基于动压支撑的超小型泵液浮机理及运行可靠性研究

项目名称： 基于动压支撑的超小型泵液浮机理及运行可靠性研究

项目编号： No.51306018

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： 庄保堂

作者单位： 北京控制工程研究所

项目金额： 26万元

中文摘要： 基于动压支撑的超小型泵技术在航天领域有着广阔的应用前景，而该类泵的液浮机理及运行稳定性是流体机械领域的重要学术问题。本项目采用试验、数值模拟和理论分析相结合的方法，以揭示液浮薄膜承载特性对超小型泵运行稳定性影响的内在机理为目标，通过大量试验和数值计算，建立适合于超小型泵的动压液浮间隙流道优化设计方法；发展可应用于具有间隙的复杂流道和变动边界的混合网格技术，并应用于超小型泵全流道高精度DES模拟；结合液浮薄膜承载特性试验结果，深入分析影响超小型泵运行可靠性的因素和内在机理，建立基于动压支撑的超小型泵运行稳定性的评估方法及初步的设计指导原则。该研究不仅为动压支撑式超小型泵的可靠运行提供科学依据，研究的混合网格处理技术可为解决类似的科学问题提供实用性很强的手段，同时可为解决我国航天领域流体机械复杂系统的可靠性设计提供技术支撑，具有重要的学术价值和工程应用价值。

中文关键词： 超小型泵；动压支撑；优化设计；运行可靠性；

英文摘要： Ultra-small pump technology, whose liquid floating mechanism and operational stability being important academic problems in the field of fluid mechanics, has broad application prospects in aerospace. The present research uses a combination of tests, numerical simulation and theoretical analysis in an attempt to reveal the internal mechanism of the influence of liquid film's bearing characteristics on ultra-small pump's running stability. Through a large number of experiments and numerical calculations, an optimized design method for the gap fluid passage of ultra-small pump will be established. A hybrid grid technology applicable to complex fluid passages with gaps and changeable boundaries will be developed, which is also applicable to unsteady DES simulation. Based on experiments of liquid film's bearing characteristics and further analysis into elements and inner mechanisms that influence the operational reliability of ultra-small pumps, assessment method of operational reliability and preliminary design guidelines for ultra-small pumps supported by dynamic pressure will be established. This project will provide not only worthy support for the stable operation of ultra-small pumps supported by dynamic pressure, but also a practical means to solve similar scientific problems by the hybrid grid technology it de

英文关键词： ultra-samll pump；dynamic pressure suport；optimization；operational；