CAJ | 학술논문

基于三维不可压缩流体N－S方程和RNGκ－ε湍流模型，对混流式核主泵叶轮水力模型的能量性能进行了数值预测，研究了不同叶片厚度及其分布规律对混流叶轮模型水力性能的影响。通过分析叶轮叶片压力面、吸力面的静压分布，获得叶片表面的载荷分布及其变化规律。结果表明：随着叶轮叶片厚度减薄，最高效率值有所增大且高效点向大流量工况偏移；当叶片最厚处位置在靠近进口边约1／3处时，叶轮水力效率值最大；随着叶片最厚位置由进口向出口移动时，最高效率点向大流量工况偏移。
기우삼유불가압축류체N－S방정화RNGκ－ε단류모형，대혼류식핵주빙협륜수력모형적능량성능진행료수치예측，연구료불동협편후도급기분포규률대혼류협륜모형수력성능적영향。통과분석협륜협편압력면、흡력면적정압분포，획득협편표면적재하분포급기변화규률。결과표명：수착협륜협편후도감박，최고효솔치유소증대차고효점향대류량공황편이；당협편최후처위치재고근진구변약1／3처시，협륜수력효솔치최대；수착협편최후위치유진구향출구이동시，최고효솔점향대류량공황편이。
Based on the three dimensional incompressible Navier-Stokes equation and RNG κ-εturbulent model ,energy per-formance of mixed-flow nuclear main pump impeller hydraulic model was numerically predicted and the influence of the blade thickness and distribution of mixed-flow nuclear main pump impeller model on hydraulic performance was studied .Through analy-zing the static pressure on impeller blade pressure surface and the suction side and the load distribution of mixed -flow pump im-peller blade ,the study revealed the main variation characteristics of the load on blade surface .The results show:with the impeller blade thickness being thin ,the highest efficiency value gets increased and efficient points to offset heavy traffic conditions ;When the thickest blade position locates at about 1/3 part of imports edge ,the values of impeller hydraulic efficiency is the highest;As the thickest blade ’ s location moving from enter port to exit ,the highest efficiency point offset to the heavy traffic conditions .