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

IF 4.4 3区 工程技术 Q2 CHEMISTRY, PHYSICAL
Yuguang Chen, Xudong Jiang, Zhiheng Wang, Guang Xi
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引用次数: 0

摘要

本文对进口导叶的超临界二氧化碳(SCO2)离心压缩机进行了非定常数值模拟。首先,使用可冷凝流体模型,根据Lettieri的SCO2 Laval喷嘴实验数据验证了FEK模型生成的属性查找表的准确性。然后,分析了不同预旋角下的IGV内部流场。结果表明:零预旋角的IGV对叶轮内部的非定常扰动最小,而叶轮的旋转对IGV内部的非定常扰动较大;当预旋角为负30°时,压缩机的峰值效率下降了约5% %,并伴有强烈的压力脉动和广泛的相变。此外,当预旋角为负30°时,IGV吸力侧会出现高强度压力脉动,引发吸力侧和出口的广泛相变,覆盖整个通道。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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.
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来源期刊
Journal of Supercritical Fluids
Journal of Supercritical Fluids 工程技术-工程:化工
CiteScore
7.60
自引率
10.30%
发文量
236
审稿时长
56 days
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.
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