基于CFD的电液伺服阀衔铁组件啸叫研究

该文利用Gambit和Fluent对伺服阀衔铁组件的啸叫问题进行了CFD分析,模拟计算了产品内部油路结构的流固耦合,发现在伺服阀衔铁组件啸叫的时候,流体在产品内部的产生了一明显的狭长负压区,改变产品内部结构再次进行CFD的模拟计算,负压区消失,对该结构的产品进行实际的通压通液测试,伺服阀啸叫的问题得到解决。     

基于C编程和Gambit Journal的地形曲面生成技术

为了提高三维地形曲面生成的效率和正确率,减少手工操作的疲劳和错误,基于C语言编程与Gambit指令档(Journal)相结合的思路提出了一种高效率的地形曲面生成技术.在计算流体力学前处理器Gambit 中,对某方程所代表的地形曲面进行了基于该方法的生成演示和验证.研究表明,该地形曲面生成技术具有高效、错误率低和易于纠错...     

Computational investigation of flow parameters and efficiency of single and double inlet cyclone separators

Cyclone separators are one of the device used in power plant for long time; so many developments have been made in geometry, orientation and entry angle. In the present work an attempt is made with replacement of single inlet with double inlet. Computational analysis is done with Fluent 6.3.26 with Gambit 2.4.6 mesh generation using Cooper meshing facility. Eulerian–Lagrangian approach is adopted in the simulation with air as a working fluid and assumed to have continuous properties (Continuum). The collection efficiency of single and double inlet separator is studied using Lapple model, and it is found that there is an increase of 13.2% in collection efficiency for cyclone separator with double inlet. It is also found that higher inlet velocities are possible with double inlet separator without wall erosion when compared to single inlet separator.     

矿用卸载阀结构参数的优化研究

本文在AMESim平台上运用遗传算法优化原理,对卸载阀进行节能分析,降低了卸载阀卸载时的能量损耗。将AMESim优化结果导入到Fluent中进行流场分析,结果表明,增大主阀半锥角,使阀产生气穴的区域明显减小,同时也降低了阀口处的湍流强度。本文分析的结果对卸载阀新样机的设计具有一定的参考价值。