在流体力学中常用“水头”代表高度。如概述图所示,则图一(图一正文)中z表示该点到基准面的高度称为位置水头,取0—0为基准面,在测点的容器壁上接一端与大气相通的管子,称为测压管。p/ρg表示测压管液面到该点的高度,称为压力水头。
压力水头(pressure head):含水层中某点的压力水头(h)指以水柱高度表示的该点水的压强,量纲为L,即:h =P/ g,式中 P为该点水的压强;g为水的容重,。
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... hydraulic gradient水力坡降;水力比降;水力坡度 hydraulic head压力水头 hydrobromic ether乙基溴;溴乙烷 ...
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... piezometric head 测压水头 ; 测压管水头 ; 压力水头 ; 力水 piezometric surface 水压面 ; 量压面 Piezometric Level 测压管水位 ; 测压水位 ...
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...文则改进了Tartakovsky and Neuman (2007)所发表的解,将线性化的Richards’ equation中随毛细压力水头(capillary pressure head)呈现指数函数变化的水力传导系数 (hydraulic conductivity)与孔隙水含量(water conetnt),改成以参数的方式来表现其特性,并且 考...
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The primary contents are as follows:(1) Based on the fundamental seepage physical equation, the basic differential equation of saturated-unsaturated seepage in porous mediums has been deduced, in which the pressure head is the fundamental unknown quantity.
总体说来,本文主要从以下几个方面开展了研究: (1) 由基本渗流物理方程出发,以压力水头为基本未知量推导多孔介质三维饱和—非饱和渗流微分方程,在此基础上分析了边坡在有降雨入渗条件下渗流的定解条件和计算模型。
参考来源 - 降雨入渗对边坡稳定的影响·2,447,543篇论文数据,部分数据来源于NoteExpress
这种泵效率高、经济、简单、体积小,可压送压力水头高达250英尺的水量。
This pump is efficient, economical, simple and quite small. It can be built to furnish almost any amount of water against pressure heads of up to 250 feet.
以压力水头为因变量的数学模型可以模拟供水压力和灌水器特性对灌溉效果的影响。
A mathematical model whose variable is water head can simulate the effects of water head and properties of subsurface irrigation pipe on irrigation.
通过摄动方法得到一系列关于水头展开式的偏微分方程,用有限差分法进行求解,获得了压力水头的随机描述,并计算其均值和方差。
The equations are solved by finite difference method and the mean and variance of pressure head are determined from its random expression.
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