英语释义

1. the space rate of variation of pressure in a given direction specifically such rate of variation in a direction normal to an isobar

片语

pressure e gradient气压梯度

pressure-gradient transducer压差能换器

mitral pressure of gradient二尖瓣跨瓣压差

pressure e gradient force气压梯度力

pressure-gradient force[气象] 气压梯度力

pressure-gradient hydrophone压力梯度水听计

pressure difference[力] 压力差；[力] 差压；压力补偿器；气压梯度

pressure drop gradient压降梯度

pressure-gradient equations压力梯度方程组

英汉例句

• it is a difficult problem for reducing the errors of computing pressure gradient force(pgf) in the terrain-following vertical coordinates.

  地形跟随坐标系中水平气压梯度力的算法一直是困扰数值模式发展的关键问题之一。

• the impact of starting pressure gradient must be considered due to existence of starting pressure gradient and recovery difficulty during the development of low permeability oil reservoirs.

  低渗透油田由于存在启动压力梯度，开采难度很大，因此，在低渗透油田开发时必须考虑启动压力梯度的影响。

• the threshold pressure gradient of low permeability sandstone was studied experimentally by measuring the pressure attenuation in an unsteady seepage flow.

  为了研究低渗透砂巖的启动压力梯度，设计了一种非稳态渗流中测量压力的试验方法。

• the way to determine the suitable time and space interval is put forward by investigating the variation of gas pressure gradient on wall with several time and space intervals.

  通过考察选取不同时间步长和空间步长时煤壁瓦斯压力梯度的变化，提出了选取合适的时间步长和空间步长的方法。

• the finite difference method is used to solve the coupling model, and the influence of starting pressure gradient on the distribution of groundwater pollutant concentrations is analyzed.

  采用有限差分法和混合有限分析法对耦合模型进行数值求解，并分析了启动压力梯度对地下水污染浓度的影响。

• research on characters of non-darcy flow and starting pressure gradient of low permeability reservoir were foundation of reservoir production.

  低渗透储层渗流具有非达西特征和启动压力梯度，是研究低渗透储层开发过程中问题的基础。

• the method is presented to determine formation average pressure and boundary pressure with threshold pressure gradient and injection-production ratio.

  给出了考虑注采比和启动压力梯度的平均地层压力和边界压力的确定方法。

• the formation pressure gradient curve in the same depth of logging is computed by equivalent depth method.

  通过等效深度法计算出与测井曲线采样深度对应的地层压力梯度曲线。

• the method can be extended to axisymmetric and three-dimensional turbulent boundary layers if the pressure gradient effect is considered.

  如果考虑压力梯度的影响，还可以将该方法推广到轴对称和三维湍流边界层中去。

• in a high energy combined perforation, the pressure gradient of detonation gas along cracks varies with time due to the influences of flow velocity, crack surface roughness and media permeability.

  在高能复合射孔压裂过程中，受爆生气体流动速度、裂缝表面粗糙度、裂缝周围渗透性等因素的影响，裂缝内压力梯度随时间而变化。

• release of the heat of fusion is believed to alter the pressure gradient in such a way as to diminish the destructive winds near the storm center.

  人们认为融解热的释放可以改变气压梯度，结果减小风暴中心附近的破坏性风力。

• the results indicate that using pressure build-up steady state pressure survey approach to calculate starting pressure gradient has obvious advantages with simple method and is theoretically correct.

  结果表明：压力恢复稳态测压法求解启动压力梯度理论正确，方法简单，具有明显的优点。

• it is found by the calculations that under inverse pressure gradient the averaged vorticity in boundary layer is somewhat transplanted to the wall.

  计算结果表明，递压梯度下的平均速度剖面中出现涡量向壁面的迁移现象。

• this article mainly introduces the prediction method of the flow pattern, pressure gradient and liquid holdup of two phase flow in horizontal pipelines.

  本文着重介绍水平管中这种两相流动的流动型态、压力梯度和持液率的预测方法。

• the results of calculations and experiments showed that the effect of the radial pressure gradient on secondary losses in the nozzle root was considerable.

  计算和实验表明，在实验范围内，径向压力梯度对根部二次流损失的影响仍然是可观的，必须加以考虑。

• therefore, the impact of starting pressure gradient must be considered when analyzing the productivity of vertical fracture well in low permeability reservoir.

  因此，在进行低渗透油藏垂直裂缝井产能分析时，必须考虑启动压力梯度的影响。

• modelling tests are made in this paper to check the error subtraction scheme of the pressure gradient force in models with topography developed by the authors.

  本文则用气候模式对作者提出的有地形数值模式中气压梯度力的误差扣除法进行了模拟检验。

• the method to analyze the pressure gradient with mean radial velocity is used.

  本文提出了利用平均径向速度分析压力梯度的方法。

• it points out that there is pressure gradient in every liquid in the earth, and that is an inequality caused by the earth.

  地球上的流体都具有压强梯度，这是由地球引力引起的流体的一种不均匀性，这种不均匀性会在流体的运动中表现出来。

• the testing results of a low permeability reservoir indicate that this ipr equation can effectively evaluate the impact of starting pressure gradient on inflow performance.

  某低渗透油田的测试分析结果表明，该ipr方程能有效评价启动压力梯度动态变化对油井动态的影响。

• the analysis of the truncation error in the vertical pressure gradient has been made with and without the pressure separation technique for different atmospheric stratifications.

  分析了气压分离和不分离，在几种不同的层结情况下，垂直气压梯度的截断误差。

• the high head produced by the impeller means high adverse pressure gradient within blade passage and because of this the flow often separates from the blade surfaces even at the design point.

  低比转速泵的高扬程决定了叶片流道内逆压梯度比较高，这种压力分布使得水流易于在叶片表面脱流分离，这一现象甚至在泵的设计点也难以避免。

• results also show that decrease of pressure gradient in winter and spring influences dust weather frequency by affecting wind speed indirectly.

  冬春季节气压梯度的减小是风速减小、进而导致沙尘日数减小的关键间接因素。

• an instrument for measuring the viscosity of a fluid by passing the fluid at a known pressure gradient or velocity through a length of tubing of known diameter.

  测试流体粘度的一种仪器，在实验中使流体在已知压力梯度或流速情况下流过已知直径的一段试管。

• with consideration of start up pressure gradient and media deformation, this paper studies vertical well production in low permeable reservoirs.

  考虑启动压力梯度和介质变形的影响，研究低渗透油藏中直井产量的变化规律。

• an ideal experiment exhibits that pressure gradient force computations in the pressure terrain-following coordinate are sensitive to surface pressure.

  在气压地形追随坐标中气压梯度力的计算对地表气压计算很敏感。