Laboratory Measurements the Rise in Power Consumption Resulting from the Use of a Finned Rotating Disc at a Centrifugal Water Flow
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering - Tập 43 - Trang 773-782 - 2018
Tóm tắt
The pump structure may involve using fins on the impeller discs to reduce axial thrust. The fins are also used to reduce pressure acting on the discharge-side stuffing box, throw mechanical impurities away and protect the seal against mechanical impurities at the pump impeller inlet. Extensive laboratory tests were performed on finned discs at the water centrifugal flow for different fin widths and gaps between fins and the casing and for different water flow rates. The resulting change in power consumption was determined compared to unfinned discs. The analysis results indicate that fitting the disc with fins involves an increase in power consumption. The consumption rise depends on the centrifugal volumetric flow rate, the fin width and the size of the gap. The dependence of power consumption on the gap size is non-monotonic—the gap can be optimized to minimize power consumption. The determination of the rise in the consumption of power resulting from fitting the disc with fins and depending on the centrifugal volumetric flow rate is an original outcome of the analysis presented in this paper. The dependence was defined for fins with different values of width and for different sizes of gap. The presented results of the testing can be used in the analysis of power consumption of both finned and unfinned rotating discs. The analysis of power consumption in the impeller pump axial thrust balancing system using balancing vanes is another example of the application of the obtained results.
Tài liệu tham khảo
Antoszewski B (2012) Mechanical seals with sliding surface texture—model fluid flow and some aspects of the laser forming of the texture. Procedia Eng 39:51–62. https://doi.org/10.1016/jproeng.2012.07.007
Ayad AF, Abdalla HM, Abou El-Azm A (2016) Study of the effect of impeller side clearance on the centrifugal pump performance using CFD. In: ASME international mechanical engineering congress and exhibition IMECE2015, vol 7A, Article number: UNSP V07AT09A037
Bhatia A (2014) Theoretical analysis to calculate axial thrust in multistage centrifugal pumps. In: 12th European fluid machinery congress
Cao L, Zhang YY, Wang ZW, Xiao YX, Liu RX (2015) Effect of axial clearance on the efficiency of a shrouded centrifugal pump. J Fluids Eng 137(7):071101. https://doi.org/10.1115/1.4029761
Cao L, Wang ZW, Xiao YX, Luo YY (2016) Numerical investigation of pressure fluctuation characteristics in a centrifugal pump with variable axial clearance. Int J Rotating Mach. https://doi.org/10.1155/2016/930614
Daily J, Nece R (1960a) Chamber dimension effects on induced flow and frictional resistance of enclosed rotating disks. Trans ASME J Basic Eng 82(1):217–230
Daily J, Nece R (1960b) Roughness effects on frictional resistance in enclosed rotating disks. Trans ASME J Basic Eng 82(3):553–560
Daqiqshirazi M, Riasi A, Nourbakhsh A (2014) Numerical study of flow in side chambers of a centrifugal pump and its effect on disk friction loss. Int J Mech Prod Eng 2(3):23–27
Dong W, Chu W (2016a) Analysis of flow characteristics and disc friction loss in balance cavity of centrifugal pump impeller. Trans Chin Soc Agric Mach. https://doi.org/10.6041/j.issn.1000-1298.2016.04.005
Dong W, Chu W (2016b) Numerical analysis and validation of fluid pressure in the back chamber of centrifugal pump. J Mech Eng. https://doi.org/10.3901/jme.2016.04.165
Dykas S, Wilk A (2008) Determination of the flow characteristic of the high-rotational centrifugal pump by means of CFD methods. TASC Q 12(3–4):245–253. http://www.task.gda.pl/files/quart/TQ2008/03-04/tq312l-e.pdf
El-Naggar M (2013) A one-dimensional flow analysis for the prediction of centrifugal pump performance characteristics. Int J Rotating Mach. https://doi.org/10.1155/2013/473512
Gantar M, Florjancic D, Sirok B (2002) Hydraulic axial thrust in multistage pumps—origins and solutions. J Fluids Eng 124(2):336–341. https://doi.org/10.1115/1.1454110
Godbole V, Patil R, Gavade S (2012) Axial thrust in centrifugal pumps—experimental analysis. In: 15th international conference on experimental mechanics, ICEM, Paper Ref: 2977
Golovin VA, Kochevskii NN, Biryukov AI et al (1989) Calculation of prerotation in a rotating disk during radial flow. Sov Energy Technol 29–33
Gulich J (2014) Centrifugal pumps. Springer, Berlin
Hong F, Yuan J, Heng Y et al (2013) Numerical optimal design of impeller back pump-out vanes on axial thrust in centrifugal pumps. In: ASME 2013 fluids engineering division summer meeting. Paper No. FEDSM2013-16598. https://doi.org/10.1115/fedsm2013-16598
Iino T, Sato H, Miyashiro H (1980) Hydraulic axial thrust in multistage centrifugal pumps. J Fluids Eng 102(1):64–69. https://doi.org/10.1115/1.3240626
ISO/IEC Guide 98-3 (2008) (JCGM/WG1/100) Urcentainty of measurement - Part 3: guide to expression of uncertainty in measurement (GUM:1995). International Organization for Standardisation ISO. www.iso.org. Accessed 3 Jan 2018
