光谱消光法测量高压湿蒸汽的研究  

Research on the Measurement of High Pressure Wet Steam by Spectral Light Extinction Method

作　　者：徐峰[1,2] 蔡小舒[1] 苏明旭[1] 任宽芳[3] Jean Marc Dorey 

机构地区：[1]上海理工大学颗粒与两相流测量技术研究所,上海200093 [2]达姆施塔特工业大学流体力学和空气动力学研究所,德国达姆施塔特64287 [3]法国国家科研中心与鲁昂大学空间热化学联合研究所,法国鲁昂76801 [4]法国国家电力公司流体力学、发电和环境研究与发展中心,法国夏都74801

出　　处：《动力工程》2009年第3期254-260,291,共8页Power Engineering

摘　　要：在前人工作的基础上发展了光谱消光法在线测量技术,并将其应用于高压湿蒸汽两相流湿度和水滴尺寸分布的测量.在数据处理上,提出了改进的optimized regularization反演算法,该算法比以往的Phillip-Twomey-NNLS算法有更大的抗噪性、准确性和稳定性.还进行了标准颗粒测量实验和高压湿蒸汽在线测量实验.结果表明:通过增大测量区与接收光纤间距和减小接收光纤面积,可大大降低颗粒前向散射光(包括低浓度时的不相关单散射光和高浓度时的复散射光)对消光光谱的影响,从而保证了在高浓度情况下湿蒸汽测量的准确性.湿蒸汽实验结果表明:在高压状态下湿蒸汽中的水滴尺寸比低压汽轮机内湿蒸汽中的水滴小,并且分布也较窄,这也是核电高压汽轮机水蚀较少的原因之一.The spectral light extinction method was developed and applied in wetness and droplet size distribution measurement of high pressure wet steam flow. In data processing, improved optimized regularization algorithm has more strong noise immunity, accuracy and stability than the traditional Philip- Twomey-NNLS algorithm. Experiments of standard particle sizing measurement and high pressure wet steam on-line measurement indicate that, by increasing the distance between the fibers and measuring area, and lessing cross section of detecting fiber, influences of forward scattering and multiple scattering on the extinction spectrum can be effectively decreased and the precision of measurement is ensured. Experiments of high pressure wet steam test show that the size of droplets in high pressure status is smaller than that in lower pressure status, and its distribution is more narrow, which is one of proof of less water erosion in high pressure nuclear power turbine.

关 键 词：核电汽轮机 高压湿蒸汽 光谱消光法 测量 高浓度 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]