| 1. | Image tracking method based on fractal geometry edge extraction
基于分形几何边界提取的图像跟踪方法 |
| 2. | Geometric boundary condition
几何边界条件 |
| 3. | Numerical methods currently used cannot fit the complex geometry well because of the utility of rectangle and orthogonal curvilinear grids
但是，数值模型多采用矩形网格和正交曲线网格，对自然界复杂的几何边界适应能力较弱。 |
| 4. | Obtained numerical simulation results of flow fields include the resistance and efficiency performance , with the geometrical boundary completely according with the actual one and nothing being simplified . 2
在几何边界形状上严格反映物理真实而不作任何简化，获得了包括阻力特性和效率特性在内的计算结果； 2 |
| 5. | The numerical simulation of the inlet flow fields in the gas turbine . obtained numerical simulation results of flow fields include the uniformity , with the geometrical boundary completely according with the actual one and nothing being simplified
在几何边界形状上严格反映物理真实而不作任何简化，获得了整个进气系统地流场分布状况和压气机进口截面的不均匀度。 |
| 6. | The hybrid grid system consists of orthogonal bodyfitted curvilinear coordinate in horizontal dimension and cartesians coordinate in vertical dimension . two numerical computation examples were adapted to test the simulating method and simulated results were compared with experimental data
计算结果表明，对具有复杂几何边界的泵站前池水流，特别是前池中设置几何尺寸相对较小的底坎、导致墩等情况，方法非常适合。 |
| 7. | The effects of reynolds number , back surface of nozzle , aft - dome configuration and degree of submergence on aft - end internal flow were studied by both cold gas simulation and numerical simulation . it is showed that the separated flow is sensitive to the change of reynolds number and aft - end cavity configuration
最后，利用冷流模拟与数值模拟相结合的方法，研究了雷诺数、喷管背壁形状、后封头形状和潜入深度对燃烧室尾部流场的影响，结果表明流动的分离对雷诺数和背壁区几何边界的变化很敏感。 |
| 8. | The gap element method is proposed in the paper for two kinds of problems , which include contact problem and gap joint problem . elasticity contact problem falls into the category of unknown boundary value problems . it follows that the contact area and contact conditions or states ( st
文中给出了间隙元法在空间可动部件接触问题中的应用，推导了其几何边界条件和力学边界条件，利用虚功原理推导了含间隙元弹性接触问题的有限元方程式，给出了其数值解法的迭代步骤，并指出了利用间隙单元进行分析的特点。 |
| 9. | Abstract : three - dimensional , time - dependent , compressible fluid flow problems have been studied with the finite volume scheme based upon an arbitrary lagrangian - eulerian scheme . a general program for arbitrary mesh has been developed . this program can be used to the fluid flow with arbitrary shape boundary condition and moving boundary condition . as an example , the fluid flow in a simple tundish is calculated , and the time - dependent fluid flow distribution is given out
文摘:在欧拉与拉格朗日耦合的框架下，利用有限体积法对非定态三维可压缩流体流动问题给予研究，开发了一般网格下的通用计算程序.该程序适用于计算复杂几何边界条件、运动边界条件等情况下流体流动问题.作为例子，计算了简单中间包内流体的流动情况，给出了随时间变化的流场分布 |
