1) vena contracta coefficient
vena收缩系数
1.
Constant value of vena contracta coefficient has been commonly used in the quasi-steadymodels for computing the nonlinear acoustic impedance of an oriflce.
在研究高声强下微圆孔声学非线性效应时,准定常模型的一个明显不足是采用固定不变的 vena收缩系数,因而影响了预测精度。
2) contraction coefficient
收缩系数
1.
In this paper,the method calculating the critical cracking temperature is analyzed, which comprises the fitting model to stiffness modulus master curve of asphalt, and the effects of cooling rate and contraction coefficient on the result of the critical cracking temperature.
按照沥青临界开裂温度的计算过程进行了试验,并对结果进行了分析;对沥青的劲度模量主曲线的拟合模型进行了研究,分析了降温速率和收缩系数对沥青临界开裂温度的影响,结果表明计算临界开裂温度的方法需要进一步改善。
2.
Based on the fundamental theory of hydrodynamics, the flow characteristics at the junction of the pressurized pipe with rectangular cross section were fully investigated, and general analytic expressions for both contraction coefficient and local energy loss were worked out.
采用水动力学基本理论,对矩形断面有压管道汇流口的水力特性进行分析研究,提出收缩系数及局部能量损失系数的综合表达式,并与试验结果进行了比较。
3.
Based upon the experimental investigation and theoretical analysis, the shape and size of the separation zone are studied, and the formulations for both contraction coefficient and energy loss coefficients are presente.
采用水力学基本理论及试验手段,对等宽明渠交汇口水流分离区的形状及尺寸进行了理论分析和试验研究,提出了分离区收缩系数及能量损失系数的理论表达式并与试验结果进行了比较。
3) Coefficient shrink
系数收缩
6) coefficient of shrinkage
收缩系数
1.
The experimental results indicate that the coefficient of shrinkage increases as the drying rate decreases,and that the drying process is linear at the beginning and then becomes nonlinear.
试验结果表明,膨胀土的收缩系数随脱湿速率的减小而变大,并先呈现线性脱湿过程,后呈现非线性脱湿特征;在相同含水率条件下,膨胀土的吸附强度亦随脱湿速率的减小而增大,尤在含水率和围压较低时更趋明显。
补充资料：vena contracta
分子式：
CAS号：
性质：又称流颈。流体流经突然缩小的管子时流道断面的最小处。当流体流近突然缩小处，流道发生收缩，流体静压力下降，流速加大。由于惯性作用，在管子突然缩小处流动截面并不立即扩大到与小管的截面积相等，而是继续收缩一定距离后才逐渐扩大到整个小管截面，此流动断面最小处就是缩脉。
CAS号：
性质：又称流颈。流体流经突然缩小的管子时流道断面的最小处。当流体流近突然缩小处，流道发生收缩，流体静压力下降，流速加大。由于惯性作用，在管子突然缩小处流动截面并不立即扩大到与小管的截面积相等，而是继续收缩一定距离后才逐渐扩大到整个小管截面，此流动断面最小处就是缩脉。
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参考词条