理论与实验研究结果表明该方法可消除渡越时间效应、湍流和采样单元内流速梯度造成的频谱模糊。
Theoretical and experimental results show that this method can eliminate the Doppler ambiguity spectra produced by transit-time effect, turbulence and velocity gradient in sample volume.
文章分析了与折冲流有关的因素，如压差、压力和流速梯度以及渥奇面参数，进而提出了修改方案，基本解决了该孔存在的折冲流问题。
The factors related to the oblique flow, such as pressure difference, pressure and velocity gradients and the parameter of Ogee surface are also analysed.
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。
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.
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