Effect of pumping chamber on performance of non-overload centrifugal pump

Abstract

In order to specify the characteristics of un-overloaded centrifugal pumps, the IH100-65-200 pump was chosen as the model pump. Different calculation models for centrifugal pumps were established under different pumping chamber sectional parameters. In the numerical simulation of the centrifugal pumps flow field, the shaft power, head, efficiency, and the changes of the internal flow field under different sectional areas and sectional shapes were studied with the RNG k-ε turbulence model, and the influence of the pumping chamber section characteristics of the non-overloaded centrifugal pumps were analyzed. The results show that sectional areas have a significant impact on the non-overload characteristics of centrifugal pumps. The shaft power and head of centrifugal pump are increasing with a lager sectional area, by which the gradient of head curves decreases. The efficiency is improved under a large flow rate condition, but the head and the efficiency are reduced at a small flow rate. It is also observed that the sectional shapes have less influence on the shaft power, the hydraulic performance and flow field characteristics of a centrifugal pump.

Keywords

centrifugal pumps / sectional area / sectional shape / non-overload characteristics / numerical simulation

References

[1] YuanS-q, CanW-l, LiS-y, JiangW-h, ZhangZ-x, JiangT-j, WeiS-lian. Theory and design method of non-overload centrifugal pumps [J]. Chinese Journal of Mechanical Engineering, 1992, 5(4): 252-260

[2] HuB, YuanS-q, LuW-g, YuanJ-p, LiLei. Optimal design of a non-overload centrifugal pump [J]. Advanced Materials Research, 20122357-2363

[3] CaridadJ, AsuajeM, KenyeryF, TremanteA, AguillonO. Characterization of a centrifugal pump impeller under two-phase flow conditions [J]. Journal of Petroleum Science and Engineering, 2008, 63: 18-22

[4] ShiW-d, JiangT, CaoW-d, LuW-g, ZhangD-s, ChenBin. Optimal design and experiment on a high-head non-overload submersible sewage pump [J]. Transactions of the Chinese Society of Agricultural Engineering, 2011, 27(5): 151-155

[5] ChoiY D, KurokawaJ, MalsuiJ. Performance and internal flow characteristics of a very low specific speed centrifugal pump [J]. Journal of Fluids Engineering, Transactions of the ASME, 2006, 128(2): 341-349

[6] Laguna-CamachoJ R, LewisR, Vite-TorresM, Mendez-MendezJ V. A study of cavitation erosion on engineering materials [J]. Wear, 2013, 301: 467-476

[7] StellaJ, GerkeL, PohlM. Study of cavitation erosion and adhesive wear in CuSnNi alloys produced by different casting process [J]. Wear, 2013, 303: 541-545

[8] GonzalezJ, ParrondoJ, SantolariaC, BlancoE. Steady and unsteady radial forces for a centrifugal pump with impeller to tongue gap variation[J]. Journal of Fluids Engineering, Transactions of the ASME, 2006, 128(3): 454-462

[9] SongJ W, RaheelM, EngedaA. Loss analysis and performance improvement of very low specific speed centrifugal pumps [J]. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2003, 217(11): 1241-1257

[10] Experimental studies on the optimization design of a low specific speed centrifugal pump [C], 2012, 15(6

[11] ZhangJ-f, YuanY, YuanS-q, LuW-g, YuanJ-pingExperimental studies on the optimization design of a low specific speed centrifugal pump [C], 2011JapanASME561-569

[12] ZhangF, YuanS-q, FuQ, HuB, TaoY, WangW-jieOptimization design and inner flow analysis on a medium-high specific speed centrifugal pump [C], 2013USAASME

[13] HuB, YuanS-q, LuW-g, LiT, GuoC-xuNumerical optimal design of a non-overload centrifugal pump [C], 2012USAASME427-433

[14] GuY-q, ZhaoG, ZhengJ-x, LiZ-y, LiuW-b, MuhammadF K. Experimental and numerical investigation on drag reduction of non-smooth bionic jet surface [J]. Ocean Engineering, 2014, 81: 50-57

[15] BarrioR, FemandezJ, BlancoE, ParrondoJ. Estimation of radial load in centrifugal pumps using computational fluid dynamics [J]. European Journal of Mechanics B: Fluids, 2001, 303): 316-324

[16] SongX-g, ParkJ H, KimS G, ParkY C. Performance comparison and erosion prediction of jet pumps by using a numerical method [J]. Mathematical and Computer Modeling, 2013, 57(1): 245-253

[17] TanL, ZhuB-s, CaoS-l, WangY-ming. Cavitation flow simulation for a centrifugal pump at a low flow rate [J]. Chinese Science Bulletin, 2013, 58(8): 949-952

[18] LiuX-m, LuJ, GaoR-h, XiGuang. Numerical investigation of the aerodynamic performance affected by spiral inlet and outlet in a positive displacement blower [J]. Chinese Journal of Mechanical Engineering, 2013, 26(5): 957-966

[19] GuY-q, ZhaoG, ZhengJ-x, WangF, LiZ-y, LiuW-b, ZhaoH-xing. Characteristics of drag reduction on coupling of jet surface main flow field velocity and jet velocity [J]. Journal of Central South University: Science and Technology, 2012, 43(12): 4713-4721

[20] GonzalezJ, SantolariaC. Unsteady flow structure and global variables in a centrifugal pump [J]. Journal of Fluids Engineering, Transaction of the ASME, 2006, 128(5): 937-946

[21] MontanteG, LeeK C, BrucatoA, YianneskisM. Numerical simulations of the dependency of flow pattern on impeller clearance in stirred vessels [J]. Chemical Engineering Science, 2001, 56(12): 3751-3370

[22] LiY-j, WangF-jun. Numerical investigation of performance of an axial-flow pump with inducer [J]. Journal of Hydrodynamics, 2007, 19(6): 705-711

[23] YuanS-qiTheory and design of low specific speed centrifugal pumps [M], 1997BeijingChina Machine Press140-168