0
Research Papers: Multiphase Flows

Geometry Effects on Flow Instabilities of Different Three-Bladed Inducers

[+] Author and Article Information
Giovanni Pace

Alta S.p.A.,
5 Via Gherardesca,
Ospedaletto, Pisa 56121, Italy
e-mail: g.pace@alta-space.com

Dario Valentini

Alta S.p.A.,
5 Via Gherardesca,
Ospedaletto, Pisa 56121, Italy
e-mail: d.valentini@alta-space.com

Angelo Pasini

Alta S.p.A.,
5 Via Gherardesca,
Ospedaletto, Pisa 56121, Italy
e-mail: a.pasini@alta-space.com

Lucio Torre

Alta S.p.A.,
5 Via Gherardesca,
Ospedaletto, Pisa 56121, Italy
e-mail: l.torre@alta-space.com

Yanxia Fu

National Research Center of Pumps and
Pumping System Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, China
e-mail: yanxiafu40@gmail.com

Luca d'Agostino

Professor
Civil and Industrial Engineering Department,
University of Pisa,
2 Largo L.Lazzarino,
Pisa 56121, Italy
e-mail: luca.dagostino@ing.unipi.it

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received March 25, 2014; final manuscript received November 7, 2014; published online January 20, 2015. Assoc. Editor: Olivier Coutier-Delgosha.

J. Fluids Eng 137(4), 041304 (Apr 01, 2015) (12 pages) Paper No: FE-14-1151; doi: 10.1115/1.4029113 History: Received March 25, 2014; Revised November 07, 2014; Online January 20, 2015

The paper presents the results of an activity carried out on a three-bladed inducer and compares the experimental data from other similar inducers. All the inducers considered in the present study have been designed by means of the simplified analytical model recently developed by some of the authors. The main effects of different geometrical solutions on hydraulic performance and flow instabilities of the pumps under noncavitating and cavitating conditions are presented in the paper.

Copyright © 2015 by ASME
Your Session has timed out. Please sign back in to continue.

