【摘要】 为提高燃烧环境下热辐射传输模拟计算的准确性以及可靠性,本文将统计窄谱带K分布模型(Statistical Narrow Band correlated-K,SNBCK)与热辐射传输求解计算的有限体积法(Finite Volume Method,FVM)相结合,建立起非灰燃气辐射传输计算模型;并以一个燃烧室火焰筒模型为研究对象,搭建了高温燃气风洞试验台,测量其在燃烧工况下的壁面辐射热流,将模拟得出壁面辐射热流与实验测量结果进行对比分析。研究结果发现本文计算的壁面辐射热流与实验结果的相对误差在-38.89%~32.54%之间,验证了本文计算的可靠性。且实验结果显示壁面辐射热流在总壁面热流中占的比重为10%~30%,在燃机设计过程中壁面辐射热流的影响不可忽视。更多还原

【Abstract】 In order to improve the calculation accuracy and reliability of radiative heat transfer in combustion conditions,the statistical narrow-band K distribution model was combined with finite volume method to establish the calculation model of non gray gas radiation transmission. A flame tube model was set as the research object to build a high temperature gas wind tunnel test rig,the wall radiative heat flux was measured in the work conduction,and was compared with the simulation results. The results show the relative error between the simulation wall heat flux and the experimental results is between-38. 89% and 32. 54%,the reliability of the calculation is verified. And the experimental results show that the radiation contribution in the total wall heat flux is about 10% ~ 30%,so the wall radiative heat flux can not be neglected in the design process of the gas turbine.更多还原