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| Numerical design of an axial flow pump by means of parametric design, stress field and modal characteristics analysis |
| Received:August 26, 2014 Revised:December 14, 2014 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201601019 |
| KeyWord:axial pump CFD calculation stress analysis modal analysis parametric design |
| Author | Institution |
| 彭敏 |
武汉工商学院 信息工程学院, 武汉 |
| 杨琼方 |
海军工程大学 动力工程学院, 武汉 |
| 陈志敏 |
海军工程大学 科研部, 武汉 |
| 程辛 |
海军工程大学 动力工程学院, 武汉 |
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| Abstract: |
| A numerical design method for axial waterjet pump of ship accounting for parametric design, hydrodynamics, static strength and structural acoustic characteristic has been developed.Impeller blade is designed by lifting line method, wherein the vane blade using streamline design method.The three-dimensional blade modeling is completed by NUMECA parametric design system.Viscous CFD calculation is used to validate the pump's hydrodynamics, including head, power and efficiency under design condition, and output the distributed hydrodynamic load on blades at the same time.Static strength analysis is focused on stress and deformation on blades by ANSYS finite element method (FEM) calculation accounting for the hydrodynamic load, gravity load and centrifugal force load.In addition, the modal deformation and frequency of the designed pump is calculated in NASTRAN software.Results show that, the head and power of the designed axial pump is acceptable compared with design value, and the efficiency up to 87.13%.The largest deformation of impeller blade is ignorable compared to the blade tip gap.Local stress concentration exists on impeller blade, but its amplitude meeting the requirement of static strength.The forth modal deformations shape well with engineering experience, and the frequencies are far away with axial passage frequency (APF), blades passage frequency (BPF) and their harmonics, which is beneficial to suppress the resonant phenomenon. |
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