Maximum heat flux at wetting front and velocity of the front during quenching of high temperature material temperature material

高温料温材料淬火时润湿前沿最大热通量及前沿速度

• 批准号: 13650231
• 负责人: MONDE Masanori
• 金额: $ 2.24万
• 依托单位: Saga University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 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: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650231/
• 关键词: Wetting Front; Quench; Maximum heat flux; High temperature; inverse heat conduction problem; Laplace transformation

The cooling of high temperature material commonly appears in engineering field such as metal processing and safety management for loss of coolant in reactor. Heat transfer strongly depends on whether the surface is wetted or not and its values usually changes one hundred times. During quenching the high temperature material, in general, heat transfer process changes from film boiling to nucleate boiling through transition boiling. In this study, two-dimensional inverse solution is first developed using the Laplace transformation to estimate the surface temperature and heat flux. The newly developed inverse solution is numerically checked in application to the moving heat source and it is found for the solution to estimate the surface temperature and heat flux with almost the same accuracy of the measured temperature in solid and then to determine the location of the moving heat source.Experiment has been conducted to make characteristics of the wetting front velocity and heat transfer during the quench of high temperature copper, brass and steel with an impinging liquid jet. Experimental range is listed in table. By applying the inverse solution to this quench, the location at which the high temperature surface is wetted during quenching can be obtained and the maximum heat flux at this location can be obtained. The estimated location is compared with the measured position using high speed video camera, being in good agreement. The effect of liquid temperature, liquid velocity, thermal properties of material on the wetting front velocity and the maximum heat flux are made clear, experimentally.【table】

高温材料的冷却通常出现在金属加工和反应堆失冷剂安全管理等工程领域。传热在很大程度上取决于表面是否湿润，其值通常变化100次。在高温材料淬火过程中，一般传热过程通过过渡沸腾由膜沸腾变为核沸腾。在本研究中，首先利用拉普拉斯变换建立二维反解来估计地表温度和热流密度。对新提出的反解在移动热源中的应用进行了数值验证，发现该反解能以与固体中实测温度几乎相同的精度估计表面温度和热流密度，从而确定移动热源的位置。对高温铜、黄铜和钢的冲击射流淬火过程中的润湿锋速度和换热特性进行了实验研究。实验范围见表。通过对该淬火进行逆解，可以得到淬火过程中高温表面被润湿的位置，并得到该位置的最大热流密度。利用高速摄像机将估计位置与实测位置进行了比较，两者吻合较好。通过实验明确了液体温度、液体速度、材料热性能对润湿锋速度和最大热流密度的影响。

项目成果

門出政則, Jaffar Hammad, 有馬博史, 光武雄一: "ラプラス変換を用いた2次元非定常熱伝導の逆問題解の応用"日本機械学会論文集B編. 68巻・674. 2811-2817 (2002)

Masanori Kadode、Jaffar Hammad、Hiroshi Arima、Yuichi Mitsutake：“使用拉普拉斯变换解决二维非稳态热传导逆向问题的应用”日本机械工程师学会会刊 B，第 68 卷，674。2811-2817（2002 年） ）

Monde, M., Arima, H., Mitsutake, Y., Liu, W., and Hamma, J.: "Analytical method in two dimensional inverse heat conduction problem using Laplace transformation (Effect of measuring point number)"Trans. Of JSME. Vol.68, No. 672B. 2306-2312 (2002)

Monde, M.、Arima, H.、Mitsutake, Y.、Liu, W. 和 Hamma, J.：“使用拉普拉斯变换的二维逆热传导问题的分析方法（测量点数量的影响）”Trans。

Arima H., Monde M., Mitsutake Y.: "Estimation of Surface Temperature and Heat Flux using Inverse Solution for One Dimensional Heat Conduction"Thermal Science and Engineering. 10巻. 27-38 (2002)

Arima H.、Monde M.、Mitsutake Y.：“使用一维热传导的逆解来估计表面温度和热通量”热科学与工程，第 10 卷，27-38 (2002)。

Monde, M., Arima, H., Mitsutake, Y., Liu, W., and Hamma, J.: "Analytical method in two dimensional inverse heat conduction problem using Laplace transformation"Trans. Of JSME. Vol.68, No.666B. 473-480 (2002)

Monde, M.、Arima, H.、Mitsutake, Y.、Liu, W. 和 Hamma, J.：“使用拉普拉斯变换的二维逆热传导问题的分析方法”Trans。

Hammod J., Monde M., Mitsutake, Y. and Arima H.: "Determination of surface temperature and heat flux using inverse solution for two dimensional heat conduction"Thermal Science and Engineering. Vol.10, No.2. 17-26 (2002)

Hammod J.、Monde M.、Mitsutake, Y. 和 Arima H.：“使用二维热传导逆解确定表面温度和热通量”热科学与工程。