小流量高扬程低温液体泵的流动传热特性研究

项目名称： 小流量高扬程低温液体泵的流动传热特性研究

项目编号： No.51306172

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 能源与动力工程

项目作者： 王国平

作者单位： 中国科学院高能物理研究所

项目金额： 24万元

中文摘要： 为了更好的满足低温超导和冷中子源的要求，低温工质的循环驱动力一直不断的在提高，为此，低温液体离心泵被广泛应用于低温超导设备和冷中子源系统中，大大提高了超导设备和冷中子源的换热性能。本项目拟通过理论分析与实验测量相结合的方法来研究小流量高扬程低温液体循环泵的流动特性和传热机理，其学术思想在于通过确定各关键技术方案，为解决深低温温区低温离心泵研制中的科学问题奠定基础。拟通过考察离心泵叶轮在低温下的高速流动特性以及轴向传热机理，为低温液体泵（液氢泵、液氦泵）各重要部件选定合适的结构，明确支撑密封方式的选择，选定高效可行的绝热方式。在上述研究的基础上，拟搭建低温液氢循环泵测试实验台，并实验测量液氢泵的流动传热性能，以验证理论研究的可靠性。在此基础上定量解析低温液体循环泵的流动绝热结构，提出叶轮稳定性及失效的机理，是本研究的创新之处。

中文关键词： 低温；离心泵；循环驱动；流动特性；传热机理

英文摘要： In order to better meet the requirements of cryogenic superconductivity and cold neutron source, the recycling driving force of cryogenic fluid has been improved continuously. Therefore, cryogenic centrifugal pump is widely used in cryogenic superconducting devices and cold neutron source system, which greatly improved its heat transfer performance of those cryogenic equipments. This study intends to explore the fluid characteristic and heat transter mechanism for low flow rate and high head centrifugal pump, based on theoretical analysis and experimental measurements, in order to develop the critical technical proposals for cryogenic centrifugal pump, further on lay foundation for the development of cryogenic centrifugal pump. Proposed by investigating the fliud characteristic and heat transfer mechanism, to determine proper structures for important components of cryogenic liquid pump (such as liquid hydrogen pump, liquid helium pump), as well as confirm the sealing structure, and efficient and feasible thermal insulation approach. On the basis of the above research, this project proposed to set up an experimental platform, and then test the hydraulic and thermal dynamic performance of liquid hydrogen pump, to verify the reliability of theoretical research. The novelty of this research, lies in the quantitativ

英文关键词： cryogenic；centrifugal pump；circulation driving；flow characteristic；heat transfer mechanism