Affiliation:
1. Civil Aviation University of China, Tianjin 300300, China
Abstract
In this paper, a cavitation bubble in the centrifugal pump cavitation phenomenon was observed in the analysis and research to explore the characteristics of a cavitation bubble in a centrifugal pump. Through the construction of a visualization centrifugal pump test platform and the observation of a high-speed camera, an image processing method was used to extract the characteristics of the cavitation bubble in the captured results, and the characteristics of the cavitation bubble in the centrifugal pump were analyzed and studied in a quantitative way. The results show that the shapes of the cavitation bubbles in a centrifugal pump can be simplified approximately into an ellipsoid shape, more than 75% of the bubbles have a length–diameter ratio between 1 and 2, and the distribution is relatively uniform. Different working conditions affect the size of the cavitation bubble but have little effect on the shape. The average size of the cavitation bubble under different working conditions was calculated by data fitting. This method, which combines high-speed imaging technology and image processing technology, is capable of observing the behavioral characteristics of cavitation bubbles in centrifugal pump cavitation flow both in detail and intuitively. The new method is provided to describe quantitatively the shapes and sizes of bubbles. It is of great significance in understanding the movement characteristics and manifestations of bubbles during a centrifugal pump’s operation and in the further study of the micro mechanisms of the negative effects of cavitation on equipment performance.
Funder
Ministry of Education Chunhui Project
Civil Aviation University of China Postgraduate Scientific Research Innovation Project-Aviation Special Project
Industry-University Cooperative Education Project
Subject
Process Chemistry and Technology,Chemical Engineering (miscellaneous),Bioengineering
Reference18 articles.
1. Application of the semi-analytical cavitation model to flows in a centrifugal pump;Ye;Int. Commun. Heat Mass Transf.,2017
2. Experiment and Numerical Simulation of Cavitation Evolution in High Speed Centrifugal Pump with Inducer;Cui;Trans. Chin. Soc. Agric. Mach.,2018
3. Numerical analysis of the influence of the tip clearance flows on the unsteady cavitating flows in a three-dimensional inducer;Okita;J. Hydrodyn. Ser. B,2009
4. Analysis of Unsteady Cavitation Flow Field and Cavitation Bubble Characteristics for a Centrifugal Pump;Wang;Fluid Mach.,2020
5. Investigation of Instabilities of Cavitation at Low Flow Rate of Centrifugal Pump;Lu;Trans. Chin. Soc. Agric. Mach.,2015