The vortex shedding frequency spectrum characteristics on a heated circular cylinder in water cross flow was investigated experimentally.
本研究对水平液体绕流热圆柱体的旋涡脱落特性进行了研究。
Besides, in case the vortex shedding frequency is equal to a inhere frequency of rod, the rod will arises the vortex shedding resonance or called vortex resonance.
并且当漩涡脱落频率与杆件的固有频率接近时，杆件会产生漩涡脱落共振或称涡激共振。
The shedding frequency computation model built in this paper can be used to predict the shedding frequency of the Karman vortices for designing hydraulic turbines.
本文建立的水轮机固定导叶和活动导叶后卡门涡频率预估模型，可在设计阶段进行叶片绕流卡门涡频率的预估。
Besides, in case the vortex shedding frequency is equal to a vibration frequency of structure, the rod will occur the vortex shedding resonance or called vortex resonance.
并且当漩涡脱落频率与杆件的固有频率接近时，杆件会产生漩涡脱落共振或称涡激共振。
Besides, in case the vortex shedding frequency is equal to a vibration frequency of structure, the rod will arises the vortex shedding resonance or called vortex resonance.
并且当漩涡脱落频率与杆件的固有频率接近时，杆件会产生漩涡脱落共振或称涡激共振。
The vortices shedding frequency calculation model proposed by this paper can be used to predict the shedding frequency of the Karman vortices for hydraulic turbines design.
本文建立的水轮机固定导叶和活动导叶后卡门涡频率预估模型，可在设计阶段进行叶片绕流卡门涡频率的预估。
Meanwhile the vortex shift waveform is obtained from the estimated mean frequency waveform using a suitable low-pass filter. Then the vortex shedding frequency and amplitude can be calculated.
用合适的滤波器可以从估计出的平均频率曲线中得到涡流的波形，并且计算表征涡流的涡流经过频率和幅度特征参数。
Underfrequency Load Shedding (UFLS), which is the third defensive line of power system, is one of effective methods to mitigate the frequency collapses.
低频减负荷（UFLS）作为电力系统的第三道防线，是一种防止系统频率崩溃的有效手段。
The problem of altering the rotating coordinate system to absolute coordinate system is often encountered when the frequency characteristics of unsteady vortex shedding in turbine engine is studied.
在研究叶轮机械转动部件非定常旋涡脱落频谱特性时，难以避免会遇到旋转坐标系向绝对坐标系转换的问题。
Moreover, because the intensity of vortex shedding in the wake of the guide vane is too weak, it's frequency has no influence on the vibration characteristics of the low-pressure compressor rotor.
同时由于导流体尾迹内部脱落涡强度太低，其脱落频率也不会对发动机低压转子振动特性产生影响。
During the design of under frequency load shedding (UFLS) schemes, some simple models for frequency dynamics analysis are obviously inadequate since they do not take system voltage into account.
进行系统低频减载方案设计时，简单的频率响应模型由于未考虑系统电压对频率过程的影响而导致不少情况下无法适用。
For exerting the functions of the automatic under-frequency load-shedding device, setting for the device should be calculated correctly.
为有效发挥自动低频减负荷装置的重要作用，应正确进行装置定值的整定。
Through analysis of the stability of NanBian power supply system in a steel enterprise, under-frequency load-shedding plans and regional security and stability control plans are adopted in this paper.
本文通过对某钢铁企业南变电力系统的稳定性分析，给出了低频减载和区域安全稳定控制两种方案。
Underfrequency load shedding (UFLS) is a widely accepted effective measure to repress further frequency drop. Most of UFLS schemes use pre specified steps based on measured frequency to shed load.
低频减载(UFLS)无疑是一种抑制频率下降的有效方法，它依据测量到的频率值，按轮次分步骤地减掉负荷。
The frequency of vortex shedding was determined with a laser interferometer.
涡的分离频率由激光干涉仪测量。
Power system of the "three lines of defense" concept put forward, more enhanced low-frequency-low-voltage load shedding equipment status.
电力系统“三道防线”概念的提出，更增强了低频低压减载设备的地位。
Power system of the "three lines of defense" concept put forward, more enhanced low-frequency-low-voltage load shedding equipment status.
电力系统“三道防线”概念的提出，更增强了低频低压减载设备的地位。
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