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1)  hole-openi ng factor
开孔系数
2)  orifice coefficient
孔板系数,开孔率,孔口系数,测量孔板系数,流出系数
3)  perforated parameters
开孔参数
1.
Analysis on perforated parameters for heat transfer of light steel-framed composite wall;
轻钢龙骨腹板开孔参数对复合墙体传热的影响
4)  Number of aperture
开孔数
5)  discharge coefficient
孔流系数
1.
Their discharge coefficients were obtained by Hughmark -O'Connell's correlation.
在直径500 mm的有机玻璃塔内,以空气为物系,对普通筛孔塔板和锥形筛孔塔板的干板压降进行测定,根据Hughmark-O'Connell关联式计算得到孔流系数。
2.
After comparing with three kinds of sieve trays under the same conditions, the results show that dry plate pressure drop of upper taper sieve trays is less 20% ~ 30% than that of common sieve trays, and discharge coefficient of upper taper sieve trays is larger than that of common sieve.
本文研究了普通筛板、下锥形筛板和上锥形筛板的干板压降情况,考察了孔径、板厚、孔间距、锥形斜角等因素对孔流系数的影响,提出对于大孔径筛板,在用孔流系数关联干板压降时,并不是都要引入修正系数1。
6)  the coefficient of borehole reaming
扩孔系数
1.
Based on the site situation of interrupting work of bored piles during the construction of Maoliger Large Bridge in Hohhot-Hailar Corridor,Inner Mongolia,such as the collapse of boring wall,interrupting piles,on large side of the coefficient of borehole reaming,the rock stratum being stiff,etc.
针对内蒙古茂力格尔大桥基础钻孔桩施工过程中容易出现的坍塌断柱、扩孔系数偏大、岩层硬等实际情况,采取相应的质量保证措施,确保大桥钻孔桩的工程质量。
补充资料:布气临界开孔率
分子式:
CAS号:

性质:均匀分布流体的分布板的最小开孔率,也是区分高压降分布板和低压降分布板的标志。郭慕孙根据散式流态化的理论和高压降分布板的概念,导得分布板的临界开孔率式中,流量系数c=0.99[d0/t)-0.125;L为床高;g为重力加速度;u为表观线速;ρf为流体密度;△ρ为颗粒与流体的密度差;d0为分布板孔径;亡为分布板厚度,对于具有散式特征的某些细粒流化床;n=4.65;εmf=0.4。

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