CAJ | 학술논문

为了适应船用泵的发展及使用条件,研制开发新型高效船用冷却泵,对CB80-65-125型船用泵进行了技术改造,并采用了FLUENT模拟泵内流场,进行优化改型设计.改进的新型船用冷却泵,叶轮叶片向吸入口前伸并剪薄,减小了进口直径.对改进设计后的泵,用Pro/E建立该泵内部流道的三维物理模型,采用标准k-ε模型、SIMPLEC算法,数值模拟并分析了泵设计工况点下叶轮进口附近流场、静压分布的均匀性及叶轮几何参数对泵性能的影响.试验结果表明,新型船用冷却泵设计合理,流道内流动、静压分布及相对速度的扩散都比较均匀,没有明显的漩涡及边界层分离现象;泵效率达到67.9%,比原型泵效率提高了4.4%;扬程达到20.8 m;结构简单,重量轻.另外,改进设计方法也可提高泵的抗汽蚀性能.
위료괄응선용빙적발전급사용조건,연제개발신형고효선용냉각빙,대CB80-65-125형선용빙진행료기술개조,병채용료FLUENT모의빙내류장,진행우화개형설계.개진적신형선용냉각빙,협륜협편향흡입구전신병전박,감소료진구직경.대개진설계후적빙,용Pro/E건립해빙내부류도적삼유물리모형,채용표준k-ε모형、SIMPLEC산법,수치모의병분석료빙설계공황점하협륜진구부근류장、정압분포적균균성급협륜궤하삼수대빙성능적영향.시험결과표명,신형선용냉각빙설계합리,류도내류동、정압분포급상대속도적확산도비교균균,몰유명현적선와급변계층분리현상;빙효솔체도67.9%,비원형빙효솔제고료4.4%;양정체도20.8 m;결구간단,중량경.령외,개진설계방법야가제고빙적항기식성능.
A CB80-65-125 ship cooling pump was reformed to improve the limitations of the application conditions. FLUENT software was used to simulate the flow field for the optimization. The new type ship cooling pump was designed with thinner leaf blade with extended inlet, and smaller inlet diameter. The three-dimensional inner flow model was built in Pro/E.A simulation was performed to analyze the flow around the impeller inlet, to study the effects of geometry parameters of impeller on the hydraulic performance at the rated point, by using SIMPLEC algorithm and standard k-ε turbulence model. The experimental results indicate that the static pressure distribution and the relative velocity diffusion are uniform, and there is no obvious swirl and boundary-layer separation. So the design is reasonable. The efficiency of the new type ship cooling pump achieves to 67.9%, 4.4 percent higher than the old one. The head is 20.8 m. The pump is relatively simple in structure and light in weight. Besides, the developed pump can also improve the cavitation resistance of the pump.