Numerical Investigation of Transient Flow in a Prototype Centrifugal Pump during Startup Period
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Yu-Liang Zhang
,
Zu-Chao Zhu
Abstract
Transient performance of pumps during transient operating periods, such as startup and stopping, has drawn more and more attentions recently due to the growing engineering needs. During the startup period of a pump, the performance parameters such as the flow rate and head would vary significantly in a broad range. Therefore, it is very difficult to accurately specify the unsteady boundary conditions for a pump alone to solve the transient flow in the absence of experimental results. The closed-loop pipe system including a centrifugal pump is built to accomplish the self-coupling calculation. The three-dimensional unsteady incompressible viscous flow inside the passage of the pump during startup period is numerically simulated using the dynamic mesh method. Simulation results show that there are tiny fluctuations in the flow rate even under stable operating conditions and this can be attributed to influence of the rotor–stator interaction. At the very beginning of the startup, the rising speed of the flow rate is lower than that of the rotational speed. It is also found that it is not suitable to predict the transient performance of pumps using the calculation method of quasi-steady flow, especially at the earlier period of the startup.
Funding statement: Funding: The research is supported by Zhejiang Provincial Natural Science Foundation of China (No.LY14E090011), Zhejiang Provincial Science and Technology Project (No.2015C31129), Academic Foundation of Quzhou University (No.XNZQN201508) and Chinese National Foundation of Natural Science (No.51536008 & No.51275272).
Acknowledgments
Special thank is given to Prof. Wen-Guang Li for helpful discussions.
References
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© 2017 Walter de Gruyter GmbH, Berlin/Boston
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Artikel in diesem Heft
- Frontmatter
- Study of Decay Characteristics of Hexagonal and Square Supersonic Jet
- Investigation on the Film Cooling Performance of Diffuser Shaped Holes with Different Inclination Angles
- Model-based Acceleration Control of Turbofan Engines with a Hammerstein-Wiener Representation
- Fatigue Life Prediction of Low Pressure Turbine Shaft of Turbojet Engine
- Influence of Geometry on Rotordynamic Coefficients of Brush Seal
- Numerical Investigation of Transient Flow in a Prototype Centrifugal Pump during Startup Period
- Thrust Performance Evaluation of a Turbofan Engine Based on Exergetic Approach and Thrust Management in Aircraft
- Real-time Simulation of Turboprop Engine Control System
- Ignition Study on a Rotary-valved Air-breathing Pulse Detonation Engine
