ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
In the present worh a closed loop circulation system consist of.three testing sections was designed and constructed. The testi-ng sections madefrom (3m) of commercial carbon steel pipe of diameters(5.08,2.54 and l'91 cm) ' Anionic sur1actani ISOBS )with ,inrrniotiori of (50, 100, 150, 200 and 250 ppm) was tested as a drag reducing agent. The additive6ny$sudied using crude oil from south of lraq. lhe/toy ytes of uude oil were used in 5.08 and 2.54 cm I'D' pipi oi, (t - t 2) ,stii ifiii, (t -O) mr/hr *"r, ,ttd in'1,9I im LD. pipe. Percentage drag reduction (%Dr) was found to increase by increasing solution vetocity, pipe diameter and additives concentration (i.e. increasing Renolds ry1mber). Also it was jound that ihere is no changein- apparent physical properties (viscosity) of crude oil after the addition of sDBS. The'higher value of drag reduition oi'slu ii 5.0s cm I.D. was observed using 250 ppm sDBS.surfactant dissolved in the used crude oilitflow rate of I2 m3/hr. Frictionfactor was calcutatedfrom experimental data. The frictionfacrors values for pure solienr lies near or at Blasius asymptote suggestedforflow.of Newtonian/luids, Aft?'-tlu addition of smatt o^ou,rt of SDBS, the friction factor valuei wbre positioned below Blasius asymptole toward Virk mmimum-drag reduction asymptote, which was never reached'