层流区 meaning in English
laminar area
zone， laminar
Examples
- The highest heat transfer coefficient for air flowing in the nine 3 - d ift with staggered arrangement fins is no9 tube
过渡流区和层流区的热力性能系数分别为2 . 74和1 . 06 。 - It will become less than the theoretic value and the difference between them will augment with the increase of reynolds numbers
表面粗糙度对层流区阻力特性影响明显，层流区摩擦系数低于理论值，且其偏差随雷诺数逐渐增大。 - The friction factor of laminar flow has decreased into about 3 / 4 of the theoretic value , and the static pressure distribution along the length was nonlinear
层流区摩擦系数约减小为常规理论值的3 4 ，沿程压力分布呈现非线性。在雷诺数较大时，可压缩性效应明显。 - For this regime , the heat transfer is usually predicted by the linear interpolation or extrapolation of the results of turbulent and / or laminar regimes , associated with great uncertainty in the evaluation of the performance of heat transfer
现阶段人们在实际计算中，往往采用线性内插法或延伸湍流区和层流区传热曲线的方法，从而使结果存在很大的不确定性。 - Moreover , this paper investigates the influences of surfactant aqueous solutions on flow characteristics of a mmc . sodium dodecyl sulphate aqueous solution and alkyl polyglycoside aqueous solution are used as working fluids . the experiment results indicate that the drag reduction depends on flow velocity and temperature ; the drag reduction effects aren ’ t very obvious in laminar flow region , but when fluid enter turbulent flow region , the drag reduction increase notably , the drag reduction effects
研究结果表明,阻力减小率( dragreduction , dr )与流速和温度有关;层流区内表面活性剂的减阻效果不是特别明显,但进入紊流区后减阻效果开始增强,尤其进入旺盛的紊流区后减阻效果大大增强;温度提升也可增加dr ,但在温度较高时添加sds后减阻效果的改善却不及apg 。