An analy of high entalpy flows using PLIF

使用 PLIF 分析高熵流

• 批准号: 08455091
• 负责人: NIIMI Tomohide
• 金额: $ 4.99万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455091/
• 关键词: High Entalpy Flow; LIPF; Oxygen; Temperature Measurement; Density Meaurement; Excimer Laser; Non-equilibrium; Electric Furnace

O_2-LIPF method is based on using the overlap of ArF excimer laser (193nm) emission and the Schumann-Runge B (v'=4) * X (v"=0) absorption system of O_2, which has discrete absorption lines from 175 to 250 nm and continuum absorption band from 130 to 175 nm. Because the B state is predissociated strongly, the fluorescence yields prior to intermolecular collision, showing very small life time of 10^<-12>s. Therefore, the collisional quenching has not to be taken into account under the condition of low pressure.We propose a new method for the 2-D temperature measurement technique using the LIPF (Laser-induced predissociative fluorescence) of O_2 molecules excited by a broadband ArF excimer laser. In this method, temperature is measured by use of temperature dependence of rations between fluorescence intensities integrated in two spectral regions. The method is applied to heated air flows using a CCD camera and two band pass filters, which pass through the different spectral regions, and the feasibility of this methods is examined successfully.

O_2-LIPF 方法基于使用 ArF 准分子激光 (193nm) 发射和 O_2 的 Schumann-Runge B (v'=4) * X (v"=0) 吸收系统的重叠，该系统具有来自 175 的离散吸收线至 250 nm 和 130 至 175 nm 的连续吸收带 由于 B 态强烈预解离，因此在分子间碰撞之前产生荧光，显示出非常强的荧光。寿命较短，为10^<-12>s，因此，在低压条件下不必考虑碰撞淬火。我们提出了一种使用LIPF（激光-激光）的二维温度测量技术的新方法。由宽带 ArF 准分子激光器激发的 O_2 分子的诱导预解离荧光）在该方法中，通过使用两个光谱区域中集成的荧光强度之间的比率来测量温度。该方法应用于加热的空气。使用 CCD 相机和两个带通滤波器（穿过不同的光谱区域）进行流动，并成功检验了该方法的可行性。

项目成果

Tomohide Niimi: "Temperature Measurement of High Temperature Air Flows using O2-LIPF" Symposium on Flight Mechanics and Astrogynamics. 85-88 (1997)

Tomohide Niimi：“使用 O2-LIPF 测量高温气流”飞行力学和天体力学研讨会。

Tomohide Niimi: "O2-LIPF Technique for Temperature Measurement of Hot Air Flows" FLUCOME'97. Vol.2. 989-993 (1997)

Tomohide Niimi：“用于热气流温度测量的 O2-LIPF 技术”FLUCOME97。

Tomohide Niimi: "Development of a Method for Temperature Measurement using O2-LIPF" Fluid & Heat Engig.Research. 32-1. 67-74 (1997)

Tomohide Niimi：“开发使用 O2-LIPF 进行温度测量的方法”流体

新美智秀: "O_2-LIPFを用いた高温空気流の温度計測法(広帯域レーザーを利用した温度計測)" 日本機械学会論文集(B編). 63-610. 2029-2035 (1997)

Tomohide Niimi：“使用O_2-LIPF的高温气流的温度测量方法（使用宽带激光的温度测量）”日本机械工程师学会会刊（B版）63-610（1997年）。

Tomohide Niimi: "A Stuudy of a Method for Temperature Measurement of High Temperature Air Flows by O2-LIPF" Transaction of JSME. B63-610. 2029-2035 (1997)

Tomohide Niimi：“O2-LIPF 高温气流温度测量方法的研究”JSME 交易。