Micro-scale Analysis of Non-equilibrium Phenomena in Highly Rarefied Gas Flows
高度稀薄气流中非平衡现象的微观分析
基本信息
- 批准号:13450072
- 负责人:
- 金额:$ 10.11万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2001
- 资助国家:日本
- 起止时间:2001 至 2002
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
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.
本研究发展了2 R +2N_2-REMPI实验系统,并将其应用于超声速自由氮分子流中旋转温度的测量。在2 R +2N_2-REMPI技术中,氮分子被电离,氮离子作为信号被探测,通过分析其随激光波长变化的光谱,利用玻尔兹曼曲线测量转动温度。然而,从实验结果中发现,在测量点处,处于转动状态的分子的数量不是由玻尔兹曼分布给出的,显示出所谓的非玻尔兹曼分布。现在,我们正在进行改变源压力和测量点作为参数的实验,阐明了转动模从平衡态到非平衡态的转变,并得到了非玻尔兹曼分布的函数形式。压敏漆(PSP)的压力范围被限制在1 Torr以上(133.3 Pa),并且不适用于较低的压力范围,因为在该范围内压力灵敏度似乎不那么高。本研究中,我们将三种类型的PSP应用到主要低于1 Torr的稀薄气体流中,并研究了它们的基本特性,如压力/温度灵敏度和发光的时间衰减等,PtTFPP/poly(TMSP)和Pt-Ru/AA在低于1 Torr的压力范围内都具有很高的灵敏度。由于PtTFPP/poly(TMSP)的绝对发光强度比PtTFPP/poly(TMSP)高,但从S/N的角度来看,PtTFPP/poly(TMSP)的绝对发光强度比PtTFPP/Ru/AA的绝对发光强度高。成功地可视化和分析了线型塞式喷管的流场结构和塞体表面复杂的压力分布。
项目成果
期刊论文数量(48)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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)
Tomohide Niimi:“PSP 在低密度气流中的评估和应用”可视化信息,(增刊)217-320。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
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)
T.Niimi、H.Mori、T.Ishida、A.Takasu、K.Niwa:“REMPI 在高度稀薄气流中的应用”第 19 届航空航天模拟设施仪表国际大会。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
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)
Tomohide Niimi:“REMPI 在高度稀薄气流中的应用”第 19 届航空航天模拟设施仪表大会。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
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)
新见智秀:“可视化信息库3,光学可视化方法”朝仓书店178(2001)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
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)
Tomohide Niimi:“低密度气流中 PSP 的评估和应用”可视化信息,第 21 卷,增刊 317-320 (2002)。
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- 影响因子:0
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NIIMI Tomohide其他文献
NIIMI Tomohide的其他文献
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{{ truncateString('NIIMI Tomohide', 18)}}的其他基金
Development of smart micro-channel with functional molecular sensor
功能分子传感器智能微通道的研制
- 批准号:
23656132 - 财政年份:2011
- 资助金额:
$ 10.11万 - 项目类别:
Grant-in-Aid for Challenging Exploratory Research
Multidimensional and Multivariable Combined Simultaneous Measurement on High Knudsen Number Micro Flows
高努森数微流多维多变量联合同步测量
- 批准号:
21246034 - 财政年份:2009
- 资助金额:
$ 10.11万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Photonic Analyses of High Knudsen Number flows
高努森数流的光子分析
- 批准号:
18360086 - 财政年份:2006
- 资助金额:
$ 10.11万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Micro-scale Analysis of High Knudsen Number Flows
高努森数流动的微观分析
- 批准号:
15206020 - 财政年份:2003
- 资助金额:
$ 10.11万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
A study on image recognition of three-dimensional objects by undestroyed photorefractive optical memory using two wavelengths
两种波长无损光折变光存储器三维物体图像识别研究
- 批准号:
09650064 - 财政年份:1997
- 资助金额:
$ 10.11万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
An analy of high entalpy flows using PLIF
使用 PLIF 分析高熵流
- 批准号:
08455091 - 财政年份:1996
- 资助金额:
$ 10.11万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Visualization and Measurement of Rarefied Gas Flow using O_2-PLIF
使用 O_2-PLIF 实现稀薄气流的可视化和测量
- 批准号:
04650147 - 财政年份:1992
- 资助金额:
$ 10.11万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
Flow Visualization & Measurement of Two-dimensional Temperature Field in the Rarefied Gas Flow Using LIF (Laser Induced Fluoresence)
流动可视化
- 批准号:
02650131 - 财政年份:1990
- 资助金额:
$ 10.11万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)