitive paints (PSP) has been limited above 1 Torr (133.3 Pa) and there is no application to lower pressure range because the pressure sensitivity seems to be not so high in that range. In this study, we apply three types of PSP to the rarefied gas flow mainly lower than 1 Torr and examine those fundamental property, such as pressure/temperature sensitivity and time decay of luminescence and so on. Both PtTFPP/poly(TMSP) and Bath-Ru/AA have high sensitivity in the range of pressure lower than 1 Torr. Since the absolute luminescence intensity of PtTFPP/poly(TMSP) is higher than that of Bath-Ru/AA, however, it may better to use the former, judging from a point of S/N.
Using laser induced fluorescence (LIF) of NO seeded in the carrier gas N_2 and a pressure sensitive paint [PtTFPP/poly(TMSP)], we visualize and analyze the flow field structures around the linear-type aerospike nozzle and the complicated pressure distribution on the spike surface successfully.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] 新美 智秀: "REMPIによる超希薄自由分子流中の回転モード内非平衡現象の解析"宇宙航行の力学シンポジウム(平成12年度),宇宙科学研究所. 152-155 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 新美 智秀: "低密度気体流中におけるPSPの評価と応用"可視化情報. Vol.21, Suppl.. 317-320 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 新美 智秀: "PSPの低圧力域における基礎特性に関する研究"日本機械学会論文集(B編). 68,676. 3360-3368 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 新美 智秀: "Application of PSP to Rarefied Gas Flows"10th Int. Symp. on Flow Visualization. (CD-ROM). 0249 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 新美 智秀: "Application of PSP to Low Density Gas Flows"Proc. of 2002 Japan-Korea Joint Seminar on Particle Image Velocimetry. 55-61 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Mori, T.Ishida, Y.Aoki, T.Niimi: "A Study on REMPI as a Measurement Technique for Highly Rarefied Gas Flows (Analyses of Experimental REMPI Spectra in a Supersonic Free Molecular Flows)"JSME Int.J., B. 44-3. 388-394 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Fujimoto, K.Sato, S.Naniwa, T.Inoue, K.Nakashima, T.Niimi: "Visualization of Impinging Supersonic Free Jet on a Tilt Plate by LIF and PSP"J.of Visualization. 4-2. 151-158 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Ishida, S.Adachi, T.Niimi: "Visualization of Interacting Supersonic Free Jets using NO-LIF"Proc.of 6^<th> Asian Symposium on Visualization, CD-ROM. Paper No.121. 410-412 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Niimi, H.Mori, T.Ishida, A.Takasu, K.Niwa: "Application of REMPI to Highly Rarefied Gas Flows"19^<th> Int.Congress on Instrumentation in Aerospace Simulation Facilities. 2001-8. 256-261 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Niimi, M.Yoshida, M.Kondo, Y.Oshima, H.Mori: "Application of PSP to Rarefied Gas Flows"10th Int.Symp.on Flow Visualization, CD-ROM. Paper No.F0249.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Niimi: "Optical Diagnostics of Nonequilibrium Phenomena in Highly Rarefied Gas Flows"23rd Int.Symp.on Rraefied Gas Dynamics. in press. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Mori, A.Takasu, K.Niwa, T.Ishida, T.Niimi: "Spectroscopic Study of Rotational Nonequilibrium, in Supersonic Free Molecular Flows"23rd Int.Symp.on Rarefied Gas Dynamics. in press. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 新美 智秀: "REMPIによる超希薄自由分子流中の回転モード内非平衡現象の解析"宇宙航行の力学シンポジウム(平成12年度),宇宙科学研究所. 152-155 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 新美 智秀: "低密度気体流中におけるPSPの評価と応用"可視化情報. Nol.21,(Suppl.). 317-320 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 新美 智秀: "PSPの低圧力域における基礎特性に関する研究"日本機械学会論文集(B編). 68,676. 3360-3368 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 新美 智秀: "Application of PSP to Rarefied Gas Flows"10th Int. Symp. on Flow Visualization. (CD-ROM)(F0249). (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 新美 智秀: "Application of PSP to Low Density Gas Flows"Proc. of 2002 Japan-Korea Joint Seminar on Particle Image Velocimetry. 55-61 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 新美 智秀: "REMPIによる超希薄気体流の温度非平衡解析"宇宙航行の力学シンポジウム(平成12年度),宇宙科学研究所. 101-104 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 新美 智秀: "A Study on REMPI as a Measurement Technique for Highly Rarefied Gas Flows"JSME International Journal, B. 44-3. 388-394 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 新美 智秀: "Visualization of Impinging Supersonic Free Jet on a Tilt Plate by LIF and PSP"Journal of Visualization. 4-2. 151-158 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 新美 智秀: "Visualization of Interacting Supersonic Free Jets using NO-LIF"Proc. Of 6^<th> Asian Symposium on Visualization. 410-412 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 新美 智秀: "Application of REMPI to Highly Rarefied Gas Flows"19^<th> int. Congress on Instrumentation in Aerospace Simulation Facilities. 256-261 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 新美 智秀: "分子センサーによる希薄気体流の複合計測"可視化情報. 21-83. 240-245 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 新美 智秀: "可視化情報ライブラリー3,光学的可視化法"朝倉書店. 178 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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