References

Stripling, L. B., and Acosta, A. J., 1962, “Cavitation in Turbopumps—Part 1,” ASME J. Fluids Eng., 84(3), pp. 326–338.
Stripling, L. B., and Acosta, A. J., 1962, “Cavitation in Turbopumps—Part 2,” ASME J. Fluids Eng., 84(3), pp. 349–350.
Tsujimoto, Y., 2007, “Cavitation Instabilities in Turbopump Inducers,” Fluid Dynamics of Cavitation and Cavitating Turbopumps (CISM Courses and Lectures), Vol. 496, L.d'Agostino and M. V.Salvetti, eds., International Centre for Mechanical Sciences, Springer, Vien, New York, pp. 253–278.
d'Agostino, L., 2013, “Turbomachinery Developments and Cavitation,” VKI Lecture Series on Fluid Dynamics Associated to Launcher Developments, von Karman Institute of Fluid Dynamics, Rhode-Saint-Genèse, Belgium, Apr. 15–17, STO-AVT-LS-206, Paper No. NBR 12-1.
Sack, L. E., and Nottage, H. B., 1965, “System Oscillations Associated to Cavitating Inducers,” ASME J. Fluids Eng., 87(4), pp. 917–924.
Natanzon, M. S., et al. ., 1974, “Experimental Investigation of Cavitation Induced Oscillations of Helical Inducers,” Fluid Mech. - Sov. Res., 3(1), pp. 38–45.
Brennen, C. E., and Acosta, A. J., 1973, “Theoretical, Quasi-Static Analysis of Cavitation Compliance in Turbopumps,” J. Spacecr., 10(3), pp. 175–179. [CrossRef]
Brennen, C. E., and Acosta, A. J., 1976, “The Dynamic Transfer Function for a Cavitating Inducer,” ASME J. Fluids Eng., 98(2), pp. 182–191. [CrossRef]
Ng, S. L., and Brennen, C. E., 1978, “Experiments on the Dynamic Behavior of Cavitating Pumps,” ASME J. Fluids Eng., 100(2), pp. 166–176. [CrossRef]
Braisted, D. M., 1979, “Cavitation Induced Instabilities Associated With Turbomachines,” California Institute of Technology, Report No. E184.2.
d'Auria, F., d'Agostino, L., and Brennen, C. E., 1995, “Bubble Dynamic Effects on the Rotordynamic Forces in Cavitating Inducers,” ASME Fluids Engineering Summer Meeting, Hilton Island, SC, Aug. 13–18.
d'Agostino, L., d'Auria, F., and Brennen, C. E., 1998, “A Three-Dimensional Analysis of Rotordynamic Forces on Whirling and Cavitating Helical Inducers,” ASME J. Fluids Eng., 120(6), pp. 698–704. [CrossRef]
Cervone, A., Testa, R., Bramanti, C., Rapposelli, E., and d'Agostino, L., 2005, “Thermal Effects on Cavitation Instabilities in Helical Inducers,” AIAA J. Propul. Power, 21(5), pp. 893–899. [CrossRef]
Cervone, A., Torre, L., Bramanti, C., Rapposelli, E., and d'Agostino, L., 2006, “Experimental Characterization of Cavitation Instabilities in a Two-Bladed Axial Inducer,” AIAA J. Propul. Power, 22(6), pp. 1389–1395. [CrossRef]
Cervone, A., Bramanti, C., Torre, L., Fotino, D., and d'Agostino, L., 2007, “Setup of a High-Speed Optical System for the Characterization of Instabilities Generated by Cavitation,” ASME J. Fluids Eng., 129(7), pp. 877–885. [CrossRef]
Rubin, S., 1966, “Longitudinal Instability of Liquid Rockets Due to Propulsion Feedback (POGO),” J. Spacecr. Rockets, 3(8), pp. 1188–1195. [CrossRef]
Brennen, C. E., 1994, Hydrodynamics of Pumps, Concepts ETI, Inc. and Oxford University, Oxford, UK.
Kamijo, K., Yoshida, M., and Tsujimoto, Y., 1993, “Hydraulic and Mechanical Performance of LE-7 LOX Pump Inducer,” AIAA J. Propul. Power, 9(6), pp. 819–826. [CrossRef]
Tsujimoto, Y., Yoshida, Y., Maekawa, Y., Watanabe, S., and Hashimoto, T., 1997, “Observation of Oscillating Cavitation of an Inducers,” ASME J. Fluids Eng., 119(4), pp. 775–781. [CrossRef]
Hashimoto, T., Yoshida, M., Watanabe, M., Kamijo, K., and Tsujimoto, Y., 1997, “Experimental Study of Rotating Cavitation of Rocket Propellant Pump Inducers,” AIAA J. Propul. Power, 13(4), pp. 488–494. [CrossRef]
Zoladz, T., 2000, “Observations on Rotating Cavitation and Cavitation Surge From the Development of the Fastrac Engine Turbopump,” 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Huntsville, AL.
Tsujimoto, Y., and Semenov, Y. A., 2002, “New Types of Cavitation Instabilities in Inducers,” 4th International Conference on Launcher Technology, Liege, Belgium.
Subbaraman, M., and Patton, M., 2006, “Suppressing Higher-Order Cavitation Phenomena in Axial Inducers,” 6th International Symposium on Cavitation, Wageningen, The Netherlands, Paper No. CAV2006.
Rapposelli, E., Cervone, A., and d'Agostino, L., 2002 “A New Cavitating Pump Rotordynamic Test Facility,” 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Indianapolis, IN.
Pace, G., Pasini, A., Torre, L., Valentini, D., and d'Agostino, L., 2012, “The Cavitating Pump Rotordynamic Test Facility at ALTA S.p.A.: Upgraded Capabilities of a Unique Test Rig,” Space Propulsion Conference, Boredeaux, France, May 7–10.
d'Agostino, L., Torre, L., Pasini, A., and Cervone, A., 2008, “A Reduced Order Model for Preliminary Design and Performance Prediction of Tapered Inducers,” 12th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-12), Honolulu, HI, Feb. 17–22.
d'Agostino, L., Torre, L., Pasini, A., and Cervone, A., 2008, “On the Preliminary Design and Noncavitating Performance of Tapered Axial Inducers,” ASME J. Fluids Eng., 130(11), p. 111303. [CrossRef]
Cervone, A., Torre, L., Pasini, A., and d'Agostino, L., 2009, “Cavitation and Flow Instabilities in a 3-Bladed Axial Inducer Designed by Means of a Reduced Order Analytical Model,” Proceedings of the 7th International Symposium on Cavitation (CAV 2009), Ann Arbor, MI, Aug. 17–22, Paper No. 92.
Torre, L., Pace, G., Miloro, P., Pasini, A., Cervone, A., and d'Agostino, L., 2010, “Flow Instabilities on a Three-Bladed Axial Inducer at Variable Tip Clearance,” 13th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-13), Honolulu, HI, Apr. 4–9.
Cervone, A., Pace, G., Torre, L., Pasini, A., Bartolini, S., Agnesi, L., and d'Agostino, L., 2012, “Effects of the Leading Edge Shape on the Performance of an Axial Three Bladed Inducer,” 14th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-14), Honolulu, HI, Feb. 27–Mar. 2.
Jakobsen, K., 1971, “Liquid Rocket Engine Turbopump Inducers,” NASA Space Vehicle Design Criteria (Chemical Propulsion), NASA SP8052.
Torre, L., Pasini, A., Cervone, A., Pace, G., Miloro, P., and d'Agostino, L., 2011, “Effect of Tip Clearance on the Performance of a Three-Bladed Axial Inducer,” AIAA J. Propul. Power, 27(4), pp. 890–898. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

