腔体结构对射流陀螺分辨率影响的有限元分析  

Finite element analysis of chamber structure's influence on fluidic gyroscope performance

作　　者：张保丽[1] 朴林华[1] 梅传志[1] 

机构地区：[1]北京信息科技大学传感技术研究中心,北京100101

出　　处：《北京信息科技大学学报（自然科学版）》2012年第3期10-14,共5页Journal of Beijing Information Science and Technology University

基　　金：国家自然科学基金资助项目(60772012);新世纪优秀人才支持计划(NCET)资助项目;北京市重点实验室开放课题资助项目;北京市新世纪百千万人才工程培养资助项目;现代测控技术教育部重点实验室资助;北京市教委科技面上项目(KM201110772020);北京市自然科学基金项目(4122030)

摘　　要：对两种不同腔体结构射流陀螺敏感元件内的流场进行对比分析。采用有限元方法,利用ANSYS-FLOTRAN CFD软件,通过建模、划分网格、加载和求解等途径,计算了矩形结构腔体和流线型结构腔体射流陀螺敏感元件内的二维流场分布。计算结果表明:流线型腔体结构出口截面气流流速高于矩形腔体结构,为喷嘴处流速的28.87%,在一定程度上汇聚了气流;流线型腔体结构能减小腔体内的气流积聚,使循环通道内的气流更顺畅;流线型腔体内的流速梯度变化趋势大于矩形腔体,温度变化较大,其分辨率优于矩形腔体。In this paper, the airflow of two different chamber structures is analyzed contrastively in the sensitive element of fluidic gyroscopes. Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of fluidic gyroscope, meshing, loads applying and equation solving. The two dimensional airflow distributions of rectangle chamber and streamline chamber in sensitive element of fluidic gyroscope are calculated. The results show that the airflow velocity of the exit section in the streamline chamber which is 28.87% of the nozzle velocity is higher than that in the rectangle chamber structure, so the streamline chamber structure brings airflow together to a certain extent; it also reduces the airflow accumulation in the chamber and smoothes airflow within the loop channel; velocity gradient change in the streamline chamber is greater than that in the rectangle chamber, so the temperature changes greatly and the resolution of fluidic gyroscope is better than that with rectangle chamber.

关 键 词：腔体结构 有限元分析 流场分布 流速梯度 

分 类 号：TN379[电子电信—物理电子学] TN37