密度波不稳定性的理论分析研究  

Research on Theoretical Analysis of Density Wave Instability

作　　者：邢明迪 XING Mingdi(China Institute of Atomic Energy,Beijing,102413 China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《科技资讯》2023年第7期205-208,222,共5页Science & Technology Information

摘　　要：在两相流动系统中都有可能发生流动不稳定性,进而会导致机械振动和系统部件故障,影响了系统的安全。因此,了解流动不稳定性对于任何两相系统的设计、控制和性能预测都具有重要的意义。该文采用均相流模型线性频率模型开发了一套分析并联通道流动不稳定性的数值模型,并采用国外相关实验结果进行对比,通过此数值模型来分析参数对系统不稳定性的影响规律。该文研究的参数包括通道长度、进出口节流限制、入口速度。模型比对结果表明,建立的模型与国内外数据结果符合较好;参数研究结果表明,当增加通道长度、通道长度会使系统趋于不稳定,而增加入口节流限制、入口速度会使系统更加稳定。In two-phase flow systems,flow instability can occur,and then lead to mechanical vibration and system component failures,which can affect system safety,so understanding the flow instability is of great significance for the design,control and performance prediction of any two-phase system.This paper adopts the linear frequency model of the homogeneous flow model to develop a set of numerical model to analyze the flow instability in parallel channels,and compares relevant experimental results from foreign countries,and analyzes the influence of parameters on the system instability through this numerical model.Parameters studied in this paper include the channel length,inlet and outlet throttling restrictions and inlet speed.The model comparison results show that the established model is in good agreement with the domestic and foreign data results.The parameter research results show that the channel length will make the system unstable when the channel length is increased,and increasing the inlet throttle limit and inlet speed will make the system more stable.

关 键 词：并联通道 密度波振荡 频域方法 均相流模型 

分 类 号：TL67[核科学技术—核技术及应用]