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Research Papers: Multiphase Flows

Experimental Characterization of Thermal Cavitation Effects on Space Rocket Axial Inducers

[+] Author and Article Information
Lucio Torre

 Alta S.p.A. Via Gherardesca 5, I-56121 Pisa, Italyl.torre@alta-space.com Professor University of Pisa, Via G. Caruso 8, I-56122 Pisa, Italy e-mail: luca.dagostino@ing.unipi.itl.torre@alta-space.com

Angelo Cervone

 Alta S.p.A. Via Gherardesca 5, I-56121 Pisa, Italya.cervone@alta-space.com Professor University of Pisa, Via G. Caruso 8, I-56122 Pisa, Italy e-mail: luca.dagostino@ing.unipi.ita.cervone@alta-space.com

Angelo Pasini

 Alta S.p.A. Via Gherardesca 5, I-56121 Pisa, Italya.pasini@alta-space.com Professor University of Pisa, Via G. Caruso 8, I-56122 Pisa, Italy e-mail: luca.dagostino@ing.unipi.ita.pasini@alta-space.com

Luca d’Agostino

 Alta S.p.A. Via Gherardesca 5, I-56121 Pisa, Italy Professor University of Pisa, Via G. Caruso 8, I-56122 Pisa, Italy e-mail: luca.dagostino@ing.unipi.it

J. Fluids Eng 133(11), 111303 (Nov 11, 2011) (10 pages) doi:10.1115/1.4005257 History: Received August 24, 2011; Revised October 06, 2011; Published November 11, 2011; Online November 11, 2011

The paper shows the results of an experimental campaign conducted in the CPRTF (Cavitating Pump Rotordynamic Test Facility) at ALTA S.p.A., aimed at characterizing the cavitation thermal effects on two tapered-hub, variable-pitch inducers, designated as DAPAMITO. The semiempirical method proposed by Ruggeri and Moore for scaling the thermal cavitation effects has been successfully applied and consequently, a further validation of this method has been provided. The influence of the temperature on the intensity of the performance degradation associated with the attached cavitation instability has been identified as a new typology of cavitation thermal effects. In this case, the inhibition of the bubble growth due to thermal effects can be detected by the reduction of the performance degradation usually associated with this type of instability.

Copyright © 2011 by American Society of Mechanical Engineers
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References

Figures

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Figure 12

Cavitating performance of DAPAMITO3 inducer at ΦD in cold and hot water

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Figure 13

Cavitating performance of DAPAMITO3 inducer at 105% ΦD in cold and hot water

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Figure 14

Cavitating performance of DAPAMITO4 inducer at 76% ΦD in cold and hot water (inlet pressure tap located more than six diameters upstream of the inducer)

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Figure 15

Comparison between the experimental and predicted DAPAMITO4 inducer cavitation performance at Φ = 0.053

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Figure 10

Cavitating performance of DAPAMITO3 inducer at 90% ΦD in cold and hot water

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Figure 11

Cavitating performance of DAPAMITO3 inducer at 95% ΦD in cold and hot water

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Figure 1

Schematic of the cavitating pump rotordynamic test facility

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Figure 2

Front view of the DAPAMITO3 (left) and DAPAMITO4 (right) inducers

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Figure 3

Cavitating performance of DAPAMITO4 inducer at 63% ΦD in cold and hot water

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Figure 4

Cavitating performance of DAPAMITO4 inducer at 71% ΦD in cold and hot water

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Figure 5

Cavitating performance curve and waterfall plot of the power spectrum of the inlet pressure fluctuations on DAPAMITO4 inducer at 84% ΦD and t = 15.4 °C

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Figure 6

Cavitating performance of DAPAMITO4 inducer at 76% ΦD in cold and hot water

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Figure 7

Cavitating performance of DAPAMITO4 inducer at 80% ΦD in cold and hot water

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Figure 8

Cavitating performance of DAPAMITO4 inducer at 84% ΦD in cold and hot water

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Figure 9

Cavitating performance of DAPAMITO3 inducer at 75% ΦD in cold and hot water

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