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fluctuation pressure     
相关语句
  脉动压力
     Experimental Measurement of Fluctuation Pressure fields Induced by High-speed Gas-jets under Water
     水下高速气体射流诱导脉动压力场的实验测量
     Numerical Simulation of Reynolds Stresses Influence on Mean and Fluctuation Pressure
     雷诺应力对平均和脉动压力影响的数值模拟
短句来源
     Based on test result, the distribution and character of the coherence function and scale of the fluctuation pressure are discussed.
     根据试验结果,研究了脉动压力相干函数与相干尺度的分布,并对其一般性质作了一些讨论。
短句来源
     Then the fluctuation pressure field produced by the side mirror of a Santana car was studied in wind tunnel experiments. The highest fluctuation pressure level had reached 132.5dB on the surface of the car body at a speed of 90 km/h.
     通过风洞试验研究了桑塔纳轿车后视镜产生的脉动压力场的分布情况,测出在相当于90km/h的车速下,作用在车身表面的脉动压力级最大处达132.5dB。
短句来源
     Research on Solution of Fluctuation Pressure Field for Automobile with Numerical Method
     用数值解法求解汽车后视镜脉动压力
短句来源
更多       
  波动压力
     A Prediction Model for Quasi-Momentary State Well Fluctuation Pressure
     拟瞬态井内波动压力预测模型
短句来源
     Calculating results show that fluctuation pressure decrease with eccentricity between drill stem and well bore increase.
     计算结果表明:随钻柱与井眼间偏心度增大,波动压力减小。 全偏心情况下的波动压力大约只有同心情况下的一半。
短句来源
     the model can predict the actual fluctuation pressure value more accurately than the now widely used steady state model, which will be helpful to the scientific hole structure design, the determination of drilling fluid density and the control of the complex problems in a hole.
     该模型预测值比目前广为应用的稳态模型预测值更接近并内实际波动压力值,这将有助于井身结构设计的科学性、钻井液密度确定和井下复杂事故的控制。
短句来源
     APPROXIMATE SOLUTION OF STABLE FLUCTUATION PRESSURE OF NEWTONIAN FLUID IN ECCENTRIC ANNULAR
     偏心环空中牛顿流体稳态波动压力近似解
短句来源
     On the basis of concentric annular fluctUation pressure model, approximate solution of eccentric annular was soluted.
     在建立同心环空波动压力的精确模式基础上,求解了偏心环空稳态波动压力的近似解。
短句来源
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  起伏压力
     Experimental study on spectrum of turbulent-boundary-Layer fluctuation pressure and response of a PVDF hydrophone
     湍流边界层起伏压力谱和聚偏氟二乙烯薄膜(PVDF)水听器响应的实验研究
短句来源
     Estimation of parameters of the turbulent boundary layer fluctuation pressure model by use of a line array
     利用线阵估计湍流边界层起伏压力模型参数
短句来源
     The point power spectrum density and the wavenumber frequency spectrum density of turbulent-boundary- layer fluctuation pressure are measured by use of a φ8 mm hydrophone and a 20-element array, respectively.
     利用一个 φ8 mm水听器和一个 20元阵在水洞中测量了湍流边界层起伏压力的点功率谱密度和波数频率谱密度。
短句来源
     The models of the turbulent boundary layer fluctuation pressure(TBLFP) are the basis for the prediction of the flow noise of hydrophone arrays and the vibration and radiation of underwater structure excited by flow However, the parameters of models (for example, the Corcos model) contain many parameters to be determined by the experiment including point power spectrum density and convection velocity.
     湍流边界层起伏压力模型是预报水听器阵流噪声及流激水下结构振动和声辐射的基础,但湍流边界层起伏压力模型(如Corcos模型)都为经验模型,含有多个需要试验确定的待定参数,其中包括点功率谱密度与迁移速度.
短句来源
  “fluctuation pressure”译为未确定词的双语例句
     SPATIAL—TIME CHARACTERISTIC AND INTEGRAL LENGTH OF FLUCTUATION PRESSURE ON WALL
     脉动壁压的空—时特征与积分尺度
短句来源
     In this paper,the vibration of a plate subjected by fluctuation pressure from aerated flow were studied by combination of test and numerical calculation.
     本文采用试验与数值计算相结合的方法研究了掺气水流作用下板的振动问题。
短句来源
     The influence of pressure ratio of intensifier and accumulator volume on the pressure fluctuation are explored by experiment. The relationships between the cutting speed and pressure fluctuation, pressure of system, cutting parameters and the abrasive are tested and analyzed.
     试验和分析了增压器的增压比、稳压器的容积对系统压力波动特性的影响及系统压力波动、系统压力、切割参量和磨料与切割速度之间的关系。
短句来源
     Using optic fiber and pressure sensors to detect pressure fluctuation,pressure difference and particle concentration signals in order to study the characters of the bed under low velocity. Fluctuation complexity is chosen to analyze these three time series.
     利用光纤、压力传感器同时获取气固流化床不同位置颗粒浓度、压差、压力信号时间序列,运用涨落复杂性参数分析三种信号时间序列,研究聚氯乙烯颗粒在低气速下的流化状况。
短句来源
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This paper presents a studg of the spatial—time characteristic of fiuctuation pressure on uau ahich is treated as a stativnarg random process. The basic success of the hgpothesis of the partial "Turbulent Freezing" on the free jump part has been verified. A trasmitting speed of fluctuation pressure on coan is determined, and the distribution of integral length among the water course is discassed. The auto—model cnaracteristic of integral lengral length in jump is presented for the first time.

