CAJ | 학술논문

分别用试验研究和数值模拟手段对离心泵内升力做功对其水力性能的影响展开了研究. 研究结果表明:离心泵叶轮在相同半径下,叶片工作面的压力与吸力面之间存在压力差ΔP,由此产生升力,且随着流量的增加升力做功逐渐减小;离心泵内升力做功和离心力做功共同决定着其外特性曲线,其中,升力做功最大可达到离心力做功的90%左右,占总扬程的46%左右;在不同工况下,离心力做功基本不变,升力做功的变化则较为明显,这就决定了其外特性曲线的变化趋势. 对理论计算与试验结果进行了比较,两种结果相互吻合,验证了数值模拟的正确性.
분별용시험연구화수치모의수단대리심빙내승력주공대기수력성능적영향전개료연구. 연구결과표명:리심빙협륜재상동반경하,협편공작면적압력여흡력면지간존재압력차ΔP,유차산생승력,차수착류량적증가승력주공축점감소;리심빙내승력주공화리심력주공공동결정착기외특성곡선,기중,승력주공최대가체도리심력주공적90%좌우,점총양정적46%좌우;재불동공황하,리심력주공기본불변,승력주공적변화칙교위명현,저취결정료기외특성곡선적변화추세. 대이론계산여시험결과진행료비교,량충결과상호문합,험증료수치모의적정학성.
To study the influence of the work done by lifting force in centrifugal pumps on its hydraulic performance, the ex-perimental research and numerical simulation are carried out. It is found that the pressure gap between the pressure side and the suction side exists on the blade of the centrifugal pump with impellers of the same radius, which generates a lifting force, and the work done by lifting force decreases with the increase of the flow. The co-work done by lifting force and centrifugal force deter-mine the external characteristic curve of the pump, in the process the lifting force work could account for up to 90% of the cen-trifugal force work, and 46% of the total lift of the pump. In different operating conditions, the work done by centrifugal force generally stays stable while the work done by lifting force varies considerably, which determines the variation tendency of the ex-ternal characteristic curve. The results of theoretical calculation and experimental research are compared and found to tally with each other, which in turn proves the correctness of the numerical simulation.