紊流

According to flow patterns screened during common pressure experiment . The key factors that affect flow and heat transfer of the gas -liquid -liquid tempestuously mixed jet is analyzed ,the paper present a way and basic idea to describe the flow and heat transfer of the jet .

研究此时的传热现象主要采用实验研究的方法，文中根据常压实验拍摄到的流型，分析影响此气-液-液相互混合大脉动紊流的传热及流动的关键因素，提出描述此时传热和流动过程的基本概念和方法。

Non-Newtonian fluid ; annular flow ; transcient flow ; turbulence.

非牛顿流体；环形空间流动；流态转换；紊流

The method in this paper is simpler than the velocity-pressure method of turbulent flow model.

本文方法较通常紊流模型及原参数解简便，为丁坝绕流数值模拟的一条新途径。

Velocity field inside of arciform greenhouse , fastigium greenhouse , parabola greenhouse and slanting crest greenhouse have been studied by numerical simulation of 3D turbulent flow.

本文对拱型、屋脊型、抛物型、斜顶型大棚这四种断面型式的大棚采用上述紊流模型，对其内部流场的流动进行了数值模拟。

M/s. The following dimensionless relationships were obtained: Sh=2+0.073Re〓Sc〓〓〓 The desulphurization process by powder injection and blowing in RH refining of molten steel and its mechanism have been considered and analyzed. Based on the tworesistance mass transfer theory and the mass balance of sulphur in the system, a kinetic model for the process has been developed. The related parameters of the model have been reasonably determined. Modeling and calculations for the process by injecting and blowing the lime based powder flux under the assumed operating modes in a RH degasser of 300t capacity have been carried out using the model.

考虑颗粒与液流的相对速度，RH—PTB条件下熔池传质特性可由下式表征： Sh=2+0.073Re〓Sc〓考虑紊流中脉动速度引起的能量耗散，RH—PTB条件下熔池传质过程服从如下关系：〓将粉剂颗粒与钢液间的传质当作刚性的气泡与钢液间的传质处理，对RH—PTB过程有：〓考察和分析了RH喷粉脱硫过程及机理，基于双重阻力传质理论和体系内硫的质量衡算，建立了RH喷粉脱硫过程的动力学模型，确定了模型各有关参数，包括各传质系数和脱硫处理过程中钢液内参与脱硫反应的粉剂量等。

The flow pattern and flow field in the energy dissipater in tunnel are simulated with the two-dimensional numerical model under different operating conditions.

通过比较各种追踪自由面的方法，选择了流体体积法来模拟自由水面，并与RNG k-ε紊流模型耦合建立了无压隧洞内消能工的水气二相流数学模型。

The highest heat transfer coefficient for air flowing in the nine 3-D IFT with staggered arrangement fins is No9 tube. In the turbulent region, the heat transfer coefficient of No9 tube is a factor of 10.36 compared with smooth tube, and its thermodynamic performance coefficient is as high as 6.49; The average Nusselt number in the most superior 3-D IFT with staggered arrangement can be increased by about 1.04 times in the laminar flow, and 6.38 times in the transitional flow as compared with that in the smooth tube. The friction factor between fluid and tube wall can be 0.96 times in laminar flow, and 12.68 times in transitional flow as compared with that inside the smooth tube.

在进行实验的九根肋叉排三维内肋管中，换热最强的No9管与光管相比，在紊流区的换热强化比平均可达10.36倍，阻力增大比约为4.06倍，其热力性能系数高达6.49；在过渡流区的换热强化比平均可达6.38倍，同时阻力增大比约12.68倍；在层流区的换热强化比为1.04倍，而阻力增大比仅约0.96倍。

Drip Irrigation line is used to produce single wing labyrinth water conveying belt on the base of .

生产线主要用于生产以聚烯烃为原料的具有紊流流态的单翼迷宫式输水带，广泛应用于大田、大棚沿作物植行铺设，果树、花卉、蔬菜等作物的灌溉。

Drip lrrigation line is used to puoduce single wing labyrinth water conveying belt on the base of .polyolefin .

生产线主要用于生产以聚烯烃为原料的具有紊流流态的单翼迷宫式输水带，广泛应用于大田、大棚沿作物植行辅设，果树，花卉，蔬菜等作物的灌溉。

Since the interface is treated as an internal flow field so it can accurately keep the conservation of flow variables on the sliding interface. Both laminar and turbulent unsteady rotor/stator interaction of a turbine stage with arbitrary pitch ratio are calculated successfully.

成功地计算了小雷诺数工况下具有任意栅距比的轴流动/静相干叶排内部非定常层流流动，及采用标准K-ε两方程模型对较大雷诺数工况下动/静相干轴流叶排内部非定常紊流流动进行了数值分析。

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。