基于自由火焰图像的三维温度场重建方法研究

Reconstruction of Three-dimensional Temperature Distribution Based on Free Flame Images

自由火焰图像误差对逆向Monte Carlo三维温度场重建方法算法性能有较大的影响。为减小误差的影响,将空间滤波器和时间滤波器结合的方法对重建算法所采用的自由火焰图像进行了预处理。实验研究表明,对自由火焰图像进行预处理之后,对逆向Monte Carlo方法重建温度场的低温区域产生较大影响。再通过与热电偶温度计实测数据比较分析,逆向Monte Carlo重建方法经该预处理方法改进后,在火焰中心区域重建温度的误差可减小近50K。

The errors in the free flame images have much influence on the performance of backward Monte Carlo 3D temperature field reconstruction algorithm.To eliminate their influence,this paper proposes to pre-process the free flame images with a space fitter and a time fitter before the temperature fietd reconstruction.The experimental results show that the proposed pre- processing has much effect on the backward Monte Carlo 3D temperature reconstruction on the field where is near the low temperature center of the flame,