基于CFD的非全周开口滑阀流场仿真分析

发布时间：2018-11-01 19:17

【摘要】：近些年，随着计算机科学技术的发展以及计算流体力学理论的丰富，人们借助CFD技术对液压阀复杂的内部流场进行数值模拟和可视化分析，成为液压领域新的研究热点。节流槽滑阀又称为非全周开口滑阀，，其阀口具有水力半径大，抗阻塞的特点，流量调节范围大，容易得到较小的稳定流量，在液压比例阀和伺服阀中得到了广泛应用，节流槽滑阀的特性分析对液压阀的性能提升起着很重要的作用。本文借助CFD软件对节流槽滑阀内部流场进行数值模拟和可视化研究。在相同的计算条件下，分别对不同开口度的三维稳态模型进行模拟仿真，通过模拟仿真得到了阀内流场的速度和压力分布情况，阀口流量特性以及液动力特性，然后经过分析得出了阀内流场的速度压力、阀口流量特性以及液动力特性随阀口开度以及压差的变化情况，对阀的性能研究和结构优化具有指导性意义。
[Abstract]:In recent years, with the development of computer science and technology and the rich theory of computational fluid dynamics, the numerical simulation and visual analysis of complex internal flow field of hydraulic valve with CFD technology has become a new research hotspot in hydraulic field. Throttling groove slide valve, also known as partial circumferential open slide valve, is widely used in hydraulic proportional valve and servo valve because of its characteristics of large hydraulic radius, anti-blocking, wide flow regulation range and easy to obtain small stable flow rate. The characteristic analysis of throttle slide valve plays an important role in improving the performance of hydraulic valve. In this paper, CFD software is used to simulate and visualize the flow field inside the throttle valve. Under the same calculation conditions, the three dimensional steady state models with different openings are simulated, and the velocity and pressure distribution of the flow field in the valve, the flow characteristics of the valve outlet and the hydrodynamic characteristics are obtained by simulation. Then, the velocity and pressure of the flow field in the valve, the flow characteristics of the valve outlet and the variation of the hydraulic dynamic characteristics with the opening of the valve and the pressure difference are obtained, which is instructive to the study of the valve performance and the optimization of the structure.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.52

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