当代化工
噹代化工
당대화공
CONTEMPORARY CHEMICAL INDUSTRY
2015年
5期
1082-1084,1089
,共4页
自转公转%偏心环空%动网格%数值模拟
自轉公轉%偏心環空%動網格%數值模擬
자전공전%편심배공%동망격%수치모의
Rotation and revolution%Eccentric annulus%Dynamic mesh%Numerical simulation
应用非牛顿流体在内管自转且公转的环空中流动的数学模型，对仅有内管自转的偏心环空螺旋流和流体在内管自转且公转的环空中的流动分别进行了模拟计算。结果表明：内管公转使流体周向运动区域更大，流体有阻止内管公转并将内管向环空内侧推回的趋势，环空内湍流高粘度区发生与内管自转方向相同的旋转偏移，内管自转与公转转向相反会使得流体周向速度受到削弱并形成涡流，二次流区域将变大。
應用非牛頓流體在內管自轉且公轉的環空中流動的數學模型，對僅有內管自轉的偏心環空螺鏇流和流體在內管自轉且公轉的環空中的流動分彆進行瞭模擬計算。結果錶明：內管公轉使流體週嚮運動區域更大，流體有阻止內管公轉併將內管嚮環空內側推迴的趨勢，環空內湍流高粘度區髮生與內管自轉方嚮相同的鏇轉偏移，內管自轉與公轉轉嚮相反會使得流體週嚮速度受到削弱併形成渦流，二次流區域將變大。
응용비우돈류체재내관자전차공전적배공중류동적수학모형，대부유내관자전적편심배공라선류화류체재내관자전차공전적배공중적류동분별진행료모의계산。결과표명：내관공전사류체주향운동구역경대，류체유조지내관공전병장내관향배공내측추회적추세，배공내단류고점도구발생여내관자전방향상동적선전편이，내관자전여공전전향상반회사득류체주향속도수도삭약병형성와류，이차류구역장변대。
The mathematical model of non-Newtonian fluid flow in the annulus whose inner tube rotates and revolves simultaneously was established. Eccentric annulus flow while inner tube only rotates and eccentric annulus flow while inner tube rotates and revolves simultaneously were simulated. The results show that: the revolution of inner tube can make fluid motion area greater, the fluid prevent the inner tube from revolving and push the inner tube back to inside of the annulus. Area of high turbulent viscosity moves rotationally at the same direction as the rotation of the inner tube. If the directions of rotation and revolution of inner tube are opposite, velocity of fluid would decrease ,and vortex would appear, the area of secondary flow would increase, too.
