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1)  necking coefficient
缩口系数
2)  jet area contraction coefficient
喷口收缩系数
3)  compressibility coefficient
压缩系数
1.
Discussion and development on calculation method of rock compressibility coefficient;
对岩石压缩系数计算方法的讨论及改进
2.
The article discusses the pressure and intermolecular force of gas system,new physical meaning of gas compressibility coefficient,and three pressures of gas system.
对天然气体系压力与分子力、天然气压缩系数新的物理意义、天然气体系中的 3种压力进行了讨论 ,给出了 3种压力计算实例 ,得出了井眼内天然气内压力的一个重要性质 ,文中介绍的方法是气柱压力计算方法系统讨论的基础。
3.
Three methods are put forward in this paper by strict mathematical deduction based on the theoretical study of rock pore compression and the conception of compressibility coefficient.
在岩石孔隙压缩理论研究的基础上,根据压缩系数的概念,通过严格的数学推导,提出了三种孔隙度地下压缩校正方法,并利用油田实际覆压下的岩石孔隙度压缩实验资料进行了分析验证。
4)  coefficient of compressibility
压缩系数
1.
In order to compare the filtration characteristic of sludges from the two kinds of MBR,the specific cake resistance and the coefficient of compressibility of these fractions were mensurated.
首先将好氧MBR污泥和厌氧MBR污泥分离成悬浮固体、胶体+溶解性物质和溶解性物质3种组分,然后通过测定污泥及各组分的比阻和压缩系数对两种MBR污泥的过滤性能进行比较研究。
2.
Besides, the paper mostly discusses and analyzes the variance rule of the coefficient of compressibility and oedometric modulus of compression in the different pressure regions and the variance rule of the coefficient of consolidation.
通过碱渣的压缩试验 ,研究了击实碱渣的压缩变形性质 ,讨论和分析了击实碱渣在不同压力区间的压缩系数及压缩模量的数值分布规律和固结系数的数值变化规
3.
On the basis of the analysis of the relation between the physical indexes and the mechanical indexes,by means of RBF neural network system,and in terms of the earth s water ratio,density,pore-solids ratio and plastic index,the coefficient of compressibility is pre-tested.
在分析土的物理指标与力学指标关系的基础上,利用RBF神经网络,采用土的含水率、密度、孔隙比与塑性指数来预测土的压缩系数。
5)  compressibility [英][kəm,presi'biliti]  [美][kəm,prɛsə'bɪlətɪ]
压缩系数
1.
Experiment and correlation for compressibility of crude oils;
原油压缩系数实验与关联
2.
A theoretical formula of vuggy rock compressibility;
溶洞介质的压缩系数计算公式
3.
Effect of rock compressibility on reservoir dynamic reserves determination;
岩石压缩系数对油藏动态储量计算结果的影响
6)  shrinkage coefficient
干缩系数
1.
The shrinkage coefficients of compressed sample increased gradually with the increase of the compression rate while th.
对大青杨辊压处理材(压缩率10%~50%)的密度和干缩系数进行测试和研究。
2.
The shrinkage coefficient, basic density, ring width, latewood percentage and microfibrillar angles of five short-period Pinus taeda L.
6m5个高度的木材干缩系数、基本密度、生长轮宽度、晚材率和微纤丝角度,按生长轮取样,进行了测量和统计分析。
3.
It analyses the factors of affecting the shrinkage of cement concrete,and through research on the shrinkage experiment of cement concrete it is regression and gets the relation equation of the shrinkage coefficient of cement concrete and the time by using the least squares selected model,to realize the shrinkage performance of cement concrete.
分析了影响水泥混凝土收缩的因素,通过对水泥混凝土干缩试验的研究,利用最小二乘法选取模型回归得到水泥混凝土的干缩系数与龄期的关系方程,从而更好地了解水泥混凝土的干缩性能。
补充资料:缩流系数
分子式:
CAS号:

性质:当流体在管内流经一个突然缩小的截面(例如流经孔板或变径管)时,由于惯性的作用,流体经此缩孔后,其流动截面并不能立即与下游的管截面相等,而是在一定距离内继续收缩,然后才逐渐扩大到下游的整个管截面。流体在这个从收缩到扩大的过程中,在孔口下游某处,流动截面最小,此处称为“缩脉”。缩脉的直径Dc不仅比管径D小,而且也比孔口直径D0小。缩脉截面积与孔口截面积之比称为缩流系数Cc可用下式表示:Cc=(Dc/D0)2。在利用孔板流量计测量流量时,以及在计算流体的能量损失时,都应计入缩流系数的影响。

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