Influence of Turbulence Models on the Flow Field Simulation of Annular Jet Pump
[1]XIANG Weining,CHEN Yunliang,XIONG Shun,et al.Influence of Turbulence Models on the Flow Field Simulation of Annular Jet Pump[J].Journal of Zhengzhou University (Engineering Science),2024,45(pre):2-.[doi:10. 13705 / j. issn. 1671-6833. 2024. 04. 013]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
45
Number of periods:
2024 pre
Page number:
2-
Column:
Public date:
2024-12-31
- Title:
- Influence of Turbulence Models on the Flow Field Simulation of Annular Jet Pump
- Keywords:
- annular jet pump; turbulence model; performance; recirculation zone; entropy production theory
- CLC:
- TH38
- DOI:
- 10. 13705 / j. issn. 1671-6833. 2024. 04. 013
- Abstract:
- To accurately reflect the influence of intense momentum exchange of the fluid in the annular jet pump suction chamber, a comparison calculation using different turbulence models and wall functions was conducted, and hydraulic experiments were carried out to verify the results. The results show that different wall functions have little effect on the performance and wall pressure coefficient calculation of the annular jet pump.Compared to the RNG k-ε (RNG), Standard k-ω (SKW), SST k-ω (SST)models, the results calculated using the Realizable k-ε (RKE) model or Reynolds stress model (RSM) combined with the Scalable Wall Function (ScWF) are more consistent with the measurements.By comparing the simulated flow field, it was found that the performance prediction results of different turbulence models under low flow ratio conditions are related to the distribution range of the recirculation zone simulated. The larger the range of the recirculation zone simulated, the lower the predicted performance of the annular jet pump. Based on the analysis of entropy production theory, it is believed that the energy loss of the annular jet pump is mainly caused by the turbulent entropy production distributed in the wall and the mixed shear layer. Under high flow rate conditions, the high turbulent entropy production rate calculated by the RSM model is the main reason for its lower prediction performance compared to the RKE model.
- References:
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Last Update:
2024-10-08