本文对作为平稳随机过程的脉动壁压的空—时特征进行了研讨,证实了局部紊动冻结性假设在自由水跃区基本成立,确定了脉动壁压传送速度,探讨了积分尺度沿流分布,首次提出了积分尺度在水跃区的自模拟特性。

This paper deals with some basic characteristics of pressure fluctuations on bed beneath combined flow with surface jet and submerged jet.The results obtained show that the experimental data of pressure fluctuations in the flow accord with Gaussian distribution.The paper gives the value of the coefficient K of half-extrema difference of amplitude of pressure fluctuations in different flow patterns,and discusses the features of the distribution of pressure fluctuation coefficient C_p′ on bed and the charac- teristics...

This paper deals with some basic characteristics of pressure fluctuations on bed beneath combined flow with surface jet and submerged jet.The results obtained show that the experimental data of pressure fluctuations in the flow accord with Gaussian distribution.The paper gives the value of the coefficient K of half-extrema difference of amplitude of pressure fluctuations in different flow patterns,and discusses the features of the distribution of pressure fluctuation coefficient C_p′ on bed and the charac- teristics of frequency spectra.In addition,the study also shows that flow patterns have a remarkable influence on the value of coefficient K and the distribution of the coefficient C_p′ of fluctuation pressure and the frequency spectrum of fluctuation pressure.

本文介绍了作者关于面流、戽流床面压力脉动特性试验研究的主要成果。通过对260个点脉动压力数据的分析证明,将面流与戽流床面压力脉动数据视为正态分布是符合实际的。本文还给出了半极差系数K值的取值范围,并讨论了脉动压力系数Cp′沿床面的分布规律以及各主要流态下床面脉动压力的频谱特性。试验结果表明,流态对半极差系数K的取值、脉动压力系数沿床面分布规律以及脉动压力的频谱特性均有显著的影响。

In this paper,the statistical method for estimating the maximum instantaneous distor-tion in Ref. [1] is developed further to estimate the maximum values of the instantaneous distortion index DCθ in which the operation of peak values of dynamic pressures are in-volved. The effects of the correlation between fluctuating pressures and the amplitude probability density of the instantaneous distortion on the estimation are discussed. Com-parison between the estimated values and the experimental results shows that...

In this paper,the statistical method for estimating the maximum instantaneous distor-tion in Ref. [1] is developed further to estimate the maximum values of the instantaneous distortion index DCθ in which the operation of peak values of dynamic pressures are in-volved. The effects of the correlation between fluctuating pressures and the amplitude probability density of the instantaneous distortion on the estimation are discussed. Com-parison between the estimated values and the experimental results shows that the newly developed method can quite accuratedly estimate the maximum value of the instantaneous distortion involving the operation of peak values of dynamic pressures.such as the distor-tion index DCθ. The accuracy of estimation of maximum instantaneous distortion can be improved further by considering the correlation between fluctuation pressure and the real amplitude probability density of the instantaneous distortion.

本文依据文[1]中提出的最大瞬时畸变值估算方法的基本思想,给出了具有极值运算的畸变指数DC_θ的最大瞬时畸变值的预估思路,从而使文[1]预估方法不独适用于美国P&W公司给出的一类畸变指数(K_(A2),K_(rad),K_θ),同时也适用于英国罗·罗公司给出的具有极值运算一类的畸变指数DC_θ等。文中还讨论了考虑脉动压力相关、瞬时畸变的概率分布等因素对DC_θ最大瞬时畸变值预估的影响,结果表明可提高预估精度。

 
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