Rocket turbopumps sometimes experience self-excited shaft vibration due to rotordynamic forces. To prevent this vibration, a key step is to establish a method to measure and evaluate the rotordynamic forces that act on turbopump components. In this study, we measured rotordynamic forces acting on a two-stage inducer using a rotordynamic test stand developed in 2012 at Kakuda Space Center. In noncavitating conditions, we did not observe strong nonlinearities in rotordynamic forces in the inducer at low flow rate conditions. The results of the pressure fluctuation on the inducer showed that rotordynamic forces were mainly excited in the second stage of the inducer. In cavitating conditions, we found that there is no strong nonlinearity between cavitating rotordynamic forces and the whirling frequency ratio in the inducer. These results show the robustness of the rotordynamic forces acting on the inducer against the flow rate and cavitation.
Skip Nav Destination
Article navigation
February 2018
Research-Article
Rotordynamic Forces Acting on a Two-Stage Inducer
Naoki Nagao,
Naoki Nagao
Research and Development Directorate,
Japan Aerospace Exploration Agency,
2-1-1 Sengen,
Tsukuba, Ibaraki 305-8505,
Japan e-mail: nagao.naoki@jaxa.jp
Japan Aerospace Exploration Agency,
2-1-1 Sengen,
Tsukuba, Ibaraki 305-8505,
Japan e-mail: nagao.naoki@jaxa.jp
Search for other works by this author on:
Katsuji Nagaura,
Katsuji Nagaura
Operations Department,
Foundation for Promotion of
Japanese Aero-Space Technology,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: nagaura.katsuji@jaxa.jp
Foundation for Promotion of
Japanese Aero-Space Technology,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: nagaura.katsuji@jaxa.jp
Search for other works by this author on:
Tsutomu Tamura,
Tsutomu Tamura
Operations Department,
Foundation for Promotion of
Japanese Aero-Space Technology,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: tamura.tsutomu@jaxa.jp
Foundation for Promotion of
Japanese Aero-Space Technology,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: tamura.tsutomu@jaxa.jp
Search for other works by this author on:
Satoshi Hasegawa,
Satoshi Hasegawa
Research and Development Directorate,
Japan Aerospace Exploration Agency,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: hasegawa.satoshi@jaxa.jp
Japan Aerospace Exploration Agency,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: hasegawa.satoshi@jaxa.jp
Search for other works by this author on:
Masaharu Uchiumi
Masaharu Uchiumi
Research and Development Directorate,
Japan Aerospace Exploration Agency,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: uchiumi.masaharu@jaxa.jp
Japan Aerospace Exploration Agency,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: uchiumi.masaharu@jaxa.jp
Search for other works by this author on:
Naoki Nagao
Research and Development Directorate,
Japan Aerospace Exploration Agency,
2-1-1 Sengen,
Tsukuba, Ibaraki 305-8505,
Japan e-mail: nagao.naoki@jaxa.jp
Japan Aerospace Exploration Agency,
2-1-1 Sengen,
Tsukuba, Ibaraki 305-8505,
Japan e-mail: nagao.naoki@jaxa.jp
Katsuji Nagaura
Operations Department,
Foundation for Promotion of
Japanese Aero-Space Technology,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: nagaura.katsuji@jaxa.jp
Foundation for Promotion of
Japanese Aero-Space Technology,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: nagaura.katsuji@jaxa.jp
Tsutomu Tamura
Operations Department,
Foundation for Promotion of
Japanese Aero-Space Technology,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: tamura.tsutomu@jaxa.jp
Foundation for Promotion of
Japanese Aero-Space Technology,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: tamura.tsutomu@jaxa.jp
Satoshi Hasegawa
Research and Development Directorate,
Japan Aerospace Exploration Agency,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: hasegawa.satoshi@jaxa.jp
Japan Aerospace Exploration Agency,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: hasegawa.satoshi@jaxa.jp
Masaharu Uchiumi
Research and Development Directorate,
Japan Aerospace Exploration Agency,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: uchiumi.masaharu@jaxa.jp
Japan Aerospace Exploration Agency,
1 Kimigaya Aza Koganezawa,
Kakuda, Miyagi 981-1525, Japan
e-mail: uchiumi.masaharu@jaxa.jp
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received September 9, 2016; final manuscript received May 15, 2017; published online November 3, 2017. Assoc. Editor: Olivier Coutier-Delgosha.
J. Fluids Eng. Feb 2018, 140(2): 021112 (6 pages)
Published Online: November 3, 2017
Article history
Received:
September 9, 2016
Revised:
May 15, 2017
Citation
Nagao, N., Nagaura, K., Tamura, T., Hasegawa, S., and Uchiumi, M. (November 3, 2017). "Rotordynamic Forces Acting on a Two-Stage Inducer." ASME. J. Fluids Eng. February 2018; 140(2): 021112. https://doi.org/10.1115/1.4037986
Download citation file:
218
Views
Get Email Alerts
Cited By
Switching Events of Wakes Shed From Two Short Flapping Side-by-Side Cylinders
J. Fluids Eng (May 2025)
Related Articles
Experimental Characterization of the Rotordynamic Forces on Space Rocket Axial Inducers
J. Fluids Eng (October,2011)
Inducer and Centrifugal Pump Contributions to the Rotordynamic Fluid Forces Acting on a Space Turbopump
J. Fluids Eng (February,2018)
Continuous Spectrum of the Rotordynamic Forces on a Four Bladed Inducer
J. Fluids Eng (December,2011)
Rotordynamic Force Coefficients of Volutes and Diffusers for Prediction of Turbomachinery Vibration
J. Vib. Acoust (October,2018)
Related Proceedings Papers
Related Chapters
Applications
Introduction to Finite Element, Boundary Element, and Meshless Methods: With Applications to Heat Transfer and Fluid Flow
Introduction
Design of Mechanical Bearings in Cardiac Assist Devices
Introduction
Centrifugal Compressors: A Strategy for Aerodynamic Design and Analysis