常見例句The MHD control of drag reduction in pipe flow is studied through DNS. 利用直接數(shù)值模擬研究了圓管湍流減阻的電磁力控制問題。Drag reduction with W/O polyacrylamide latex(PAM)in water was studied in thispaper. 研究了W/O型聚丙烯酰胺(PAM)膠乳在水中的涼阻性能。The new type of rheology controller has its application potential in drilling, Enhanced Oil Recovery (EOR) and liquid transportation drag reduction. 這種新型流變控制劑在鉆井、提高采收率以及流體輸送減阻中具有潛在應(yīng)用價(jià)值。The drag reduction of the notchback car platoon is the most, that of the squareback is the next, and the fastback is the least. 階背式轎車隊(duì)列的平均減阻率最大,直背式次之,快背式最小。The pour point depressant(PPD)and drag reduction agent(DRA)play a key role in the oil transportation in Kelamayi Oilfield. “兩劑”(降凝劑和減阻劑)在克拉瑪依油田原油外輸中發(fā)揮了非常重要的作用。Based on theoretical analysis, microbubble drag reduction is due to structure change of turbulent boundary layer caused by the microbubbles. 理論分析提出微氣泡降阻機(jī)理在于其引起湍流邊界層結(jié)構(gòu)的變化; 返回 drag-reduction