The clocking positions between the inducer and the impeller have a certain impact on the performance of the high-speed centrifugal pump, which however, is often ignored by designers. In the present study, three-dimensional numerical simulation based on detached eddy simulation method is adopted to evaluate the influence of this clocking effect on unsteady pressure pulsations in a full-scale liquid rocket engine oxygen turbopump. A new omega vortex identification method is introduced to clarify the internal correlation between unsteady flow structures and pressure pulsations and to shed comprehensive light on the formation mechanism of this clocking effect. Results show that the clocking effect has little influence on the unsteady pressure field in inducer passages while it significantly affects the rotor–stator interaction (RSI) effect leading to the alteration of the pressure spectra in RSI region, diffuser and volute diffuser pipe. The components at the inducer blade passing frequency in the pressure spectra are remarkably suppressed and the total pressure pulsation energy in these regions is decreased by an average of 13.94%, 12.94%, and 34.65%, respectively, when the inducer blade trailing edges are located in the middle of two adjacent impeller blades. The vortex analysis in the specific region reveals that the pressure pulsations in RSI region and the downstream regions are closely associated with the unsteady vortex shedding from the diffuser blades and the formation of the clocking effect is precisely due to different processes of the periodic vortex shedding from the diffuser blade pressure surfaces.
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July 2019
Research-Article
Numerical Investigation of the Clocking Effect Between Inducer and Impeller on Pressure Pulsations in a Liquid Rocket Engine Oxygen Turbopump
Baofeng Yang,
Baofeng Yang
Science and Technology on
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: ybf1000@qq.com
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: ybf1000@qq.com
Search for other works by this author on:
Bin Li,
Bin Li
Academy of Aerospace Propulsion Technology,
No. 269 Jitai Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: casclibin@vip.sohu.com
No. 269 Jitai Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: casclibin@vip.sohu.com
Search for other works by this author on:
Hui Chen,
Hui Chen
Science and Technology on
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: chenhui2013abc@163.com
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: chenhui2013abc@163.com
Search for other works by this author on:
Zhanyi Liu,
Zhanyi Liu
Science and Technology on
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: 156904777@qq.com
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: 156904777@qq.com
Search for other works by this author on:
Kaifu Xu
Kaifu Xu
Xi'an Aerospace Propulsion Institute,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: xukaifu067@163.com
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: xukaifu067@163.com
Search for other works by this author on:
Baofeng Yang
Science and Technology on
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: ybf1000@qq.com
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: ybf1000@qq.com
Bin Li
Academy of Aerospace Propulsion Technology,
No. 269 Jitai Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: casclibin@vip.sohu.com
No. 269 Jitai Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: casclibin@vip.sohu.com
Hui Chen
Science and Technology on
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: chenhui2013abc@163.com
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: chenhui2013abc@163.com
Zhanyi Liu
Science and Technology on
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: 156904777@qq.com
Liquid Rocket Engine Laboratory,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: 156904777@qq.com
Kaifu Xu
Xi'an Aerospace Propulsion Institute,
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: xukaifu067@163.com
No. 289 Feitian Road,
Changan,
Xi'an 710100, Shaanxi, China
e-mail: xukaifu067@163.com
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received August 29, 2018; final manuscript received November 26, 2018; published online January 30, 2019. Assoc. Editor: Sergio Pirozzoli.
J. Fluids Eng. Jul 2019, 141(7): 071109 (9 pages)
Published Online: January 30, 2019
Article history
Received:
August 29, 2018
Revised:
November 26, 2018
Citation
Yang, B., Li, B., Chen, H., Liu, Z., and Xu, K. (January 30, 2019). "Numerical Investigation of the Clocking Effect Between Inducer and Impeller on Pressure Pulsations in a Liquid Rocket Engine Oxygen Turbopump." ASME. J. Fluids Eng. July 2019; 141(7): 071109. https://doi.org/10.1115/1.4042160
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