The CPRTF at ALTA S.p.A

Grahic Jump Location
Fig. 2

A frontal view of an inducer set in the Plexiglass duct. The angular spacing between the pressure transducers is clearly shown on the right.

Grahic Jump Location
Fig. 3

Schematic of the CPRTF together with the main components

Grahic Jump Location
Fig. 4

The three inducers compared: DAPAMITO3 (left), DAPAMITOR3 (mid), and DAPROT3 (right)

Grahic Jump Location
Fig. 5

Test section setup for all of the test inducers

Grahic Jump Location
Fig. 6

Pumping performance for the three considered inducers tested at room temperature

Grahic Jump Location
Fig. 7

Comparison of the experimental pumping performance (circles and stars) of inducer DAPROT3 with the model prediction (squares point)

Grahic Jump Location
Fig. 8

Results of steady tests for the suction performance characterization of the DAPROT3 inducer at different values of the flow coefficient, expressed as a fraction of the design value

Grahic Jump Location
Fig. 9

Results of unsteady (continuous) tests for the suction performance characterization of the DAPROT3 inducer at different values of the flow coefficient, expressed as a fraction of the design value. The points corresponding to −5% head degradation with respect to noncavitating operation are also shown.

Grahic Jump Location
Fig. 10

Comparison between the steady test results (triangles) and the continuous suction performance characterization of the DAPROT3 inducer (triangles with lines) at 120% of its design flow coefficient

Grahic Jump Location
Fig. 11

Photographs of cavitation in the DAPAMITO3 (top), DAPAMITOR3 (mid), and DAPROT3 (bottom) inducers at design flow coefficient

Grahic Jump Location
Fig. 12

Suction performance characteristics of the DAPAMITO3, DAPAMITOR3, and DAPROT3 inducers at design flow coefficient. The head coefficients are nondimensionalized w.r.t. the corresponding noncavitating values.

Grahic Jump Location
Fig. 13

Waterfall plot of the power spectral density of inlet pressure signals measured at the inlet of the DAPROT3 operating at Ф = 1.1 ФD and water temperature T = 20 °C

Grahic Jump Location
Fig. 14

Amplitude of the power spectral density (top), phase of the cross-spectral density (mid), and coherence function (bottom) of the unsteady pressure signals from two transducers with 45 deg angular spacing located at the inlet of the DAPROT3 inducer operating at Φ = 1.00 ΦD, σ = 0.322, and T = 20 °C.

Grahic Jump Location
Fig. 15

Phase of the cross-correlation of the unsteady pressure signals from two transducers located at the inlet of the DAPROT3 inducer as a function of their angular spacing. The inducer operates at Φ = 1.00 ΦD, σ = 0.322, and T = 20 °C, the same conditions of the data shown in Figs. 13 and 14.

Grahic Jump Location
Fig. 16

Amplitude of the power spectrum density of the unsteady inlet pressure signals as a function of cavitation number for the DAPROT3 inducer operating under low-frequency surge conditions at Φ = 1.00 ΦD and T = 20 °C

Grahic Jump Location
Fig. 17

Amplitude of the power spectrum density of the unsteady inlet pressure signals at the shaft rotational frequency (dot symbols) as a function of cavitation number for the DAPROT3 inducer operating at Φ = 1.00 ΦD and T = 20 °C. For better interpretation of the data, the suction performance characteristic is also plotted in the same diagram (stars symbols).

Grahic Jump Location
Fig. 18

Amplitude of the power autospectra as functions of the cavitation number for the DAPROT3 and DAPAMITOR3 inducers at the shaft rotational frequency Ω (top) and blade passage frequency 3Ω (bottom) for operation at Φ = 1.00 ΦD and T = 20 °C

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In