流体力学

The paper first report the status of gas flow in the chamber channels during the sublimation which was discriminated as viscus flow. The digital solution of the gas flow and heat transfer in the chamber channel was gotten by using CFX4. 0 software.

本文首次对冻干升华过程中冻干箱内通道里的气体流动状态判定为粘滞流，并用流体力学计算软件CFX4.0对冻干箱通道内的流动和传热进行了数值求解，给出了通道内气体流动的流线图和温度场图。

Two-phase flow in a preheater cyclone with three core volute structure was simulated by CFD software in this paper.

本文借助流体力学软件FLUENT，对新型干法水泥回转窑普遍采用的三心大蜗壳式旋风预热器旋风筒单体，模拟计算了其内部的气固两相流运动行为。

By using the continuity equation and weak hydrody-namic interaction theory in the relaxation time approximation, the spatial variation of the radar scattering cross-sec-tion has been proved as proportional to the gradient of current velocity.

在浅海海流速度垂直分布廓线为均匀的假定下，由流体连续性方程和弛豫时间近似下流体力学弱相互作用的理论，已证明雷达散射截面的空间变化正比于海流方向上海流速度变化的梯度。

In many CFD computations, no-slip boundary conditions are imposed on the velocity field. On these boundaries, the fluid velocity vector is zero.

在许多计算流体力学计算中，存在非滑移边界，这种边界上流体的速度为0。

In order to research the mechanism and effect of hydrodynamic cavitational enhancement, find the basic rule which affected it. The work has been carried out as following.First, an effective equipment of hydrodynamic cavitition is built. Second, we find a new method to capture the free radicals, which is used to measure the amount of hydroxyl. And its correlation with the intensity of cavitation has been studied aims at analyzing the effect of various factors on the yield of hydroxyl, achieving the optimum hydrodynamic cavitation conditions. Then, hydrodynamic cavitation is used to the degradation of organic wastewaters containing rhodamine B, and sterilization of biologic wastewaters containing enterobacter aerogenes. Finally, numerical simulation based on computer fluid dynamic has been made for verifying the effect of hydrodynamic cavitation theoretically.

为了探求水力空化强化效应的机制和效果，寻求影响空化强化效应的基本规律，本论文就此开展了如下研究工作：设计建立实用有效的水力空化实验装置；建立空化自由基捕捉新方法，并以此定量检测水力空化羟自由基，研究空化羟自由基产量与空化强度的关系，研究各种因素对空化自由基产量的影响，以寻求最佳空化强化条件；在此基础上，进行了水力空化对含罗丹明B有机废水降解处理、对含产气肠杆菌生物污水杀菌处理研究，实验检验水力空化的强化效果；根据计算流体力学理论对空化流场进行数值模拟，从理论上验证水力空化的发生效果。

By using CFD method, it was available to get not only the distribution of pressure, velocity and eddy air, but also the aerostatic force coefficients of a box girder section.

用计算流体力学方法模拟了桥梁跨中断面周围的风场特征，不仅能得到流场的压力、速度和涡旋的分布，还提取了箱梁断面的三分力系数。

The parameter acceleration is also affinitive with hydrodynamics in flows.

激光的广泛应用已经扩展到流体力学领域，如激光多普勒测流速，而加速度的量也与流体的动力学过程密切相关。

Alumite LF6; fluid mechanics ; hydro-mechanic al deep drawing ; finite element simulation ; cylindrical cups

防锈铝LF6；流体力学；充液拉深；数值模拟；筒形件

Harbin 150001, China）Abstract: Based on the mould features, the fluid mechanics models were founded. Integrating with the finite element method, the hydro-mechanical deep drawing of alumite LF6 was simulated. The alumite LF6 was formed by hydro-mechanical deep drawing, and the reasonable process parameters were obtained.

摘 要：根据模具几何特征，通过建立流体力学模型描述液体对板料单元的动态影响，结合有限元数值模拟技术对塑性差、难成形材料防锈铝LF6的充液拉深进行数值模拟，并进行实验研究，得到了防锈铝充液拉深合理工艺参数。

Based on the mould features, the fluid mechanics mode ls were founded. Integrating with the finite element method, the hydro-mechanical deep drawing of alumite LF6 was simulated. The alumite LF6 was formed by hydro -mechanical deep drawing, and the reasonable process parameters were obtained.

根据模具几何特征，通过建立流体力学模型描述液体对板料单元的动态影响，结合有限元数值模拟技术对塑性差、难成形材料防锈铝LF6的充液拉深进行数值模拟，并进行实验研究，得到了防锈铝充液拉深合理工艺参数。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。