The results indicated: Adopting the synchronous measure method of high distinguishing two-CCD for the very first time, the details of the flow field which is behind reversed tainter valve were acquired; the biggest value of the recirculation zone length of flow behind reversed tainter valve was attained, then with opening degree increases the recirculation zone length reduces gradually; the contraction coefficient of different valve opening were found out directly; by analysing measured field of vorticity, we knew to have the stronger pulsation phenomenon at adhesion point. With increasing of the valve opening the range of the recirculation zone length and the contraction coefficient was reduced continuously; With increasing of Re the open channel ridge recirculationzone length was increased continuously.
研究成果表明：首次采用高分辨率双CCD同步测量方法，获得了反弧门后精细的水流流场；反弧门后水流回流区长度在0.2开度达到最大值，然后随开度的增大回流区长度逐渐减少；直接测出了反弧门不同开度的收缩系数值；通过涡量场的分析，可以直观反映出在小开度情况下，再附着点具有较强的脉动现象；回流区变化幅度与收缩系数变化幅度随开度的增大不断缩小；明渠跌坎水流回流区长度L_r随雷诺数Re的增大而增大。
The results indicated: Adopting the synchronous measure method of high distinguishing two-CCD for the very first time, the details of the flow field which is behind reversed tainter valve were acquired; the biggest value of the recirculation zone length of flow behind reversed tainter valve was attained, then with opening degree increases the recirculation zone length reduces gradually; the contraction coefficient of different valve opening were found out directly; by analysing measured field of vorticity, we knew to have the stronger pulsation phenomenon at adhesion point.
研究成果表明：首次采用高分辨率双CCD同步测量方法，获得了反弧门后精细的水流流场；反弧门后水流回流区长度在0.2开度达到最大值，然后随开度的增大回流区长度逐渐减少；直接测出了反弧门不同开度的收缩系数值；通过涡量场的分析，可以直观反映出在小开度情况下，再附着点具有较强的脉动现象；回流区变化幅度与收缩系数变化幅度随开度的增大不断缩小；明渠跌坎水流回流区长度Lr随雷诺。。。
The main research contents of this project are: establishing the numerical computation model of the cavitating flow based on the N-S equation of the three-dimensional viscous unsteady flow; predicting the unsteady characteristic of the flow field in hydraulic turbine flow passage; uncovering the phenomenon of the seperated flow, forming and falling off of the vortex which may appear in the flow passage of the water turbine; discussing its mechanism at the same time and then predicating the pressure pulsation which is caused by the fluid motion; and then analysing the hydraulic resonance characteristic in order to predict the hydraulic steady condition of the power station.
本项目主要的研究内容是：建立基于三维粘性非定场N-S方程的数值计算模型，预测水轮机过流部件内部非定场流场特性，揭示过流部件内部可能的分离流、漩涡形成和脱落等现象，探讨其机理，并由此预测因其流体运动所引起的压力脉动，并对过流部件的水力共振特性进行分析，作出机组水力稳定性状况的预测。
The fact flat the hydraulic pressure pulsation value of large Francis turbine can not be converted from the correlative model test makes it difficult solving the vibration phenomenon of prototype turbine.
大型混流式水轮机的水压力脉动值不能直接从模型试验值进行换算，给解决真机振动问题增加了不少困难。
In the paper, the principal result of the prototype observation is presented, and the special local hydraulic phenomenon, flow pulsation, vibration character of the pier, aerated fogging, dissipation of energy and effect of decreasing erosion are also discussed.
本文介绍了这次原型观测的主要成果，对其特殊的局部水力现象，水流脉动和墩体振动特性，水流掺气雾化，以及掺气消能减蚀效果等进行了探讨。
By analysing measured field of vorticity, we knew to have the stronger pulsation phenomenon at adhesion point.
通过涡量场的分析，可以直观反映出在小开度情况下，再附着点具有较强的脉动现象；
Appearance of torque pulsation phenomenon influences systems running quality and reliability, when an induction motor (IM) operates in the manner of variable frequency and variable speed.
建立了考虑逆变器死区时间的异步电动机系统整体数学模型，研究逆变器死区时间对系统转矩脉动的影响。
This article key innovation designed one kind of falling plants evenly, which made the pulsation phenomenon of the seeder-metering device been solved by making the seed through the collision different number of times cushion piece uniform continuity falls in plants in the ditch.
本文重点创新设计了一种落种均匀器，使得排种器由于脉动现象排出的一股一股种子通过碰撞不同次数的缓冲片使种子均匀连续地落在种沟里。
Weigert for discussing when the instability will occur in the thermonuclear source of a star, the conditions of the occurrence of the instable phenomenon (also known as thermal pulsation) in a shell source are strictly derived in this paper.
Weigert讨论恒星内部热核源何时会产生非稳定现象的方法，对壳层源产生非稳定现象（又称热脉动）的条件进行了严格推导。