1)equivalent diameter当量直径
1.From the study of relation between specimen' s shape and plastic indicator for isotropic material, the concept of equivalent diameter is introduced, and the quantitative relationship between plastic indicator and the ratio of gauge length to equivalent diameter is established.首先针对各向同性A3钢,对试件形状对塑性指标的影响进行了研究,提出了当量直径(矩形试件宽度和厚度的函数)的概念,获得了塑性指标与当量直径、试件长度之间的定量关系,在形式上获得了与圆柱形试件类似的关系。
2.The experimental data of pressure drop was used to calculate equivalent diameter d s by Ergun formula.实验测定了一种新型的环柱形催化剂活性组分在其内、外表面上不均匀分布的乙烯基乙酸酯合成反应器的床层压降和该催化剂填充床的二维温度分布 ;以压降实验数据代入 Ergun公式计算了环柱形催化剂的当量直径 ds和填充床的传热参数 ,采用正交配置的方法对拟均相二维传热模型进行求解 ,得到床层的径向有效导热系数和壁给热系数。
3.This paper studied the influence of irregular shape catalysts with through-holes on the pressure drop of the fixed bed and determined the equivalent diameter of irregular shape catalysts with through-holes.本文具体研究异形多通孔催化剂对床层压力降的影响 ,并测定了异形多通孔颗粒的当量直径 。
英文短句/例句
1.Test method for diameter and equivalent diameter of carbon fiber by microscopyGB/T3364-1982碳纤维直径和当量直径检验方法(显微镜法)
2.Smith (1962) considered three alternate methods to determine an equivalent diameter of graded sediment.史密斯（1962）提出了三种不同方法以计算不均匀沙的当量直径。
3.About the Characteristic Dimentions and the Equivalent Diameter in the Calculation of Resistance and Heat Transfer of Fluid Flow in Ducts with complicated Geometry关于流动阻力与换热计算中的定性尺寸与当量直径
4.This author has found the most suitable characteristic dimension to be the equivalent passage diameter.这个作者发现了更恰当的特性作为当量通道直径。
5.The experimental results show that liquid jet diameter has obvious effect on Sauter mean diameter( SMD) when water/ air mass flux ratio is0.82～5.48.结果表明:当液气质量比为0.82~.48时,液体射流直径对雾滴直径有显著影响。
6.Measure the diameter of this circle.量一下这圆的直径。
7.crown diameter measurement in aerial photo授直径航空象片量测法
8.measure the diameter of something with calipers.用测径器测量某物的直径。
9.equivalent effective radius of a control rod控制棒当量有效半径
10.The Method and Instrument of Measuring Addendum Circle and Dedendum Circle Diameter齿顶圆与齿根圆直径的测量及其量具
11.High-Precision On-Line Measuring System for Cylinder Diameter with Large Range高精度圆柱直径大量程在线测量系统
12.The human eye has a pupil diameter which, of course, varies.人眼瞳孔直径当然是可变的。
13.Enlarging the agitator diameter properly, NB will be increased 13.6%.适当增加搅拌器直径,菌数可提高13.6%。
14.Comparative study of internal anterior chamber diameter measured by a Visante OCT and horizontal corneal diameter measured by an IOL MasterVisante OCT测量前房直径与IOL Master测量角膜水平直径的比较
15.Research on Flexible Online Measurement Technology for External Diameter of Large-diameter Bar大直径棒材外径在线柔性测量技术研究
16.Measurement of odd boss raceway diameter of linear motion ball bearing直线运动球轴承奇数凸台沟道直径的测量
17.Research on the Measurment of Diameter of Crystal Based on Image Processing Technology;基于图像处理的直拉单晶直径测量系统的研究
18.MMAD (Mass Median Aerodynamic Diameter)质量中质空气流动力学直径
相关短句/例句
equivalent circle diameter圆当量直径
3)Equivalent diameter等价径，当量直径
4)Flux equivalent diameter流量当量直径
5)Mist Equivalent Diameter雾滴当量直径
6)equivalent diameter discriminant当量直径判别法
1.According to the defect features of concrete-filled steel tubular (CFST) and the basic principle of ultrasonic testing, equivalent diameter discriminant, area discriminant and derivation discriminant formula were raised.根据超声波检测技术的基本原理和钢管混凝土缺陷的特点,提出了钢管混凝土缺陷当量直径判别法和面积判别法及相应的判别公式,当量直径判别法和面积判别法可分别作为一般钢管混凝土内部缺陷的定性和定量检测,工程实测结果表明,当量直径判别法和面积判别法具有较高的可靠性,但仍然需要进行大量的实测验证和完善。
延伸阅读
当量直径分子式：CAS号：性质：也称为水力直径(hydran-lic diameter)。当流体在非圆形管内流动，如在套管的环隙中流过，则表征管的大小时既不能用内管的外径d1，也不能用外管的内径d2，需用当量直径de。对于湍流de的定义是：de=4×水力半径，水力半径为流体流过的截面面积除以该截面被流体润湿的周边。对于套管的环隙：对于长方形管道，设a与b分别是长方形内侧的两边，则。对于内径为d的圆管，则即当量直径就是内径。
