Development of the forced Rayleigh scattering method with CO_2 laser

CO_2激光强制瑞利散射法的研制

• 批准号: 02555046
• 负责人: NAGASHIMA Akira
• 金额: $ 4.29万
• 依托单位: Faculty of Science and Technology, Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02555046/
• 关键词: Thermophysical Properties; Thermal diffusivity; Forced Rayleigh scatttering method; Measuring technique; Optical method

The results obtained from the present research project are summarized as follows.1. An apparatus to measure the thermal diffusivity of wide variety of substances without adding the dye material using CO_2 laser by the forced Rayleigh scattering method was developed. The characteristics of the apparatus is that the grating period can be adjustable from 20 mum to 300 mum and laser beam can be irradiated not only from horizontally but vertically on the sample.2. In order to confirm that this apparatus can be applicable to liquids, we measured thermal diffusivity of toluene and water using 7-nSe cell windows. We found the optimum measuring conditions through experimental examinations by changing adjustable parameters such as grating period, sample thickness and heating time.3. We developed the free surface heating method which does not require the cell windows. It was verified that this method has the advantage when the method is applied to high temperature conditions.4. The error factors (the beam off-center problem and sample thickness) were experimentally investigated.5. Thermal diffusivity of the mixture of Li_2CO_3-Na_2CO_3-K_2CO_3 = 41.5 : 31.5 : 25.0 mol% was measured using sapphire glass cell in the temperature range from 677 K to 970 K with the reproducibility of +^^-10%.

本研究项目的主要研究成果如下： 1．研制了一种无需添加染料材料、利用CO_2激光强制瑞利散射法测量多种物质热扩散率的装置。该装置的特点是光栅周期在20μm～300μm范围内可调，激光束既可以水平照射也可以垂直照射在样品上。 2．为了证实该装置可以适用于液体，我们使用 7-nSe 池窗测量了甲苯和水的热扩散率。通过改变光栅周期、样品厚度、加热时间等可调参数，通过实验检验找到了最佳测量条件。 3．我们开发了不需要单元窗口的自由表面加热方法。验证了该方法在高温条件下的应用具有一定的优势。 4．对误差因素（光束偏心问题和样品厚度）进行了实验研究。 5．采用蓝宝石玻璃比色皿测量了Li_2CO_3-Na_2CO_3-K_2CO_3 = 41.5 : 31.5 : 25.0 mol%混合物的热扩散率，温度范围为677 K至970 K，重现性为+^^-10%。

项目成果

清水 雄三: "CO_2レ-ザ-を用いた強制レイリ-散乱法の研究(第2報:溶融塩用測定装置の開発)" 第12回日本熱物性シンポジウム講演論文集. 57-60 (1991)

清水雄三：“使用CO_2激光的强制瑞利散射法的研究（第2次报告：熔盐测量装置的开发）”第12届日本热物理特性研讨会论文集57-60（1991）。

Y. Shimizu: "Experimental stidy of the forced Rayleight scattering method with CO_2 laser, 1st report, Development of experimental apparatus" Proc. 28th National Heat Transfer Symposium of Japan. 859-861 (1991)

Y. Shimizu：“CO_2 激光强制瑞利散射法的实验研究，第 1 份报告，实验装置的开发”Proc.

清水 雄三: "CO_2レ-ザ-を用いた強制レイリ-散乱法の研究(第1報:装置の開発と溶融塩の予備的測定)" 日本機械学会論文集. (1992)

Yuzo Shimizu：“使用CO_2激光的强制瑞利散射法的研究（第1次报告：熔盐的设备开发和初步测量）”日本机械工程学会会刊（1992）。

Y. Shimizu: "Experimental study of the forced Rayleigh scattering method with CO_2 laser 2nd report, Development of experimental apparayus for molten salts" Proc. 12th Japan Symposium on Thermophysical Properties. 57-60 (1991)

Y. Shimizu：“CO_2激光强制瑞利散射方法的实验研究第二报告，熔盐实验装置的开发”Proc。

清水 雄三: "CO_2レ-ザ-を用いた強制レイリ-散乱法の研究(第3報:溶融炭酸塩の測定)" 第13回日本熱物性シンポジウム講演論文集. (1992)

清水雄三：“使用CO_2激光的强制瑞利散射法的研究（第三次报告：熔融碳酸盐的测量）”第13届日本热物理性能研讨会论文集（1992年）。