CAJ | 학술논문

对于涡街流量计的旋涡发生体的仿真研究主要集中在形状和尺寸上，但在现场复杂工况环境的情况下，发生体的位置并不是固定不变的，会存在安装偏差。为了很好的分析发生体安装偏差带来的信号强度发生变化的问题，确定不影响信号强度的最大偏差角度，采用三角柱型发生体，在Ansys＋Workbench＋FLUENT 数值仿真软件平台环境下，根据涡街流量计的实际物理结构尺寸建立仿真模型，并对其进行网格划分、求解，将仿真得到的升、阻力频率相比较，得出阻力频率正好是升力频率的2倍，表明可以利用FLUENT软件对涡街流量计进行三维流场数值仿真。最后利用FL U EN T软件，通过改变管截面与截流面的夹角，在低、中、高速流速下，对其进行取压，将得到的信号强度和频谱分布进行比较分析，得出夹角与信号强度的关系：夹角在1°～7°范围，对信号强度的影响不大，超过7°以后影响变大。
대우와가류량계적선와발생체적방진연구주요집중재형상화척촌상，단재현장복잡공황배경적정황하，발생체적위치병불시고정불변적，회존재안장편차。위료흔호적분석발생체안장편차대래적신호강도발생변화적문제，학정불영향신호강도적최대편차각도，채용삼각주형발생체，재Ansys＋Workbench＋FLUENT 수치방진연건평태배경하，근거와가류량계적실제물리결구척촌건립방진모형，병대기진행망격화분、구해，장방진득도적승、조력빈솔상비교，득출조력빈솔정호시승력빈솔적2배，표명가이이용FLUENT연건대와가류량계진행삼유류장수치방진。최후이용FL U EN T연건，통과개변관절면여절류면적협각，재저、중、고속류속하，대기진행취압，장득도적신호강도화빈보분포진행비교분석，득출협각여신호강도적관계：협각재1°～7°범위，대신호강도적영향불대，초과7°이후영향변대。
At present ,the research of vortex shedder focused on shedder shape and size ,but in the field of complex environmental conditions ,the location of shedder is not fixed ,there will have a certain amount of error .For a good analysis of problems about changed signal strength with spectrum brought by misalignment of the vortex shedder ,the simulation model is built based on the actual physical vortex flowmeter size with the shape called triangular prism of vortex shedder by using Ansys+ Workbench+ FLUENT software .Then divided the simulation model into grids and get the result .After comparing the frequency of lift force with drag force ,concluded that the Resistance frequency is as twice as the Lift frequency . The simulator result shows that use FLUENT to numerical simulation is feasible . Compare and analysis the signal strength with spectrum distribution at low ,medium and high velocity by changing the angle between the surface of the pipe cross‐section and closure .Thus we obtains the relationship between the angle of the signal strength :The effect on the signal strength is small when angle in the range of 1 degree to 7 degrees ,and larger impact more than 7 degrees .