机电工程技术2025，Vol.54Issue(5)：108-112,5.DOI:10.3969/j.issn.1009-9492.2025.05.019
超临界二氧化碳离心压缩机内部流场数值模拟
Numerical Simulation of Internal Flow Field in Supercritical Carbon Dioxide Centrifugal Compressor
于绍轩 1赵海峰1
作者信息
- 1. 沈阳工业大学化工装备学院,辽宁 辽阳 111000
- 折叠
摘要
Abstract
In a supercritical carbon dioxide(SCO2)Brayton cycle,the centrifugal compressor operates near the critical point of CO2.Its internal flow field differs significantly from that of traditional air compressors,necessitating thorough research.Based on the geometric parameters of the Sandia SCO2 Brayton cycle main compressor,a three-dimensional geometric model is established,and numerical simulation methods are used to conduct a simulated study of the internal flow field of the SCO2 centrifugal compressor.The impact of CO2 property table resolution is explored on calculation results,the accuracy of numerical methods is validated,and post-processing analysis of several special flow phenomena is conducted in the internal flow field of the compressor.The results indicate that using a CO2 property table with a range of 4～40 MPa and 270～470 K,and resolution of 200×200,can simultaneously balance calculation accuracy and cost.The performance curve of numerical simulation aligns with the trend of the experimental performance curve.Post-processing of the flow field reveals phenomena such as phase change of the working fluid,flow separation at the trailing edge,and secondary flow at the blade tip clearance within the Sandia impeller.These analyses provide valuable insights for the study of SCO2 centrifugal compressor.关键词
超临界二氧化碳/离心压缩机/流场/数值模拟Key words
supercritical carbon dioxide/centrifugal compressor/flow field/numerical simulation分类
机械制造引用本文复制引用
于绍轩,赵海峰..超临界二氧化碳离心压缩机内部流场数值模拟[J].机电工程技术,2025,54(5):108-112,5.
