蒸汽射流直接接触凝结诱导振动特性研究  

Study on vibration induced by direct contact condensation of steam jet

作　　者：洪奥越 徐强[1] 蒋帅之 李翔宇 马小俊 郭烈锦[1] HONG Aoyue;XU Qiang;JIANG Shuaizhi;LI Xiangyu;MA Xiaojun;GUO Liejin(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《化工学报》2024年第8期2723-2733,F0001,共12页CIESC Journal

基　　金：国家自然科学基金项目(52488201,52076175)。

摘　　要：蒸汽射流在管内过冷水流中的直接接触凝结会诱导严重的管道振动。采用高速摄像机与加速度传感器,捕捉了蒸汽射流气羽演化及其诱导的管道振动。通过实验定量描述了考虑气羽形貌的气羽灰度质心振荡与管道振动特性。发现界面振荡流型下气羽灰度质心的振荡幅度最大,间歇振荡流型下次之,稳定凝结流型下最小。随着蒸汽质量流速升高,质心振荡及管道振动强度都向着趋于稳定的方向发展,表现出极强相关性。在此基础上绘制了管道振动强度随蒸汽质量流速及过冷水温度的分布图,振动强度随着过冷水温度的升高而升高。相关性分析表明气羽灰度质心的轴向振荡是沿蒸汽喷射方向的管道振动强度的主导因素。Direct contact condensation of the steam jet in the subcooled water flow inside the pipe can induce severe pipe vibrations.In this paper,a high-speed camera and an acceleration sensor were used to capture the evolution of the jet interface and the induced pipeline vibration.The characteristics of grayscale centroid oscillation considering steam jet plume morphology and pipeline vibration are quantitatively described.The oscillation amplitude of the grayscale centroid of the plume is the highest in the Oscil-I condensation regime,the lower in the chugging regime,and the lowest in the stable regime.The intensities of the centroid oscillation and pipeline vibration decline with increasing steam mass flux and a strong correlation is revealed.On this basis,the distribution diagram of pipeline vibration intensity with steam mass flux and subcooled water temperature is drawn,and the vibration intensity increases with the increase of subcooled water temperature.Correlation analysis quantitatively confirmed that the axial oscillation of the plume grayscale centroid is the dominant factor of the pipeline vibration along the steam injection direction.

关 键 词：蒸汽射流 直接接触凝结 灰度质心 振动特性 

分 类 号：O359[理学—流体力学]