Abstract
As explained in Chap. 5, the flow at the impeller outlet is non-uniform. The diffuser vanes or volute cutwaters are thus approached by an unsteady flow. The flow in the stator acts back on the velocity field in the impeller. The related phenomena are called “rotor/stator interaction” (RSI). As a consequence of the RSI, hydraulic excitation forces are generated. These give rise to pressure pulsations, mechanical vibrations and alternating stresses in various pump components. The vibrations transmitted to the foundations spread as solid-borne noise throughout the building. The pressure pulsations excite the pump casing to vibrations. They travel as fluid-borne noise through the piping system, where they generate vibrations of the pipe walls. The vibrating walls and structures radiate air-borne noise.
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Notes
- 1.
Examples for the influence of the system on pressure pulsations can be found in [B.20]. The topic is discussed in more detail also in Sect. 10.12.3.
- 2.
The measurement is done according to DIN 45635, [N.19] and ISO standards.
- 3.
As per [N.25] high-energy pumps are defined as pumps whose heads per stage exceeds.\(\frac{{{\text{H}}_{\text{st,opt}}}}{{{\text{H}}_{\text{Ref}}}}>275{{\left(\frac{{{\text{n}}_{\text{q,Ref}}}}{{{\text{n}}_{\text{q}}}}\right)}^{1.85}}\left( \frac{{{\text{ }\!\!\rho\!\!\text{}}_{\text{Ref}}}}{\text{ }\!\!\rho\!\!\text{ }} \right)\) with nq, Ref=25, HRef=1 m and ρRef=1000 kg/m3. The formula is valid for 25 < nq < 67. Below nq=25 the limit is Hst, opt=275 m; no limits are defined for the range above nq=67. The topic is discussed in more detail in Sect. 15.4 where three quality classes are defined.
- 4.
The definition of the total head ψtot is analogous to Eq. (8.9).
- 5.
The dimensionless time is defined by t*=t × fn.
- 6.
An example for this type of damping is given in [86]: The investigated system of a burner and fan was susceptible to self-excited vibrations below a specific flow rate. When testing fans with differently steep characteristics, the stable operation range increased with the steepness of the Q-H-curve.
- 7.
- 8.
This section is largely based on information given in [89].
- 9.
The possible interaction between acoustic waves and unsteady flow in a pump could be verified experimentally by generating pressure pulsations in a system by means of a device (e.g. piston or spark) and measuring their impact on the flow patterns in the diffuser and impeller (e.g. by laser velocimetry).
- 10.
If the excitation mechanism were caused by unbalanced mass forces, the mechanical vibration would be out of phase with the excitation.
References
Adams, M.L.: Rotating Machinery Vibration. Marcel Dekker Inc (2001)
Alford, J.S.: Protecting turbomachinery from self-excited rotor whirl. ASME. J. Engng. for Power. 87, 333–344 (1965)
Amoser, M.: Strömungsfelder und Radialkräfte an Labyrinthdichtungen hydraulischer Strömungsmaschinen. Diss. ETH. Nr. 11150 (1995)
Arndt, N., et al.: Unsteady diffuser vane pressure and impeller wake measurements in a centrifugal pump. Proc. 8th. Conference on Turbomachinery, Budapest, 49–56 (1987)
Au-Yang, M.K.: Flow-induced Vibrations of Power and Process Plant Components. Professional Engineering Publishing Ltd (2001)
Berten, S.: Hydrodynamics of high specific power pumps for off-design operating conditions. Diss. EPF, Lausanne (2010)
Berten, S., et al.: Experimental investigation of flow instabilities and rotating stall in a high-energy centrifugal pump stage. ASME. FEDSM. (2009)
