SOLUTION METHOD OF INVERSE PROBLEM ON RADIATIVE・CONVECTIVE HEAT TRANSFER

辐射·对流传热反问题的求解方法

• 批准号: 07455090
• 负责人: KUDO Kazuhiko
• 金额: $ 2.43万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455090/
• 关键词: RADIATIVE HEAT TRANSFER; INVERSE PROBLEM; NUMERICAL ANALYSIS; MONTE CARLO METHOD; 物性値評価

1. A solution method is developed by utilizing the singular value decomposition to solve the inverse radiative load problems on combined radiative-convective-heat transfer problems. To show the validity of the method, the profile of heat load of each heater which is required to give uniform heat flux on a solid material set in a two-dimensional furnace is obtained.2. A solution method is also developed to solve the inverse radiative property value problems, in which, temperature and heat flux profiles along the solid walls surrounding the system and the gas temperature distribution in the system are given and the distribution of gas absorption coefficient in the system is calculated. In the method, forward problem of radiative heat transfer is solved by the Monte Carlo method at first by giving initial values of gas absorption coefficients, and wall heat flux distribution corresponding to the gas absorption coefficients is obtained from the temperatur distributions of gas and wall elem … More ents. Then, the tentative values of the absorption coefficients are corrected so as that the difference between the obtained and initially given profiles of wall heat flux become zero. By repeating these procedure, the distribution of absorption coefficient which corresponds to the initial conditions. For the convergence of the values of the absorption coefficients, the energy equations are pseudo-linearized for the absorption coefficients. To shorten the computation time required for the iterational calculation, the radiative energy exchange factors between calculational elements, the READ values, are divided into two parts, the absorption-coefficient-dependent part and the independent part, and the independent part which requires long computation time for its use of the Monte Carlo method is pushed out of the iterational loop. By combining these technique, the solution method to solve the inverse radiative property value problem is developed. The method is applied to a two-dimensional system, and the validity is proved. Less

1.提出了一种利用奇异值分解求解辐射-对流-换热组合问题的辐射负荷反问题的方法。为了验证该方法的有效性，得到了二维炉内固体物料均匀热流所需的各加热器的热负荷分布.给出了系统内气体温度分布、气体吸收系数分布以及系统周围固体壁面沿着的温度分布和热流密度分布。该方法首先通过给定气体吸收系数的初值，用MonteCarlo方法求解辐射换热正问题，然后由气体和壁面温度分布求出与气体吸收系数相对应的壁面热流分布， ...更多信息 ents。然后，对吸收系数的暂定值进行修正，使得到的壁面热流分布与初始给定的壁面热流分布之差为零。通过重复这些过程，得到了与初始条件相对应的吸收系数分布.为了使吸收系数的值收敛，对能量方程进行了伪线性化。为了缩短迭代计算所需的计算时间，将计算元件之间的辐射能量交换因子（READ值）分为吸收系数相关部分和独立部分，并将由于使用Monte Carlo方法而需要长计算时间的独立部分推出迭代循环。将这些技术结合起来，发展了辐射特性值反问题的求解方法。将该方法应用于一个二维系统，证明了该方法的有效性。少

项目成果

Kazuhiko Kudo: "Estimation of absorptioncoofficent dis Tribution in Two-dimensional gas volume by solving inversc radiative property value problem." Proc. 2nd Int. Symp. on Radiative Transfer. (to be pblished). (1997)

Kazuhiko Kudo：“通过解决逆辐射特性值问题来估计二维气体体积中的吸收系数分布。”

工藤一彦: "非灰色ガス噴流の放射・対流共存伝熱解析" 日本機械学会論文集 B編. 61. 2235-2240 (1995)

Kazuhiko Kudo：“非灰气体射流的辐射和对流传热分析”日本机械工程师学会汇刊，卷 B.61.2235-2240 (1995)

Kazuhiko Kudo: "Anelysis on inverse radialive property in two-dimensional systems" Proc. 1977 National Hcat Transfon Cont. (to be published). (1997)

Kazuhiko Kudo：“二维系统中逆径向性质的分析”Proc。