【摘要】 脑积水分流器的压力质量检测需要在微流量微管道环境下进行,而压力传感器安装部位形成的突扩结构造成的局部压力损失会导致检测结果失真。文章在传统的管道突扩局部阻力系数公式基础上,进行微流量微管道环境下的突扩局部压力损失研究。通过CFD软件,建立微观尺寸的突扩圆管道,对突扩比及流速两个因素进行数值模拟分析,并设计正交试验,构建出微流量下微管道突扩结构局部压力损失与突扩比、流速的关系模型。所构建模型用于指导脑积水分流器压力质量检测的压力补偿。更多还原

【Abstract】 The pressure quality detection of hydrocephalus shunts needs to be carried out in a micro-flow micro-pipe environment, and the local pressure loss caused by the sudden expansion structure formed at the installation position of the pressure sensor will cause the detection result to be distorted. Based on the traditional local resistance coefficient formula of sudden expansion of pipelines, this paper conducts a study on the local pressure loss of sudden expansion in the environment of micro-flow micro channels. Through CFD, the micro-sized sudden expansion circular pipe was established, and the two factors of sudden expansion ratio and flow velocity were analyzed by finite element, and orthogonal experiment was designed to construct the local pressure loss and sudden expansion ratio of sudden expansion micro pipe under micro flow. The relationship model of the flow rate can be used for pressure compensation of hydrocephalus shunt pressure quality detection.更多还原