Jedral W (2001) Impeller pumps. PWN, Warszawa
Jia X, Guo F, Huang L et al (2014) Effects of the radial force on the static contact properties and sealing performance of a radial lip seal. Sci China Tech Sci 57:1175–1182. https://doi.org/10.1007/s11431-014-5548-7
Kalinichenko P, Suprun A (2012) Effective modes of axial balancing of centrifugal pump rotor. Procedia Eng 39:111–118. https://doi.org/10.1016/jproeng.2012.07.014
Karaskiewicz K (2013) Studies of flows in rotodynamic pumps for hydraulic forces prediction. Warsaw University Publishing House, Warsaw
Kim E, Palazzolo A (2016) Rotordynamic force prediction of a shrouded centrifugal pump impeller—part I: numerical analysis. J Vib Acoust 138(3):031014. https://doi.org/10.1115/1.4032722
Lazarkiewicz S, Troskolanski A (1965) Impeller pumps. Pergamon Press, Oxford
Lefor D, Kowalski J, Herbers T, Mailach R (2015) Investigation of the potential for optimization of hydraulic axial thrust balancing methods in a centrifugal pump. In: 11th European conference on turbomachinery fluid dynamics and thermodynamics ETC11
Liu G, Du Q, Liu J et al (2016) Numerical investigation of radial inflow in the impeller rear cavity with and without baffle. Sci China Tech Sci. https://doi.org/10.1007/s11431-015-5972-3
Lugova S, Matvieieva H, Rudenko A, Tvardokhleb I (2014) Determination of static and dynamic component of axial force in double suction centrifugal pump. Appl Mech Mater 630:13. https://doi.org/10.4028/www.scientific.net/AMM.630.13
Matsui J, Mugiyama T (2009) Effect of J-Groove on the axial thrust in centrifugal pump. In: 10th Asian international conference on fluid machinery
Nemdili A, Hellmann D (2007) Investigations on fluid friction of rotational disks with and without modified outlet sections in real centrifugal pump casings. Forsch Ingenieurwes 71(1):59–67
Owen J, Pincombe J (1980) Velocity measurements inside a rotating cylindrical cavity with a radial outflow of fluid. J Fluid Mech 99(1):111–127
Pfleiderer C (1961) Die Kreiselpumpen. Springer, Berlin
Piesche M (1989) Investigation of the flow in the impeller-side space of rotary pumps with superimposed throughflow for the determination of axial force and frictional torque. Acta Mech 78:175–189
Rohatgi U, Reshotko E (1974) Analysis of laminar flow between stationary and rotating disks with inflow. NASA Report No. CR-2356
Shimura T, Matsui J, Kawasaki S et al (2012) Internal flow and axial thrust balancing of a rocket pump. J Fluids Eng 134(4):41103. https://doi.org/10.1115/1.4006470
Stepanoff A (1957) Centrifugal and axial flow pumps. Wiley, New York
Torabi R, Nourbakhsh SA (2016) The effect of viscosity on performance of a low specific speed centrifugal pump. Int J Rotating Mach. https://doi.org/10.1155/2016/3878357
Wang C, Shi WD, Zhang L (2013) Calculation formula optimisation and effect of ring clearance on axial force of multistage pump. Math Probl Eng. https://doi.org/10.1155/2013/749375
Wang Z, Gao B, Yang L, Du WQ (2016) Influence of clearance model on numerical simulation of centrifugal pump. Mater Sci Eng. https://doi.org/10.1088/1757-899x/129/1/012020
Watanabe T, Furukawa H, Fujisawa S et al (2016) Effect of Axial Clearance on the Flow Structure around a Rotating Disk Enclosed in a Cylindrical Casing. J Flow Control Meas Vis 4:1–12. https://doi.org/10.4236/jfcmv.2016.41001
Wilk A (2003a) The analysis of the impeller discs friction losses in high speed impeller pumps. In: IX international conference on rotary fluid flow machines, Rzeszów, Poland, pp 307–213
Wilk A (2003b) Analysis of balancing the axial thrust with the relieving blades in rotational pumps for high rotational speed. J Transdiscipl Syst Sci 8:520–527
Wilk A (2008) Pressure distribution around pump impeller with radial blades. In: 6th IASME/WSEAS international conference on fluid mechanics and aerodynamics FMA. http://www.wseas.us/e-library/conferences/2008/rhodes/fma/fma33.pdf. Accessed 3 Jan 2018
Wilk A (2009) Laboratory investigations and theoretical analysis of axial thrust problem in high rotational speed pumps. WSEAS Trans Fluid Mech 4(1):1–13. http://www.wseas.us/e-library/transactions/fluid/2009/28-372.pdf. Accessed 3 Jan 2018
Wilk S, Wilk A (1996a) Tests of influence of impeller inlet sealing type on parameters of pump for hydraulic transport. WSI Opole Res Bull 43(218):293–296
Wilk A, Wilk S (1996b) Testing of the effect which relieving radial blades have on power loss and pressure distribution. Pumpentagung Pump Congress, Karlsruhe, Germany 1996, P/C2-4, pp 1–8
Wilk A, Wilk S (2001) Influence of relieving blades on pressure in stuffing-box of rotodynamic pump. In: 16th scientific conference problems of working machines development
Zhou L, Shi W, Li W et al (2013) Numerical and experimental study of axial force and hydraulic performance in a deep-well centrifugal pump with different impeller rear shroud radius. J Fluids Eng 135(10):104501. https://doi.org/10.1115/1.4024894