Velocity Profile Measurement of Lead-Lithium Flows by High-Temperature Ultrasonic Doppler Velocimetry
Velocity Profile Measurement of Lead-Lithium Flows by High-Temperature Ultrasonic Doppler Velocimetry
复制标题
DOI：
10.13182/fst60-506
复制
发表时间：
2011-08
影响因子：
0.9
通讯作者：
Y. Ueki;M. Hirabayashi;T. Kunugi;K. Nagai;J. Saito;K. Ara;N. Morley
中科院分区：
文献类型：
--
作者：
Y. Ueki;M. Hirabayashi;T. Kunugi;K. Nagai;J. Saito;K. Ara;N. Morley
摘要本文介绍了一种高温超声多普勒测速技术（HT-UDV），该技术已成功地应用于测量铅锂共晶合金（PbLi）流动的速度分布。示踪粒子的影响进行了研究，以确定铅锂流的HT-UDV测量的要求。在惰性气氛中，由一个驱动盘驱动的PbLi流上对HT-UDV系统进行了测试。我们发现，需要足够量的熔融PbLi中所含的颗粒成功地测量PbLi的速度分布HT-UDV。进行X射线衍射分析以识别PbLi中的这些颗粒，并且表明这些颗粒由一氧化铅（PbO）制成。由于PbLi和PbO的比重彼此接近，因此预期PbO颗粒良好地分散在熔融PbLi的本体中。我们的结论是，优良的分散PbO颗粒使HT-UDV获得可靠的速度分布的操作时间约为12小时。
Abstract This paper describes a high-temperature ultrasonic Doppler Velocimetry (HT-UDV) technique that has been successfully applied to measure velocity profiles of the lead-lithium eutectic alloy (PbLi) flows. The impact of tracer particles is investigated to determine requirements for HT-UDV measurement of PbLi flows. The HT-UDV system is tested on a PbLi flow driven by a rotating-disk in an inert atmosphere. We find that a sufficient amount of particles contained in the molten PbLi are required to successfully measure PbLi velocity profiles by HT-UDV. An X-ray diffraction analysis is performed to identify those particles in PbLi, and indicates that those particles were made of the lead mono-oxide (PbO). Since the specific densities of PbLi and PbO are close to each other, the PbO particles are expected to be well-dispersed in the bulk of molten PbLi. We conclude that the excellent dispersion of PbO particles enables the HT-UDV to obtain reliable velocity profiles for operation times of around 12 hours.