查询词典 heat flow

The mathematical model for two-phase flow and heat transfer of wet steam in exhaust pipe for a 600 MW power generating unit with direct air cooling is established.

建立了600 MW发电机组直接空冷排汽管道内湿蒸汽两相流动和传热的数学模型。

The paper introduces some researches, such as a new method to calculate the added mass for the seismic analysis of the fuel assembly in fast breeder reactor, simulation on the vortex shedding of double heat exchange tubes in a steam generator, simulation on the vortex shedding caused by the cross -flow over plates in a fuel assembly of an advanced reactor, the research on the impacting phenomenon of the free-surface on the vessel head in a storage tank as the main vessel of the China Experimental Fast Reactor shaken by the earthquake, and the researches on the solution of the liquid sloshing by moving particle semi-implicit and the scattering phenomenon caused by sloshing, and so on.

本文介绍华北电力大学在该方面的一些研究进展，例如，快堆燃料组件抗震分析新的流体附加质量计算方法研究；蒸汽发生器换热管双管漩涡脱落的数值模拟；一个先进堆燃料组件平行板上流动引起的漩涡脱落数值模拟；由地震引起的自由表面对快堆主容器冲击现象的研究；移动粒子法求解液面晃动及晃动引起离散现象的研究等。

Thus LES is proved to be suitable to simulate the flow and temperature fields of large scale vortices with complex geometric boundaries. LES cooperated with the second order full extension ETG finite element method is applied to simulate the forced convection heat transfer around two square cylinders arranged side by side. While the boundary conditions are symmetrical, the time history and power spectrums of drag coefficient, lift coefficient, averaged Nusselt number at the wall, and the streamwise velocity and temperature on the symmetrical points are calculated. The results show that the power spectrums are all almost symmetrical.

应用大涡模拟与二阶全展开ETG有限元离散格式相结合的方法对间距比为1.5的条件下横掠并列双方柱强制对流换热问题进行了数值模拟，通过边界条件对称时，对并列双方柱对称点上的速度和温度以及方柱的阻力系数、升力系数和壁面平均Nu数进行的时域分析和频域分析，得到了在对称边界条件下并列双方柱对称点上的速度和温度以及方柱的阻力系数、升力系数和壁面平均Nu数的功率谱均基本对称的结论。

In this paper, the numerical method for the problem of flow and heat transfer in rectangular narrow channel is researched.

本文对矩形窄缝内流动与换热的数值计算方法进行了研究。

According to the compare of some calculated values of key parameters with designed values, it is proved that the model has good precision and based on which, change process of steam flow, pipe inlet steam temperature and inner pipe steam temperature when pipe outside flue gas side heat exchange quantity changes are simulated.

根据模型的一些关键参数计算值与设计值的比较，证明了模型具有较好的精度。在此基础上，模拟了蒸汽流量、管子入口蒸汽温度和管外烟气侧换热量变化时管内蒸汽温度的变化过程。

Based on the general harmonic mean difference scheme, a program is coded for the flow and heat transfer in a porous media with three phases and two components. The developments of the temperature, pressure and the fluid saturation are computed.

利用文中提出的广义调和平均差分格式，建立了孔隙介质中三相两组分数值模拟程序，模拟计算了温度场、压力场和流体饱和度场的发展。

Compared with the general single-tube model, this paper takes the horizontal bundle absorber as the research object, analyses the principal of dual-solution two-phase flow heat and mass transfer in absorber, introduces the wetting ratio to describe the incomplete wetting performance and view it as the changeable parameter to explain it's influence to total performance of absorber and cooling capability of evaporator.

与以往广泛采用的单管模型相比，本文采用了实际中应用较多的水平管束式吸收器作为研究的对象，对吸收器内二元溶液两相流动传热传质机理做了深入细致的分析，引入了润湿率 WR 这一参数来衡量实际运行中出现的管壁的不完全润湿特性，并将其作为可变参数分析它对吸收器总体性能以及蒸发器制冷能力的影响。

In the research on flow and heat transfer of the diesel engine cooling system, the boundary condition is often difficult to be determined.

在研究柴油机冷却系统的流动和传热问题时，边界条件的确定往往成为难点。

And the self-circulation and boil heat exchange decide that the system is running at low pressure and flow rate.

而系统自循环和沸腾换热方式决定了它必然以低压力、低流量运行。

The result showed that it is the important principle for the design of the structure of heat exchanger and the work parameters to control flow velocity.

结果表明：在热交换器结构和工作参数的设计过程中，对工质流速的控制很重要。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。