CAJ | 학술논문

采用能量平衡方程和离散坐标法近似地建立了金属热防护系统多层隔热材料的一维稳态传热的数学模型,并利用遗传算法和纤维隔热材料的有效导热系数试验数据求解传热反问题,从而得到了模型中的纤维隔热材料的辐射衰减系数、反照率和隔热屏表面辐射发射系数.最后,由实验测得了多层隔热材料的有效导热系数,验证了采用优化参数后,多层隔热材料的传热模型的正确性.
채용능량평형방정화리산좌표법근사지건립료금속열방호계통다층격열재료적일유은태전열적수학모형,병이용유전산법화섬유격열재료적유효도열계수시험수거구해전열반문제,종이득도료모형중적섬유격열재료적복사쇠감계수、반조솔화격열병표면복사발사계수.최후,유실험측득료다층격열재료적유효도열계수,험증료채용우화삼수후,다층격열재료적전열모형적정학성.
The energy equilibrium equation and discrete ordinate methods are combined to establish the one-dimensional steady heat transfer mathematical model of multi-layer thermal insulations (MTIs) in metallic thermal protection systems. The inverse problem of heat transfer is solved by the genetic algorithm and data from the steady heat transfer experiment of fibrous thermal insulations. The density radiation attenuation coefficient, the albedo of fibrous thermal insulations and the surface emissivity of reflective screens are optimized. Finally, the one-dimensional steady heat transfer model of MTIs with optimized thermal physical parameters is verified by experimental data of the effective MTI conductivity.