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水轮机水动力
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  “水轮机水动力”译为未确定词的双语例句
     On Study of the Calculation Methods for Hydrodynamic Performance of the Voith-Schneider and Kobold Rotor
     摆线式和蹼板式水轮机水动力性能计算方法研究
短句来源
     At last we used Borland C++ Builder program to design hydrodynamic performance program of vertical-axis variable-pitch turbine in order to help hydrodynamic performance calculation of the turbine in future.
     最后,使用Borland C++ Builder可视化程序开发环境对直叶水轮机的水动力性能计算程序进行可视化程序开发,为今后的水轮机水动力性能计算提供帮助。
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     Theoretical and Experimental Study on Hydrodynamic Performances of Vertical-Axis Tidal Turbine
     竖轴潮流水轮机水动力性能理论与实验研究
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     This article utilizes shape function and the Fluent console of CFD to provide an optimization method for aerofoil, and obtain the calculation by establishing the mathematical model, on the basis of analysis and generalization of the formulas of the hydrodynamic performance on vertical axis fixed-pitch straight blade water turbine for tidal current energy conversion.
     本文在分析和整理竖轴无偏角直叶水轮机水动力性能计算公式的基础上,运用形函数和Fluent平台,给出了一种水轮机叶片翼型优化方法,建立了数学模型,并得到了计算结果。
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     On Study of Hydrodynamic Performance of the Spring-Controlling of Vertical-axis Variable-Pitch Turbine
     弹簧控角竖轴直叶水轮机水动力性能研究
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     Hydrodynamics Analysis and Airfoil Optimization of Turbine's Blades
     水轮机叶片水动力分析及翼型优化
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     Hydredynamic loads;
     水动力荷载;
短句来源
     Research on the Hydrodynamic Characters of Unsteady Airfoils and Straight-bladed Turbines
     机翼非定常特性与直叶水轮机水动力性能分析
短句来源
     Countermeasuers for Turbine Erasion
     水轮机磨蚀对策
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     4.Hydrodynamic system.
     ④水动力系统;
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A fast reliable theoretical method was sought to predict the performance of the variable-pitch turbines for renewable tidal-current energy conversion. Four streamtube models(single-disk single-streamtube SDST, double-disk single-streamtube DDST, single-disk multi-streamtube SDMT and double-disk multi-streamtube DDMT)based on the momentum theory with the modification of the blade rotating effect were described and compared. The numerical results based on the present modified streamtube models were compared with...

A fast reliable theoretical method was sought to predict the performance of the variable-pitch turbines for renewable tidal-current energy conversion. Four streamtube models(single-disk single-streamtube SDST, double-disk single-streamtube DDST, single-disk multi-streamtube SDMT and double-disk multi-streamtube DDMT)based on the momentum theory with the modification of the blade rotating effect were described and compared. The numerical results based on the present modified streamtube models were compared with the experimental data, and it shows that all 4 models are able to predict the energy coefficients of the variable-pitch turbines at lower tip-speed ratios, but the double-disk models are better at higher tip-speed ratios. The double-disk multi-streamtube model is more fit for the performance optimal design and structure analysis in the straight blade variable-pitch turbines.

为寻求一种快速可靠地预报竖轴变攻角直叶片潮流/河流水轮机性能的方法,给出了计算变攻角直叶水轮机水动力性能的单盘面—单流管(SDST)、双盘面—单流管(DDST)、单盘面—多流管(SDMT)和双盘面—多流管(DDMT)模型公式以及叶片转动效应的修正方法.计算和试验比较表明:低速比情况下,这4种修正的流管模型均可有效预报变攻角水轮机的能量系数;在水轮机正常工作的较高速比情况下,单盘面模型误差大,而双盘面模型与试验吻合良好,DDMT模型具有预报水轮机性能和叶片受力的优势,适合于快速进行变攻角水轮机的水动力优化设计和结构分析.

An optimization method and mathematic model based on turbine hydrodynamics were presented to enhance the power coefficient of the vertical_axis straight_blade turbine for tidal streams energy conversion. The optimization parameter was selected as the changing rule of deflection angle versus azimuth angle and the optimization objective as the turbine power coefficient. The turbine hydrodynamic performance was solved by the multi_streamtube model based on the momentum theory. Calculating example was given with...

An optimization method and mathematic model based on turbine hydrodynamics were presented to enhance the power coefficient of the vertical_axis straight_blade turbine for tidal streams energy conversion. The optimization parameter was selected as the changing rule of deflection angle versus azimuth angle and the optimization objective as the turbine power coefficient. The turbine hydrodynamic performance was solved by the multi_streamtube model based on the momentum theory. Calculating example was given with the prototype of the vertical_axis cycloidal turbine. Such optimal results as the turbine power coefficient and the relation between attack angle and blade motion were given with particular analysis to explain the improved performance. The results show that the turbine power coefficient is enhanced by increasing the blade hydrodynamic angle of attack together with increased force acted on the blade and moment acted on the turbine axis.

水轮机水动力学原理出发,建立了提高竖轴变攻角潮流发电水轮机能量利用率的优化方法和数学模型.该模型以叶片偏角随位置角的变化规律为优化参数,以水轮机工作速比范围内的能量利用率系数为优化目标,采用基于动量定理的多流管模型来求解流体动力.选取竖轴直叶摆线式水轮机为优化原型进行了优化计算,给出了优化后水轮机的能量利用率以及攻角随位置角的变化规律.通过与不同偏心率的摆线式水轮机的能量利用率及攻角随位置角变化规律的对比,分析了优化后水轮机水动力性能改变的规律及原因.结果表明,在优化速比范围内,水轮机叶片不同位置角处的水动力攻角都有所增大,作用于叶片上的力以及叶片受力对水轮机中心的力矩也相应增大,从而提高了水轮机的能量利用率.

This paper describes and compares 4 streamtube models (single-disk single-streamtube, double-disk single-streamtube, single-disk multi-streamtube and double-disk multi-streamtube models) based on the momentum theory for the hydrodynamic performance prediction of the vertical-axis variable-pitch turbine that may be employed to tap tidal stream energy resources, especially for the prediction of the overall turbine power coefficient. All of these are for the designing of turbines used in tidal stream power plants....

This paper describes and compares 4 streamtube models (single-disk single-streamtube, double-disk single-streamtube, single-disk multi-streamtube and double-disk multi-streamtube models) based on the momentum theory for the hydrodynamic performance prediction of the vertical-axis variable-pitch turbine that may be employed to tap tidal stream energy resources, especially for the prediction of the overall turbine power coefficient. All of these are for the designing of turbines used in tidal stream power plants.

以潮流发电水轮机的设计为研究背景,分析和总结了基于动量定理方法的四种流管模型(单盘面-单流管模型、双盘面-单流管模型、单盘面-多流管模型和双盘面-多流管模型)在竖轴变攻角水轮机的水动力性能计算中的应用,特别是能量利用率预报方面的应用。说明基于动量定理的模型在求竖轴变攻角潮流发电水轮机的水动力性能方面,能够预报一些定性特性和总体趋势,为水轮机的设计和计算提供一种初步方法。

 
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