CAJ | 학술논문

通过建立工业管式裂解炉模型，结合辐射图像处理方法，开展了管式炉炉内热物理量场反演模拟研究。针对管式炉内复杂边界条件下的辐射传递方程求解问题，在蒙特卡洛方法中加入多尺度网格及能束步进求解策略，实现了炉管、火焰和炉壁辐射的解耦计算。模拟研究结果表明，较小的测量误差条件下温度场重建误差小于4%，最大偏差小于30,K，并且能够实现对每根炉管表面温度的准确重建。该项研究将为提高管式炉安全监视和热力过程控制水平提供参考。
통과건립공업관식렬해로모형，결합복사도상처리방법，개전료관식로로내열물리량장반연모의연구。침대관식로내복잡변계조건하적복사전체방정구해문제，재몽특잡락방법중가입다척도망격급능속보진구해책략，실현료로관、화염화로벽복사적해우계산。모의연구결과표명，교소적측량오차조건하온도장중건오차소우4%，최대편차소우30,K，병차능구실현대매근로관표면온도적준학중건。해항연구장위제고관식로안전감시화열력과정공제수평제공삼고。
Thermal physical distribution inversion,an invese radiation problem,was studied numerically in an in-dustrial tubular cracking furnace by the radiation image processing method. Sixteen CCD cameras were mounted on the wall in order to capture the boundary radiation intensity,which was determined by radiation imaging model whose essence was radiative transfer equation. In order to solve the radiative heat transfer equation with complex boundary condition in the tubular furnace,multiscale grid and energy beam stepper solving strategy were combined with Monte Carlo method,and a revised Tikhonov regularization method was adopted to deal with the morbid equa-tion,thus the radiations from tubes,flame and furnace wall were decoupled and the radiative transfer processes of each pipe were quantified. Simulation results indicated that the temperature reconstruction error was less than 4%and the maximum deviation was within 30,K under small measurement error conditions,and that the surface temperature of each pipe could be deduced accurately. However the reconstruction results were not credible when the measurement error increased to 5%. The inversion based on radiation image processing would make it possible to online visualize thermal physical distribution,and this study would have an important application value for improving the safety monitoring and thermal process control in tubular furnace.