喷嘴内液固两相射流流场的数值模拟_王明波.pdfVIP

2005 年 第29 卷 石油大学学报( 自然科学版) Vol. 29 No. 5 第5 期 Jo rnal of the University of Petrole m, China Oct. 2005 : 1000-5870(2005) 05-0046-04 喷嘴内液固两相射流流场的数值模拟 王明波, 王瑞和 ( 中国石油大学 石油工程学院, 山东 东营 257061) : , , , k - , , , , ; , , , ; , , , , , ; , , , , , : ; ; ; :TE 248 :A Numeri cal simulation on f luid- parti cle two- phase j et flow fi el d i n nozzle WANG Ming-bo, WANG R -i he ( Colleg e of P etr ole um E ng ineer ing in China Univ ersity of Petroleum , Dongy ing 257061, China) Abstract: Based on the contin m theory , the control eq ations for the fl id-particle two-phase jet in t he nozzle w ere estab- lished in consideration of fl id-particle interact ions. The n merical sim lat ion was cond cted sing standard tw o-eq ation model, in which the main constants were optimized. The res lts show that there exists velocity slip between water and abrasive particles. Under the condition of inter-phase force, abrasive part icles are accelerated all the way which shows the inclination to follow the water. In the convergent section of the nozzle, both w ater and abrasive particles are accelerated and it takes a long time for abrasive particles to be accelerated beca se of the inertia force. In t he straight t be section of the nozzle, w ater contin es to be accelerated and reaches its maxim m velocity and then decreases slowly . Abrasive particles are accelerated all the way and the velocity difference between w ater and abrasive particles decreases. At the nozzle exit, the ve- locity profiles of water and abrasive particles are parabolic wit h maxim m velocities at the center and decrease in the radial direction. The more close to the w all, the more obvio s velocity decreases. Compared with former concl sions, the res