[1]向伟宁,陈云良,熊顺,等.不同湍流模型对环形射流泵流场模拟的影响[J].郑州大学学报(工学版),2024,45(pre):2.[doi:10. 13705 / j. issn. 1671-6833. 2024. 04. 013]
　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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不同湍流模型对环形射流泵流场模拟的影响()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
45
期数:
2024年pre
页码:
2
栏目:
出版日期:
2024-12-31

文章信息/Info

Title:
Influence of Turbulence Models on the Flow Field Simulation of Annular Jet Pump
作者:
向伟宁; 陈云良; 熊顺; 张艳
(四川大学 水利水电学院, 四川 成都 610065 )
Author(s):
XIANG Weining;  CHEN Yunliang;  XIONG Shun;  Zhang Yan
(School of Water Resources and Hydropower, Sichuan University, Chengdu 610065, China)
关键词:
环形射流泵; 湍流模型; 性能; 回流区; 熵产理论
Keywords:
annular jet pump; turbulence model; performance; recirculation zone; entropy production theory
分类号:
TH38
DOI:
10. 13705 / j. issn. 1671-6833. 2024. 04. 013
文献标志码:
A
摘要:
为准确反映环形射流泵吸入室内流体剧烈的动量交换对流场的影响，将RNG k-ε (RNG)、Realizable k-ε (RKE)、RSM、Standard k-ω (SKW)、SST k-ω (SST)五种湍流模型和3种壁面处理方法进行组合对比计算，并开展水力实验进行验证。结果表明：不同壁面函数对环形射流泵性能、壁面压力系数的计算影响很小；相较于RNG、SKW、SST，RKE模型或雷诺应力(RSM)模型结合可扩展壁面函数(ScWF)的计算结果与实测更吻合。对比模拟流场发现：低流量比工况下不同湍流模型性能预测结果与模拟的回流区分布范围相关，模拟出来的回流区范围越大，预测的环形射流泵性能越低。基于熵产理论分析认为，环形射流泵的能量损失主要源于分布在壁面和混合剪切层的湍动熵产，高流量比工况下RSM模型计算得到的湍动熵产率偏高，是其预测性能低于RKE模型的主要原因。
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.

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更新日期/Last Update: 2024-10-08