The Enhancement of SIMPLE Method

本文针对SIMPlE系列算法中的弊端，提出了一种新的计算压力场的算法———SIMPlEHl算法，且将这种算法应用到液压阀阀腔的数值解中，发现SIMPlEHl算法具有计算精度高，收敛速度快等优点In the light of deFects of SIMPLE series methods, a new SIMPLEHL method For solving the pressure profile is put Forward.It has been Found that the SIMPLEHL method has an advantage of high computation precision and acceleration convergence, etc., when the SIMPLEHL method was used in the digital simulation of the hydraulic valve chamber

A Study of the Flow Field Distribution of Hydraulic Integrated Block by Using LDA and K-ε Model

液压元件集成化后，从流场分布的机理研究液压阀的节能显特别重要。通常情况下，液压阀流道的公称直径（6MM~20MM）比较小，故采用传统的测量仪器不可能测量出流场的分布.本文利用激光多谱勒测速仪（ldA）成功地解决了这个问题；另一方面，传统的研究方法只能研究总的能量损失，要从流场分布的机理研究流道内的能量损失，也是非常困难的.作者利用本文的k-ε紊流模型成功地解决了这个问题.从实验数据和数值模拟两个方面提出了优化流道的设计方案。在计算复杂流场时，作者提出了一种对复杂流场计算收敛性非常有效的线性分割迭加法（lSA）。It is very important to study the energy saving From the mechanism of the Flow Fields of the distribution,when the hydraulic components are integrated.In the ordinary condition, a conventional measurement equipments are not able to measure the FlowField's distribution,because the nominal diameters(6 mm～20 mm)of the Flow pathof hydraulic components are very small.The authors have successFully solved the problem by using Laser Doppler Anemometry(LDA).On the other hand,it is very diFFicultto analyse theoretically it,the conventional method is only capable of studying the total ensrgy loss,alld can not analyse the Flow Fields distribution.Also it is reay diFFicult to study the Flow Field'S distribution mechanism of the Flow path.The authors have alsosuccessFully solved the problem by using K--E turbulence'model.Finally an optimal design project of the Flow path is proposed by the experimental data and theoretical analysis.In the paper,the authors have achieved a good method to simulate the complex FlowFields which is called' Linear-Separation-Accumulation(L method

Study on the Hybrid Formal DiFFerence Method

本文主要研究了高阶差分和低阶差分的不足，从而提出了一种新型的混合差分法，这种方法比高低阶差分都优越In the light of deFects of the high order diFFerence and low order diFFerence,a new type of hybrid diFFerence method is put Forward in this paper.The method has advantage over the high order diFFerence method and low order diFFerence method