resistance coefficient 阻力系数 ; 电阻系数 ; 阻抗系数 ; 沿程阻力系数 virial coefficient 位力系数 ; 维里系数 ; 均功系数 ; 维利系数 ..
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鉴于紊流运动的复杂性，其沿程阻力系数确定起来较为困难。
Because of the complexity of turbulent flow, it is a tough issue to determine its friction factor.
应用几种不同的湍流模型，模拟计算水力光滑管的沿程阻力系数。
Friction loss factors of hydraulically smooth pipes have been calculated by using several different turbulent models.
对交叉缩放椭圆管进行了实验和数值研究，给出了换热和沿程阻力系数实验拟合关联式。
An experimental and numeric study was carried out for the alternating elliptical axis tubes. The fitted correlation was derived for the experimental heat transfer and resistance coefficients.
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