Yuguang Chen, Xudong Jiang, Zhiheng Wang, Guang Xi
{"title":"进口导叶对超临界CO2离心式压缩机性能及内部流场的影响","authors":"Yuguang Chen, Xudong Jiang, Zhiheng Wang, Guang Xi","doi":"10.1016/j.supflu.2025.106708","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, an unsteady numerical simulation of supercritical carbon dioxide (SCO<sub>2</sub>) centrifugal compressors with inlet guide vanes (IGV) was conducted. First, using a condensable fluid model, the study validates the accuracy of property lookup tables generated by the FEK model against Lettieri’s SCO<sub>2</sub> Laval nozzle experimental data. Then, the internal flow fields under different IGV pre-swirl angles are analyzed. The results indicate that the IGV with zero pre-swirl angle induces minimal unsteady disturbances within the impeller, whereas the rotation of the impeller generates significant unsteady disturbances in the IGV. At a negative 30° pre-swirl angle, the compressor's peak efficiency decreases by approximately 5 %, accompanied by intense pressure pulsations and widespread phase transitions. Moreover, at a negative 30° pre-swirl angle, high-intensity pressure pulsations occur on the suction side of the IGV, triggering extensive phase transitions on both the suction side and at the outlet, covering the entire passage.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"225 ","pages":"Article 106708"},"PeriodicalIF":4.4000,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Impact of inlet guide vane on performance and internal flow field of a supercritical CO2 centrifugal compressor\",\"authors\":\"Yuguang Chen, Xudong Jiang, Zhiheng Wang, Guang Xi\",\"doi\":\"10.1016/j.supflu.2025.106708\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In this study, an unsteady numerical simulation of supercritical carbon dioxide (SCO<sub>2</sub>) centrifugal compressors with inlet guide vanes (IGV) was conducted. First, using a condensable fluid model, the study validates the accuracy of property lookup tables generated by the FEK model against Lettieri’s SCO<sub>2</sub> Laval nozzle experimental data. Then, the internal flow fields under different IGV pre-swirl angles are analyzed. The results indicate that the IGV with zero pre-swirl angle induces minimal unsteady disturbances within the impeller, whereas the rotation of the impeller generates significant unsteady disturbances in the IGV. At a negative 30° pre-swirl angle, the compressor's peak efficiency decreases by approximately 5 %, accompanied by intense pressure pulsations and widespread phase transitions. Moreover, at a negative 30° pre-swirl angle, high-intensity pressure pulsations occur on the suction side of the IGV, triggering extensive phase transitions on both the suction side and at the outlet, covering the entire passage.</div></div>\",\"PeriodicalId\":17078,\"journal\":{\"name\":\"Journal of Supercritical Fluids\",\"volume\":\"225 \",\"pages\":\"Article 106708\"},\"PeriodicalIF\":4.4000,\"publicationDate\":\"2025-06-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Supercritical Fluids\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0896844625001950\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Supercritical Fluids","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0896844625001950","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Impact of inlet guide vane on performance and internal flow field of a supercritical CO2 centrifugal compressor
In this study, an unsteady numerical simulation of supercritical carbon dioxide (SCO2) centrifugal compressors with inlet guide vanes (IGV) was conducted. First, using a condensable fluid model, the study validates the accuracy of property lookup tables generated by the FEK model against Lettieri’s SCO2 Laval nozzle experimental data. Then, the internal flow fields under different IGV pre-swirl angles are analyzed. The results indicate that the IGV with zero pre-swirl angle induces minimal unsteady disturbances within the impeller, whereas the rotation of the impeller generates significant unsteady disturbances in the IGV. At a negative 30° pre-swirl angle, the compressor's peak efficiency decreases by approximately 5 %, accompanied by intense pressure pulsations and widespread phase transitions. Moreover, at a negative 30° pre-swirl angle, high-intensity pressure pulsations occur on the suction side of the IGV, triggering extensive phase transitions on both the suction side and at the outlet, covering the entire passage.
期刊介绍:
The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics.
Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.