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非定常性能
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  unsteady performance
     Prediction of Unsteady Performance of Propeller by Surface Panel Method
     螺旋桨非定常性能的面元法预报
短句来源
     Prediction of unsteady performance of propeller by potential based panel method
     螺旋桨非定常性能预估的面元法
短句来源
     Prediction of Unsteady Performance of Ducted Propellers
     导管螺旋桨的非定常性能预估
短句来源
     This paper has adopted the low-order surface panel method based on velocity potential to predict the unsteady performance of propeller.
     本文采用基于速度势的低阶面元法进行螺旋桨非定常性能的预报。
短句来源
     The research has built the certain foundation for the predict the unsteady performance of the contra-rotating propeller, and have the certain practical significance to prediction of other special propellers.
     本论文的研究为预报对转螺旋桨的非定常性能打下了一定的基础,对计算其他特种推进器有一定的实际意义。
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  “非定常性能”译为未确定词的双语例句
     Prediction of Unsteady Propeller Performance by Discrete Vortex Lattice Method
     用离散涡环法预报螺旋桨非定常性能
短句来源
     A Prediction of Unsteady Propeller Performance with Numerical Lifting-surface Theory
     螺旋桨非定常性能计算的升力面方法
短句来源
     The lifting-line and lifting-surface design method , the harmonic analysis method based on the panel method, new section design ways, the effective operating curves are integrated into a whole design system of the unsteady propeller , the design system is effective and reliable by the design example, the model test and the application to the full scale ship .
     本文把升力线和升力面设计方法、基于面元法预报螺旋桨非定常性能的谐调分析方法,新剖面设计方法、有效运转曲线计算方法组合为一套完整的非均匀流场中螺旋桨设计计算系统,经实例设计和模型试验及实船的应用,该设计系统是可靠且有效的。
短句来源
     The computer program has following advantage: the solution of main blade is by iterative scheme in time domain, the Kutta condition is used by explicit equal pressure condition, the Jacobian matrix which can reflect the influence on the difference between the upper and lower surface at trailing edge by dipole is calculated in each iterative procedure, in order to improve the convergence of iteration.
     本文编制的螺旋桨非定常性能预报程序是针对主叶在时域中迭代求解的,Kutta条件采用的是显式的等压条件,求解中为了提高迭代的收敛性,在每次迭代中都重新计算反映偶极子强度对尾缘处上下表面压力差影响的Jacobi矩阵。
短句来源
     Both of the calculated results are compared with the existing experimental data respectively and good agreements are obtained. Finally, the transient analysis of the propeller DTNSRDC 4118 is made and the variations of K T and K Q with J are shown. It is proved that the method is promising in the propeller performance prediction, especially under the start or stop conditions.
     对ITTC建议的轴承力校核计算的螺旋桨,在给定的伴流场条件下计算其非定常性能,与试验结果和其他的理论方法比较,结果令人满意.最后计算了DTNSRDC4118桨在变工况下性能变化过程,显示了该方法用于螺旋桨性能预估的前景.
短句来源
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  相似匹配句对
     Prediction of Unsteady Performance of Ducted Propellers
     导管螺旋桨的非定常性能预估
短句来源
     Prediction of Unsteady Performance of Propeller by Surface Panel Method
     螺旋桨非定常性能的面元法预报
短句来源
     Plant Performance
     设备性能
短句来源
     application forecast;
     性能预测;
短句来源
     SOME REMARKS ON UNSTEADY AERODYNAMICS
     关于非定常空气动力学
短句来源
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  unsteady performance
The tunnel and propeller problem is solved directly to predict the fully unsteady performance of the cavitating propeller.
      
Unsteady performance of heterogeneous catalytic reactions
      
Prediction of the unsteady performance of contra-rotating propellers by lifting surface theory.
      


Unsteady performances of the propeller operating in the non-uniformwake field are computed by using the unsteady numerical lifting-surface theorybased on the new trailing vortex wake model,which has been successfullyapplied to steady propeller problems.The vortex lattice method is employed.The propeller loading and blade thickness are denoted by vortex and sourceelements respectively.Calculations are carried out for the propeller recomm-ended by the Propeller Committee of 14th ITTC for comparative calculations...

Unsteady performances of the propeller operating in the non-uniformwake field are computed by using the unsteady numerical lifting-surface theorybased on the new trailing vortex wake model,which has been successfullyapplied to steady propeller problems.The vortex lattice method is employed.The propeller loading and blade thickness are denoted by vortex and sourceelements respectively.Calculations are carried out for the propeller recomm-ended by the Propeller Committee of 14th ITTC for comparative calculations onunsteady propeller blade forces and for the thrust and torque variation of oneblade of an AU propeller in harmonic wake.The results are compared withother prediction methods.The usefulness of the present method is verified.

本文利用非定常数值升力面方法计算了运转于非均匀流场中的螺旋桨性能,该方法建立在作者提出的新的定常螺旋桨尾涡模型的基础上,在用圆锥螺旋面模拟的过渡区尾涡片中,加入了泄出涡以反映非定常特性.数值计算的升力面方法采用离散的涡、源奇点系,并编制了相应的非定常性能计算的计算机程序.最后,对14届ITTC 螺旋桨委员会提供的实例以及其他例子作了比较计算,结果表明,本法是可行的.

In terms or distribution of singularicst, Ihis paper applies iteration to the determination of after vortex geometric parameters. Estimations are carried out for the sleady and unsteady performace of the propeller. The results obtained in the paper tells the feasibility of using this method which proves to be much more precise than the method by experiencc.

本文采用奇点分布的方法,选择了收缩卷曲的尾涡模型,通过迭代计算确定螺旋桨尾涡几何参数,并进行定常和非定常性能预估。结果表明,采用迭代方法确定尾涡几何参数、进行螺旋桨性能预估是可行的,其计算精度较经验方法也有所提高。

An unsteady nonlinear vortex lattice method is applied to the evaluation of unsteady performance of propellers and induced velocities behind propellers. The method is further extended to calculations of the transient response of propellers to changes in advance coefficient J . First, induced velo cities behind propellers DTNSRDC 4381 and 4383 are computed. Then, unsteady performance, bearing force, of a propeller operating in a given wake field proposed by ITTC is calculated. Both of the calculated...

An unsteady nonlinear vortex lattice method is applied to the evaluation of unsteady performance of propellers and induced velocities behind propellers. The method is further extended to calculations of the transient response of propellers to changes in advance coefficient J . First, induced velo cities behind propellers DTNSRDC 4381 and 4383 are computed. Then, unsteady performance, bearing force, of a propeller operating in a given wake field proposed by ITTC is calculated. Both of the calculated results are compared with the existing experimental data respectively and good agreements are obtained. Finally, the transient analysis of the propeller DTNSRDC 4118 is made and the variations of K T and K Q with J are shown. It is proved that the method is promising in the propeller performance prediction, especially under the start or stop conditions.

用非定常非线性涡格法计算螺旋桨尾流场和预估非定常性能,并进一步计算了瞬变工况下螺旋桨性能.对DTNSRDC4381和4383桨的尾流场进行了校核计算,取得了理想的结果;对ITTC建议的轴承力校核计算的螺旋桨,在给定的伴流场条件下计算其非定常性能,与试验结果和其他的理论方法比较,结果令人满意.最后计算了DTNSRDC4118桨在变工况下性能变化过程,显示了该方法用于螺旋桨性能预估的前景.

 
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