微型氦透平膨胀机系统性数值模拟

Systematic numerical simulation of micro helium turbine expander

现今氦透平膨胀机的设计,仅有面向各部件的设计方法及步骤,没有完整精准的设计流程,未形成设计体系。为保证环控系统中微型氦透平膨胀机运行的安全性、可靠性及高效性,提出一套基于CAD/CAE/CFD的智能化设计流程,通过一维热力计算、二维气动设计、三维气动分析和强度校核、三维造型和转子动力学分析对微型氦透平膨胀机进行数字化仿真设计,并对设计过程进行系统性数值模拟。确保设计方案可达到氦制冷系统的设计要求,同时为设计微型氦透平膨胀机提供设计制造集成技术。

For the design of helium turbine expander at present,there is neither complete,accurate design process,nor design system being formed,except the design method and step for each part.A smart digital design flow based on CAD/CAE/CFD is proposed to ensure safety,reliability and high efficiency in the operation of the micro helium turbine expander in the environment control system.Through the one-dimensional thermal calculation,two-dimensional aerodynamics design,three-dimensional aerodynamics analysis and strength check,three-dimensional modeling and rotor dynamics analysis,numerical simulation is carried out to design the micro helium turbine expander,and the design process is simulated systematically,to ensure that the design scheme can meet the design requirements of helium refrigeration system and provide the integrated technology for the design and manufacture of micro helium turbine expander.