壁面糙率 的英文怎麼說
中文拼音 [bìmiàncāolǜ]
壁面糙率
英文
wall roughness-
The turbulent flow in open channel is tested with laser - doppler anemometer, in which the longitudinal time average velocity and fluctuating velocity of turbulent flow in open channel under the conditions of the sudden changes of roughnesses at different water depths are measured
摘要通過激光測速儀,對壁面糙率突變時的明渠紊流進行試驗,測量了糙率突變不同水深情況下明渠紊流的縱向時均流速和脈動流速。Firstly, the influence of reaction time between laser and material on the roughness is studied by changing the speed of laser beam. secondaly, the optimized parameters are found by adjusting laser power and defocus
一方面,通過改變激光加工頭的運動速度,考察激光與晶元材料的相互作用時間對側壁表面粗糙度的影響;另一方面,調整激光的功率和離焦量,找出最優化參數。Based on the measured data, the change of the friction velocity of turbulent flow and the characteristics of the wall shear stress under different sudden roughnesses and different water depths are analyzed herein
通過實測資料分析不同糙率突變和不同水深的紊流摩阻流速變化情況和水流的壁面切應力的特點。
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