应用背景纹影技术的温度场测量  

Temperature Measurements Using the Background Oriented Schlieren Technique

作　　者：周昊[1] 吕小亮[1] 李清毅[1] 岑可法[1] 

机构地区：[1]能源清洁利用国家重点实验室(浙江大学),浙江省杭州市310027

出　　处：《中国电机工程学报》2011年第5期63-67,共5页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划(2009CB219802);浙江省自然科学基金资助项目(R107532);新世纪优秀人才支持计划(NCET-07-0761);全国优秀博士学位论文作者专项资金(200747);浙江大学曹光彪高科技发展基金资助(2008RC001)~~

摘　　要：为了重建温度场,通过试验获得存在温度场梯度分布的背景斑点图像和不存在温度场梯度分布的背景斑点图像,然后使用粒子图像处理软件对2幅图像进行互相关分析,求取背景粒子偏移量,即获得光线通过温度场以后在相机上的投影偏折角。将获取的任意切面偏折角数据进行迭代重建,求取这一切面的折射率分布,最后根据盖斯公式和气体状态方程进行求解,获得任意切面的温度场分布,将重建结果和谱线反转法测定的温度场进行比较,温度场分布符合实际情况。试验条件较为简单,迭代重建算法也极为成熟,具有广泛应用前景。This paper presents a simple way of reconstructing the temperature field. By using only a digital camera and a structured background, background oriented schlieren can get the light projection in one direction of the temperature field. The image was processed by particle image velocimetry software to obtain the deflection angle of light. Deflection angle of light passing over flame of Bunsen burner were used to reconstruct index of refraction field from algebraic reconstruction technology. Then the Gladstone-Dale relation and the Idea-Gas equation were used to obtain the temperature field. Comparing the temperature field with the results which were got by the sodium line-reversal method, this technology can get excellent Temperature field. Since it is very mature and the test conditions for it are simple, algebraic reconstruction technology has wide application prospects.

关 键 词：背景纹影技术 本生灯火焰 迭代重建法 折射率场 温度场 

分 类 号：TK113[动力工程及工程热物理—热能工程]