非数值计算

Numerical simulation of the unsteady flow in a transonic turbine stage is still a hard work for CFD researcher.

涡轮级内的非定常流场数值模拟是现阶段计算流体力学研究的重要领域，也是研究的难点。

The present work is mainly focused on developing airfoils numerical simulation methods for steady and unsteady transonic flow.

本文主要发展了计算翼型跨音速定常及非定常粘性绕流的数值模拟方法。

So, the correct prediction of the blade flutter is very important in the design and modification of the turbomachine.

本文运用计算流体力学方法，成功地进行了二维和三维振动叶栅非定常粘性流动数值模拟。

The distance of coded points or uncoded points was calculated with several groups of photographs taken by a camera with software XJTUDP, and then their average value was acquired.

通过相机拍摄多组照片，在XJTUDP软件下计算相同条件的编码点或非编码点之间的距离，得出其平均值，将测得的每组单个数值减去平均值，可获得每次测量的个体误差。

This paper has mainly analysedvertical oblique flow circulating pump operation properties. Through monistic flowdesign theory, carried out preliminarily design for impeller, and completedthree-dimensional model analysis through CAD software. With the aid of CFD-FLUENTsoftware platform, have carried out value for flowing imitation in pump, the SIMPLECmethod on unstructural grid has realized pressure the couple of speed, which verified theresult of preliminary design.

本文主要分析了立式斜流循环水泵运行特性，通过一元流设计理论，对叶轮进行初步设计，并通过 CAD 软件进行立体三维模型分析，借助 CFD-FLUENT 软件平台，对水泵内流场进行了数值模拟，利用非结构网格上的 SIMPLEC 方法实现压力-速度的耦合，对初步设计进行计算结果的验证。

Wheneer possible, we recalculated these alues from published histograms instead of relying on numbers proided in the text.

每当可能的，我们都利用公布的直方图重新计算数值，而非仰赖文献中提供的数字。

The transonic flutter characteristics are investigated for several wings, empennage and wing-body configuration, flutter critical speeds are numerically simulated.

以ONERA M6机翼和无后掠矩形机翼为算例，分别对它们的跨音速定常和非定常粘性绕流进行了数值模拟，计算结果和有关文献的结果进行了比较，吻合较好。

In introducing the basic conceptions of the direct variable method and the dimensionless method, the developing laminar flow with the gravity in plane were solved. Meanwhile, these problems were also calculated in structured meshes and unstructured meshes for numerical solutions.

在介绍直接变量方法与无量纲方法基本概念的基础上，求解有重力作用下的平板流动的各种情况，并在结构化网格与非结构化网格两套程序中进行数值解的计算。

Since the initial start of buried pipelines results in three-dimen-sional unstable heat transmission , and at initial start the temperature change of the soil around a pipeline is affected by the temperature inside the pipeline and the ground surface temperature annual fluctuation, the differential equation for heat transmission and the boundary value may be line...

埋地输油管道启输过程是三维非稳定传热问题，启输过程中管周土壤温度场的变化受管内热水温度和启输前地表面温度年波幅的影响，可将传热微分方程和边值条件线性组合成两个定解问题，用电子计算机进行数值求解，得出计算公式，以确定预热阶段管路任一点任一时刻的热水介质温度。

Thirdly, the thesis paid close attention to the isochrones of pore water pressure in the engineering cases of slope under the conditions different rates of change water level and raining by using numerical simulation on the basis of saturated-unsaturated theory. From the result, the change of groundwater and water level in front of slope is not synchronized .

结合工程实例，采用数值模拟，结合非稳定饱和-非饱和渗流理论，重点探讨坡前水位按不同速率变化及强降雨情况下，坡体内渗流场的时空分布特征，从计算结果得出，水位在上升或下降期，坡体内地下水位变化与坡前水位变化速率不同步，表明坡体内地下水位变化有明显的滞后特点。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。