Improvement of cavitation erosion characteristics of the centrifugal inducer stage with the inducer bush
DOI:
https://doi.org/10.15587/1729-4061.2018.139392Keywords:
centrifugal pump, centrifugal inducer stage, inducer bushes, cavitation erosion resistanceAbstract
The impact of the inducer bush, which is a stator bush with longitudinal straight grooves installed over the inducer in the model centrifugal stage on its performance, was studied. A physical experiment was performed with the use of the experimental design techniques to solve the problem of geometrical parameter optimization of the stator bush with longitudinal straight grooves in the multi-factorial problem regarding the improvement of cavitation erosion characteristics of the centrifugal inducer stage using the inducer bush. The frequency spectrum of excited oscillations of the studied centrifugal inducer stage caused by cavitation was determined in order to use the cavitation erosion resistance parameter as an optimization parameter. The optimal dimensions of the inducer bush of the studied centrifugal inducer stage were experimentally determined: Z=32, b=14, l1=20, and l2=20. This data allowed us to improve the cavitation erosion resistance of the centrifugal inducer stage without changing its overall dimensions and deteriorating head and power characteristics. An additional physical experiment was performed using an alternative method for determining the cavitation and erosion characteristics in order to confirm the results obtained in the study due to inducer bushes installed in the centrifugal inducer stage. The use of inducer bushes as a part of the centrifugal inducer stage was mainly intended to improve the centrifugal stage cavitation performance. This study proposes to use this part to overcome the negative effects of cavitation erosion. The possibility of such use was confirmed and research and methodological design recommendations for inducer bushes as part of the centrifugal inducer stage were developed. The installation of the improved first centrifugal stages with inducer bushes in the existing centrifugal pumps will increase the operating time to failure, which is relevant for all industries where centrifugal pumps are used.
References
- Nesbitt, B. (Ed.) (2006). Handbook of Pumps and Pumping. Elsevier Science, 470. doi: https://doi.org/10.1016/b978-1-85617-476-3.x5000-8
- Frenning, L. (Ed.) (2001). Pump life cycle costs: A guide to LCC analysis for pumping systems. Hydraulic institute & Europump, 194.
- Tverdohleb, I., Vizenkov, G., Birukov, A., Kutcenko, V., Vaschenko, A. (2012). Applying feed pump systems without boosters in NPPs. Nuclear Exchange, 31–33.
- Guo, X., Zhu, Z., Cui, B., Shi, G. (2016). Effects of the number of inducer blades on the anti-cavitation characteristics and external performance of a centrifugal pump. Journal of Mechanical Science and Technology, 30 (7), 3173–3181. doi: https://doi.org/10.1007/s12206-016-0510-1
- Vizenkov, G., Tverdohleb, I., Kucenko, V., Ivanyushin, A., Avdeenko, V. (2008). Nasosy special'nogo i obshchepromyshlennogo naznacheniya s predvklyuchennymi osevymi kolesami. Obzor opyta issledovaniy, razrabotki i ekspluatacii nasosov s predvklyuchennym osevym kolesom. Nasosy i oborudovanie, 3, 46–50.
- Kim, C., Kim, S., Choi, C.-H., Baek, J. (2017). Effects of inducer tip clearance on the performance and flow characteristics of a pump in a turbopump. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 231 (5), 398–414. doi: https://doi.org/10.1177/0957650917707656
- Song, W., Wei, L., Fu, J., Shi, J., Yang, X., Xu, Q. (2016). Analysis and control of flow at suction connection in high-speed centrifugal pump. Advances in Mechanical Engineering, 9 (1), 168781401668529. doi: https://doi.org/10.1177/1687814016685293
- Kurokawa, J. (2011). J-Groove Technique for Suppressing Various Anomalous Flow Phenomena in Turbomachines. International Journal of Fluid Machinery and Systems, 4 (1), 1–13. doi: https://doi.org/10.5293/ijfms.2011.4.1.001
- Imamura, H., Kurokawa, J., Matsui, J., Kikuchi, M. (2003). Suppression of Cavitating Flow in Inducer by Use of J-groove. The proceedings of the JSME annual meeting, 2003.2, 35–36. doi: https://doi.org/10.1299/jsmemecjo.2003.2.0_35
- Shimiya, N., Fujii, A., Horiguchi, H., Uchiumi, M., Kurokawa, J., Tsujimoto, Y. (2006). Suppression of Cavitation Instabilities in an Inducer by J-Groove (Control by the Change of Axial Location). Transactions of the Japan Society of Mechanical Engineers Series B, 72 (721), 2124–2131. doi: https://doi.org/10.1299/kikaib.72.2124
- Alison-Youel, S. (2010). Improved centrifugal pump performance with counter helical inducer housing grooves. AIChE Spring Meeting and Global Congress on Process Safety. Available at: https://www.aiche.org/academy/videos/conference-presentations/improved-centrifugal-pump-performance-counter-helical-inducer-housing-grooves
- Yelin, O. V. (2013). Doslidzhennia mozhlyvosti pidvyshchennia vsmoktuvalnoi zdatnosti shnekovovidtsentrovoho stupenia bez zminy heometriyi peredvkliuchenoho i robochoho kolesa. Visnyk SumDU. Seriya: Tekhnichni nauky, 4, 7–16.
- Rzhebaeva, N. K., Zhukov, V. M., Kucenko, V. A. (1990). Shneko-centrobezhnaya stupen' nasosa. Kharkiv, 40.
- Zaks, L. (1976). Statisticheskoe ocenivanie. Moscow: Statistika, 598.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2018 Pavlo Tkach, Andrii Yashchenko, Oleksandr Gusak, Sergey Khovanskyy, Vitalii Panchenko, Iryna Grechka
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.
