1) friction resistance factor
摩擦阻力因数
1.
Solving process of friction resistance factor by Celebrook formula and selection of initial value are discussed, and programming calculation of branch courtyard gas pipeline supplying less than two thousand householder is studied.
探讨了柯列勃洛克公式摩擦阻力因数的解法和初值的选取,研究了2000户以下庭院枝状燃气管道的编程计算。
2) friction factor
摩擦阻力系数
1.
The variation of pressure drop with mean velocity,the variation of friction factor and the variation of apparent viscosity with Reynolds number were obtained.
实验研究了由正十四烷和尿素甲醛树脂制成的相变微胶囊和水混合制成的潜热型功能流体在流过恒热流圆管进行对流换热时的流动阻力特性,获得了压降随流速的变化关系、摩擦阻力系数和表观黏度随R e的变化关系。
2.
The friction factor,heat flux and Nusselt number were calculated.
通过测量流量、进出口压力和温度等参数,获得了流体流过微通道时的摩擦阻力系数、对流换热过程中的热流通量和N u等。
3.
This article analyses the drop characteristics and calculating methods for friction factorλo.
本文在分析了大量纯空气和气固两相流在水平管道内流动时摩擦阻力系数人人的计算方法的基础上，结合我们在大型电站锅炉送粉管道中所做的试验，通过分析回归得出了计算送粉管道摩擦阻力系数λμ的经验公式。
3) coefficient of frictional resistance
摩擦阻力系数
1.
Applying BP neural network model to calculate coefficient of frictional resistance of roadways;
利用BP神经网络确定巷道摩擦阻力系数
2.
The standard value of ventilation resistance and coefficient of frictional resistance is very significant to the ventilation management of the mine as the basic data.
标准风阻值和标准摩擦阻力系数值作为矿井通风技术管理的基本资料对矿井通风管理具有重要意义。
4) internal frictional res istance coefficient
内摩擦阻力系数
6) Frictional Resistance
摩擦阻力
1.
Influence of the frictional resistance for deadline anchor axis on weight indicator accuracy;
死绳固定器轴上摩擦阻力对指重表精度的影响
2.
Influences of frictional resistance on flow distributions of the dividing and combining manifolds;
摩擦阻力对分流和汇流联箱流量特性影响
3.
A method for lateral buckling analysis of tubing with frictional resistance in deviated wells was presented.
提出了在斜直井中钻柱正弦屈曲分析时对摩擦阻力的处理方法,给出了考虑摩擦阻力时的屈曲平衡方程,建立了相应的微分求积法列式,用微分求积法时平衡方程直接求解。
补充资料：风流摩擦阻力
风流摩擦阻力
friction resistance of airflow
卞engi一u moeo zull风流摩擦阻力(frietion resistanee of airflow) 风流与井巷周壁间摩擦和风流微团或流层间摩擦所产生的切应力。风流以层流状态沿井巷流动时，摩擦阻力与平均风速的一次方成正比;风流以稳定紊流状态沿井巷流动时，摩擦阻力与平均风速的二次方成正比。矿内风流多属稳定紊流，摩擦阻力等于井巷风阻与风量平方之积: 凡一尺fQZ _a尸L R一‘汁于二 S3式中hf为紊流摩擦阻力，Pa;尺f为井巷的摩擦风阻，N‘52/m“，其值取决于井巷的几何尺寸和周壁的粗糙度，与风量无关;Q为流过的风量，m“，/s;尸为井巷净断面的周边长，m;L为井巷的长度，m;S为井巷净断面面积，mZ;a为井巷摩擦阻力系数，N·52/m书。井巷摩擦阻力系数，是由井巷周壁的粗糙度和流过井巷空气的密度所决定的常数。混凝土砌碳的巷道，。为。，。。4一0.。。8，无支护巷道为0.008~。.016，木棚和其他棚架支护巷道为0.016一。.024，有装备物的井筒为().024~0.050。 (陈旺星)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条