Blevins, R.D.: Formulas for Natural Frequency and Mode Shape (Reissue). Krieger, Malabar (1995)
Blevins, R.D.: Flow-Induced Vibrations. (Reprinted 2nd ed.) Krieger Publishing Company, Malabar (2001)
Bolleter, U.: On blade passage tones of centrifugal pumps. Vibrations 4(3), 8–13 (1988)
Bolleter, U.: Generation and propagation of pressure pulsations in centrifugal pump systems. AECL Seminar on acoustic pulsations in rotating machinery. Toronto (1993)
Bolleter, U., et al.: Hydraulic and mechanical interactions of feedpump systems. EPRI Report TR-100990 (Sept 1992)
Bolleter, U., et al.: Rotordynamic modeling and testing of boiler feedpumps. EPRI Report. TR-100980 (Sept 1992)
Braun, O.: Part load flow in radial centrifugal pumps. Diss. EPF. Lausanne (2009)
Brennen, C.E.: Hydrodynamics of Pumps. Concepts ETI, Norwich (1994)
Casey, V.M., et al.: Flow analysis in a pump diffuser. Part 2: validation of a CFD code for steady flow. ASME. FED. 227 135–143 (1995)
Chen, Y.N.: Wasserdruckschwingungen in Spiralgehäusen von Speicherpumpen. Techn Rundschau Sulzer. Forschungsheft, 21–34 (1961)
Chen, Y.N., Beurer, P.: Strömungserregte Schwingungen an Platten infolge Karman’scher Wirbelstraßen. Pumpentagung, Karlsruhe (K6) (1973)
Chen, Y.N., Florjancic, D.: Vortex-induced resonance in a pipe system due to branching. IMech C109/75 (1975)
Chen, Y.N., et al.: Reduction of vibrations in a centrifugal pump hydraulic system pp. 78–84. IAHR Karlsruhe (1979)
Childs, D.: Turbomachinery Rotordynamics. Wiley, New York (1993)
Childs, D.W., et al.: Annular honeycomb seal test results for leakage and rotordynamic coefficients. ASME Paper. 88-Trib-35
Cooper, P., et al.: Minimum continuous stable flow in centrifugal pumps. Proc. Symp. Power. Plant. Pumps. New Orleans, 1987 EPRI CS-5857 (1988)
Corbo, M.A., Stearns, C.F.: Practical design against pump pulsations. Proc. 22nd. Interntl. Pump. Users. Symp., 137–177. Texas A&M (2005)
Cremer, R., Heckl, M.: Körperschall. 2. Aufl. Springer, Berlin (1995)
Deeprose, W.M., et al.: Current industrial pump and fan fluid-borne noise level prediction. IMechE. Paper. C251/77 43–50 (1977)
Domm, U., Dernedde, R.: Über eine Auswahlregel für die Lauf- und Leitschaufelzahl von Kreiselpumpen. KSB. Techn. Ber. 9 (1964)
Dörfler, P., Sick, M., Coutu, A.: Flow-Induced Pulsation and Vibrations in Hydroelectric Machinery. Springer, London (2013)
Dubas, M.: Über die Erregung infolge der Periodizität von Turbomaschinen. Ing. Archiv. 54 413–426 (1984)
Ehrich, F.F.: Handbook of Rotordynamics. McGraw Hill, New York (1992)
Ehrich, F.F., Childs, D.: Self-excited vibration in high-performance turbomachinery. Mech Engng. 106, 66–79 (May 1984)
Europump Leitfaden: Geräuschemission bei Kreiselpumpen. (2002)
Florjancic, D.: Entwicklung der Speisepumpen und grossen mehrstufigen Pumpen für die Wasserversorgung. Technical Review Sulzer. 4, 241–254 (1973)
Florjancic, S.: Annular seals of high energy centrifugal pumps: a new theory and full scale measurement of rotordynamic coefficients and hydraulic friction factors. Diss. ETH. Zürich (1990)
Försching, H.W.: Grundlagen der Aeroelastik. Springer, Berlin (1974)
Freese, H.D.: Querkräfte in axial durchströmten Drosselspalten. Pumpentagung, Karlsruhe (K6) (1978)
Gaffal, K.: Innovatives, umweltfreundliches und wirtschaftliches Speisepumpenkonzept erprobt. VGB. Kraftwerkstechnik. 73 223–230 (1993)
Graf, K.: Spaltströmungsbedingte Kräfte an berührungslosen Dichtungen von hydraulischen und thermischen Turbomaschinen. Diss. ETH Nr. 9319 (1991)
