水轮机

It is an active subject to research software and hardware realization of turbine speed governor.

对水轮机调速器的软硬件实现及控制策略的研究具有重要意义。

So it is significant to enhance the Francis turbines hydraulic performance and stability.

因此，提高水轮机的水力性能和工作稳定性具有十分重要的现实意义。

It adopts Reynolds time-average N-S equation and k-s turbulence model to calculate the inner 3-D viscid turbulence flow of hydraulic turbine. In the unstructured grid, the governing equations are discredited with Finite Volume Method based on Finite Element Method. And the pressure correction method is proposed in numerical calculations.

然后采用基于雷诺时均N-S方程与标准k-ε湍流模型来计算水轮机三维粘性湍流场，在非结构化网格中，采用基于有限元的有限体积法对方程进行离散，用压力校正法进行数值求解。

Optimization system of reaction turbine runner based on numerical simulation of 3D viscous flow is established.

本文建立了一套基于三维粘性流数值分析的反击式水轮机转轮水力性能的优化方法。

So, it is indispensable to investigate thoroughly the three dimensional viscous flow through the turbine.

为此，对水轮机内部流动状况进行三维粘性流动数值解析是非常必要的。

Moreover,it is simple in technological operation.The paper introduces in detail the application of thermal spraying to equipment renovation in electric power industry,for example,fan blade,cylinder plane,water tur...

为此，详细介绍了热喷涂技术在电力行业中的风机、汽缸平面、水轮机叶片等设备修复中的具体应用，指出热喷涂技术在电力行业中具有重要意义和广阔的发展前景。

The assembling, actuating, water-tight test of pump-turbine globe valve and its quality control are introduced.

介绍了抽水蓄能水轮机球阀装配、动作及密封漏水试验工艺性与质量控制。

For surfacing welding the parts of water-wheel machine been corroded and destroyed,the product made high-manganese which need have great wear out resisting and toughness.

JIS DF-ME HRC≥20 用于堆焊水轮机受气腐蚀破坏零件和要求耐磨性及韧性高的高锰钢制作的堆焊。

The deficiency in the some localities of the big plane of the interior-lid and the difference in composite effect in columned surface are the main reasons leading to interior-lid invalid.

本文在对渣浆泵、原矿输送管、水轮机叶轮等零件的服役条件分析的基础上，针对磨损只在材料表面发生、整体复合材料成本高、回用困难等特点

On the basis of the fjeld testing res...

这些试验结果与理论分析结果，给进一步深入研究水轮机过渡过程以及与之相关的工程实际问题，提供了重要的依据。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。