词语大全 層流區的英文
Posted 摩擦
篇首语：满堂花醉三千客，一剑霜寒十四州。本文由小常识网(cha138.com)小编为大家整理，主要介绍了词语大全 層流區的英文相关的知识，希望对你有一定的参考价值。
词语大全 層流區的英文
The highest heat transfer coefficient for air flowing in the nine 3 - d ift with staggered arrangement fins is no9 tube
過渡流區和層流區的熱力性能系數分別為2 . 74和1 . 06 。
It will bee less than the theoretic value and the difference beeen them will augment with the increase of reynolds numbers
表面粗糙度對層流區阻力特性影響明顯，層流區摩擦系數低于理論值，且其偏差隨雷諾數逐漸增大。
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 nonpnear
層流區摩擦系數約減小為常規理論值的3 4 ，沿程壓力分布呈現非線性。在雷諾數較大時，可壓縮性效應明顯。
For this regime , the heat transfer is usually predicted by the pnear 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
現階段人們在實際計算中，往往采用線性內插法或延伸湍流區和層流區傳熱曲線的方法，從而使結果存在很大的不確定性。
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
研究結果表明,阻力減小率( dragreduction , dr )與流速和溫度有關;層流區內表面活性劑的減阻效果不是特別明顯,但進入紊流區后減阻效果開始增強,尤其進入旺盛的紊流區后減阻效果大大增強;溫度提升也可增加dr ,但在溫度較高時添加sds后減阻效果的改善卻不及apg 。
The flow characteristics of laminar flow in different width - height ratio ( the height stayed at 1 . 0mm ) also varied , which were determined by the characteristic scale ( such as equivalent diameter ) . pared with the laminar theoretic value , the experimental friction factor reduced when the scale dropped down
橫截面寬高比(高度1 . 0mm )不同，微小通道在層流區的流動特性也有所不同，微小通道流動特性取決于通道特征尺度(如：當量直徑)的大小，摩擦系數隨尺度減小而減小。
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