CAJ | 학술논문

采用多块拓扑结构和八叉树格式构建的混合网格，通过数值计算对某型诱导轮与叶轮一体式离心泵内流场性能进行了分析研究，仿真结果表明：不同计算工况下仿真数据与试验数据扬程值误差小于1％、效率值误差小于5％，即所使用的数值方法能够准确地模拟该型离心泵性能和内流场。进一步的仿真分析表明：一体式叶轮进口长度较大使得各个流量工况下离心泵叶轮内压力有明显的非对称性；隔舌处叶轮通道内压力变化最为剧烈，且在大流量工况下压力低于其它流量压力；叶片压力侧固定位置处有低速团的产生，叶片背力侧入口附近也容易产生低速流团。
채용다괴탁복결구화팔차수격식구건적혼합망격，통과수치계산대모형유도륜여협륜일체식리심빙내류장성능진행료분석연구，방진결과표명：불동계산공황하방진수거여시험수거양정치오차소우1％、효솔치오차소우5％，즉소사용적수치방법능구준학지모의해형리심빙성능화내류장。진일보적방진분석표명：일체식협륜진구장도교대사득각개류량공황하리심빙협륜내압력유명현적비대칭성；격설처협륜통도내압력변화최위극렬，차재대류량공황하압력저우기타류량압력；협편압력측고정위치처유저속단적산생，협편배력측입구부근야용역산생저속류단。
With the development of the aero engine control technique, aero fuel centrifugal pump with combination inducer and impeller meet the requirements better than the divided pump. This paper established the hybrid network of the centrifugal pump which adopted multi?block topology structure and octree format, analyzed the internal flow field performance of the pump based on numerical simulation. The simulation datas compared with test datas show that under different calculation conditions, head error of the simulation data and experimental data is less than 1%, and the efficiency value of error is less than 5%. The simulation method can accurately calculate the performance of the pump. The simulation analysis shows that the asymmetry of the impeller internal pressure is appreciable under different flow conditions because of the inlet length, under other small flow conditions. The most dramatic change is the pressure in the impeller channel, and the pressure under large flow conditions is lower than that under other flow conditions. In fixed location of the pressure side, there may produce low speed flow group, the situation is the same as in the entrance to the attachment of back pressure side.