Numerical investigation of the inner flow in a centrifugal pump at the shut-off condition

• Autorzy: Liu H. , Wu X , Tan M.
• Języki publikacji: EN

Abstrakty

EN

The unsteady flow fields in a centrifugal pump at the shut-off condition (SOC) are simulated by the Unsteady Reynolds Averaged Navier-Stokes (URANS) approach. To improve simulation accuracy and assign the boundary condition, special 3D models are made. Three-dimensional URANS equations are solved on high-quality unstructured grids with the shear stress transport turbulence model by using the computational fluid dynamics (CFD) code CFX-11.0. Furthermore, the numerical simulation results are validated by particle image velocimetry (PIV) measurements. The main goal of the study is, on one hand, the validation of the numerical procedure proposed, and on the other hand, the detailed analysis of the unsteady inner flow field distribution and pressure fluctuation in the centrifugal pump at SOC. In addition, the head of the pump at SOC is predicted based on CFD results. The flow analysis indicates that there exists two eddies in each impeller flow passage, and the velocity at the volute diffusion part is very low. The amplitudes of pressure fluctuation at ƒr (impeller rotation frequency) and 3ƒr dominate in the impeller, while the pressure fluctuation at ƒb (blade passing frequency) is dominant in the volute.

Słowa kluczowe

EN

centrifugal pump; numerical simulation; shut-off condition; PIV

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2013
• Tom: Vol. 51 nr 3
• Strony: 649--660
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Liu H.

• Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu, China

autor

Wu X

• Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu, China

autor

Tan M.

• Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu, China

Bibliografia

• 1. Benra F.-K., Dohmen H.J., Sommer M., 2006, Flow field visualization of a single-blade centrifugal pump using PIV-method – comparison to numerical results, Journal of Visualization, 9, 4, 358-358
• 2. Dong L., Liu H.-L., Tan M.-G., et al., 2010, Study on key issues of the whole flow field numerical simulation for centrifugal pump, Proceedings of the 2010 International Conference on Pumps and Fans, October 18-21, Hangzhou China
• 3. Dyson G., Teixeira J., 2009, Investigation of closed valve operation computaional fluid dynamics, Proceedings of the ASME 2009 Fluids Engineering Division Meeting, August 2-6, Vail, Colorado, USA
• 4. Dyson G., Teixeira J., Ivey P.C., 2004, Closed valve flow field investigation using computational fluid dynamics, 2004 ImechE Event Publications, 130, 1-16
• 5. Guan X., 2011, Theory and Design for Modern Pumps, Yuhang Press, Beijing [in Chinese]
• 6. José G., Parrondo J., Santolaria C., et al., 2006, Steady and unsteady radial forces for a centrifugal pump with impeller to tongue gap variation, Journal of Fluids Engineering, 128, 454-462
• 7. José G., Santolaria C., 2006, Unsteady flow structure and global variables in a centrifugal pump, Journal of Fluids Engineering, 128, 937-946
• 8. Liu H.L., Wang K., Yuan S.Q., et al., 2012, 3D PIV test of inner flow in a double blade pump impeller, Chinese Journal of Mechanical Engineering, 25, 3, 491-497
• 9. Lucius A., Brenner G., 2010, Unsteady CFD simulation of a pump in part load conditions Rusing scale-adaptive simulation, International Journal of Heat and Fluid Flow, 31, 1113-1118
• 10. Muggli F.A., Holbein P., Dupont P., 2002, CFD Calculation of a mixed flow pump characteristic from shutoff to maximum flow, Journal of Fluids Engineering, 124, 798-802
• 11. Short T.D., Oldach R., 2003, Solar powered water pumps: the past, the present – and the future, Journal of Fluids Engineering, 125, 1, 76-82
• 12. Westra R.W., Broersma L., van Andel K., et al., 2010, PIV measurements and CFD computations of secondary flow in a centrifugal pump impeller, Journal of Fluids Engineering, 132, 6, 061104-8
• 13. Yuan S., Fu Q., Zhu R., 2010,Multi-operating- condition hydraulic design of centrifugal charging pump for nuclear power plant, Journal of Drainage and Irrigation Machinery Engineering, 28, 3, 185-189 [in Chinese with English abstract]