摘要
流量与压降的波动广泛存在于气液两相流中,并且会对设备造成严重的疲劳损伤甚至导致设备失效,因此降低气液两相流中的流量波动与压降差波动是有必要的。首先对中国古书《岭外外答》中记载的一种液压装置进行了理论分析,该装置主要功能是实现稳流效果,并且只有合适的压差才能使其正常工作;利用欧拉方程与伯努利方程对整个装置的流场与工作原理进行了系统的分析,在分析过程中考虑了流体不同流态(层流、湍流、气液两相流等)对模型的影响,并根据建好的模型应用FLUENT软件对流场进行了仿真模拟。在此装置基础上,论证通过对其管径比以及结构的进一步优化以及植入传感模块可设计出一种能应用到气液两相流的稳流装置。
Fluctuations of the flow and pressure drops exist widely in the two phase flow, which would cause the equipment to produce severe fatigue damage and even result in malfunction. Therefore, it is necessary to control the flow and pressure drops at appropriate range in two phase flow. This paper firstly models and analyzes a hydraulic element recorded in an ancient Chinese book ＂Ridge outside Pickup＂, the objective of which is to regulate the flow rate , only a specific pressure drop can the device release fluid flow out. A mathematical model based on Euler equation and Bernoulli equation [ 1 ] is proposed to analyze the fluid field distribution and the mechanism of the whole device, and the effect of different typical stream pattern （Laminar, Turbulent and Gas-liquid flows） have been fully considered. Numerical simulation is carried out to validate the analytical solution. By optimizing diameter ratio of the device and implanting sensor part, a new valve can be designed to solve the problem of the flow fluctuation in gas-liquid two phase flow.
出处
《机床与液压》
北大核心
2015年第12期21-27,共7页
Machine Tool & Hydraulics
基金
the innovation fund project of small and medium-sized enterprises ( No. 13C2621440518)
Enterprises and institutions entrusted to technical development project ( No. D8140840)
关键词
液压装置
岭外代答
阀
FLUENT
Hydraulic device, Ridge outside Pickup, Valve, Fluent