Greitzer, E.M.: The stability of pumping systems. ASME. J. Fluids. Engng. 103 (1981) 193-242
Guinzburg, A.: Rotordynamic forces generated by discharge to suction leakage flows in centrifugal pumps. California Institute of Technology Report E249.14 (1992)
Gülich, J.F.: European Patent EP 0224764 B1 (1989)
Gülich, J.F., et al.: Pump vibrations excited by cavitation. IMechE Conf on Fluid Machinery, The Hague (1990)
Gülich, J.F., et al.: Rotor dynamic and thermal deformation tests of high-speed boiler feedpumps. EPRI Report GS-7405 (July 1991)
Gülich, J.F., Bolleter, U.: Pressure pulsations in centrifugal pumps. ASME. J. Vibr. Acoustics. 114, 272–279 (1992)
Guo, S., Maruta, Y.: Experimental investigation on pressure fluctuations and vibration of the impeller in a centrifugal pump with vaned diffusers. JSME. Intl. J. 48(1), 136–143 (2005)
Hartlen, R.T., et al.: Dynamic interaction between pump and piping system. AECL Seminar on acoustic pulsations in rotating machinery. Toronto (1993)
Heckl, M., Müller, H.A.: Taschenbuch der Technischen Akustik. Springer, Berlin (1975)
Hergt, P., Krieger, P.: Radialkräfte in Leitradpumpen. KSB. Techn. Ber. 32–39 (1973)
Hergt, P., et al.: Fluid dynamics of slurry pump impellers. 8th Intl Conf Transport and Sedi-mentation of Solids, Prague, D2-1 (1995)
Höller, K.: in “25 Jahre ASTRÖ”. Aströ, Graz (1979)
Kaiser, T., Osman, R., Dickau, R.: Analysis Guide for Variable Frequency Drives Operated Centrifugal Pumps. Proc 24th Interntl Pump Users Symp, Texas A&M 81–106 (2008)
Kanki, H., et al.: Experimental research on the hydraulic excitation force on the pump shaft. ASME Paper 81-DET-71
Kaupert, K.A.: Unsteady flow fields in a high specific speed centrifugal impeller. Diss. ETH, Zürich (1997)
Kollmann, F.G.: Maschinenakustik. Grundlagen, Meßtechnik, Beeinflussung. 2. Aufl. Springer, Berlin (2000)
Krieger, P.: Wechselwirkungen von Laufrad und Gehäuse einer Einschaufelpumpe am Modell der instationären Strömung. Forsch. Ing. Wes. 54(6), 169–180 (1988)
Kündig, P.: Gestufte Labyrinthdichtungen hydraulischer Maschinen. Experimentelle Untersuchung der Leckage, der Reibung und der stationären Kräfte. Diss. ETH. Nr. 10366 (1993)
Kurtze, G.: Physik und Technik der Lärmbekämpfung. Braun, Karlsruhe (1964)
Kwong, A.H.M., Dowling, A.P.: Unsteady flow in diffusers. ASME. J. Fluids. Engng. 116 843–847 (1994)
Lucas, M.J., et al.: Handbook of the Acoustic Characteristics of Turbomachinery Cavities. ASME Press, New York (1997)
Luce, T.W., et al.: A numerical and LDV investigation of unsteady pressure fields in the vaneless space downstream of a centrifugal impeller. ASME FEDSM97-3327 (1997)
Makay, E., Barret, J.A.: Changes in hydraulic component geometries greatly increased power plant availability and reduced maintenance cost: case histories. 1st Intl. Pump. Symp., Houston (1984)
Marscher, W.D.: Subsynchronous vibration in boiler feedpumps due to stable response to hydraulic forces at part-load. Proc. IMechE. 202 167–175 (1988)
Meschkat, S.: Experimentelle Untersuchung der Auswirkung instationärer Rotor-Stator-Wechselwirkungen auf das Betriebsverhalten einer Spiralgehäusepumpe. Diss. TU, Darm-stadt (2004)
Meschkat, S., Stoffel, B.: The Local Impeller Head at Different Circumferential Positions in a Volute Casing of a Centrifugal Pump in Comparison to the Characteristic of the Impeller Alone. 21st IAHR Symp on hydraulic machinery and systems, Lausanne (2002)
Naudascher, E., Rockwell, D.: Flow-Induced Vibrations. An Engineering Guide. Balkema, Rotterdam (1994)
Nordmann, R., et al.: Rotordynamic coefficients and leakage flow for smooth and grooved seals in turbopumps. Proceedings IFToMM Meeting, Tokyo (Sept 1986)
Offenhäuser, H.: Druckschwankungsmesssungen an Kreiselpumpen mit Leitrad. VDI. Ber. 193, 211–218 (1973)
Reinsch, K.H., Barutzki, F.: Erhöhung der Lebensdauer von Rohrleitungssystemen durch den Einsatz viskoser Dämpfer. Rohrleitungstechnik, 7. Auf., Vulkan-Verlag, Essen
Robinet, F., Gülich, J.F., Kaiser, T.: Vane pass vibrations—source, assessment and correction—a practical guide for centrifugal pumps, pp. 121–137. 16th. Intl. Pump. Users. Symp., Houston (1999)
Ross, D.: Mechanics of underwater noise. Pergamon Press (1976)
Rütten, F.: Large eddy simulation in 90°-pipe bend flows. J. of Turbulence. 2, 003 (2001)
Sano, T., et al.: Alternate blade stall and rotating stall in a vaned diffuser. JSME. Intnl. Ser. B. 45(4), 810–819 (2002)
Schneider, K.: Das Verhalten von Kreiselpumpen beim Auftreten von Druckwellen. Diss. TU, Stuttgart (1986)
Schwartz, R., Nelson, R.: Acoustic resonance phenomena in high energy variable speed centrifugal pumps, pp. 23–28. 1st. Intl. Pump. Symposium., Houston (1984)
Spirig, M.: Einfluß der Kammerströmung auf die strömungsbedingten Kräfte im endlich langen Spalt einer hydraulischen Labyrinthdichtung. Diss. ETH. Nr. 13288 (1999)
Storace, A.F., et al.: Unsteady flow and whirl-inducing forces in axial-flow compressors. ASME. J. Turbo. machinery. 123, 433–445 (July 2001)
Storteig, E.: Dynamic characteristics and leakage performance of liquid annular seals in centrifugal pumps. Diss MTA-00-137 TU, Trondheim (2000)
Strub, R.A.: Pressure fluctuations and fatigue stresses in storage pumps and pump turbines. ASME paper No 63-AHGT-11 (1963)
Sudo, S.: Pumping plant noise reduction. Hitachi Rev. 29(5), 217–222 (1980)
Tanaka, H.: Vibration behavior and dynamic stress of runners of very high head reversible pump-turbines. IAHR. Symp. Belgrade, Beitrag U2 (1990)
Tsujimoto, Y., et al.: Observation of oscillating cavitation in an inducer. ASME. J. Fluids. Engng. 119 775–781 (1997)
Ubaldi, M., et al.: An experimental investigation of stator induced unsteadiness on centrifugal impeller outflow. ASME. J. Turbomach. 118, 41–51 (1996)
Verhoeven, J.: Unsteady hydraulic forces in centrifugal pumps. IMechE. Paper C348/88. (1988)
Warth, H.: Experimentelle Untersuchungen axial durchströmter Ringspalte von Hybridentlastungseinrichtungen. Diss TU Kaiserslautern, SAM Forschungsbericht Bd. 2 (2000)
Weaver, D.S.: Interaction of fluid flow and acoustic fields. AECL Seminar on acoustic pulsations in rotating machinery. Toronto (1993)
Weber, M.: Geräusch- und pulsationsarme Verbrennungsluftgebläse und deren Einfluß auf selbsterregte Brennkammerschwingungen. Diss. TU Kaiserslautern, SAM Forschungsbericht Bd 7 (2002)
Yedidiah, S.: Oscillations at low NPSH caused by flow conditions in the suction pipe. ASME Cavitation and Multiphase Flow Forum (1974)
Yuasa, T., Hinata, T.: Fluctuating flow behind the impeller of a centrifugal pump. Bull. JSME. 22(174), 1746–1753 (1979)
Ziada, S.: Flow-excited resonances of piping systems containing side-branches: excitation mechanism, counter-measures and design guidelines. AECL Seminar on acoustic pulsations in rotating machi-nery. Toronto (1993)
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Gülich, J. (2014). Noise and Vibrations. In: Centrifugal Pumps. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40114-5_10
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