Influence of Different Turbulence Models on Flow Field Simulation of Nozzle Adjustable Jet Pump

DOI

10.2991/iceep-17.2017.177How to use a DOI?

Keywords

Adjustable jet pump; Turbulence model; Wall function; Numerical simulation

Abstract

In order to find a turbulent flow model which can accurately describe the internal mixing process of the nozzle adjustable jet pump, 8 combinations made up by four turbulence models (Standard κ–ξ, RNG κ–ξ, Realizable κ–ξ and RSM) and two wall functions (Standard wall functions and Non-Equilibrium wall functions) were simulated and analyzed. Taking a nozzle adjustable jet pump as an example, the simulation of 8 models were carried out when the opening of the jet pump at 50%, 60%, 70%, 75% and 90%, respectively. And then the field tests were carried out. The comparison between the simulation results and the experimental data of the pressure ratio and efficiency curve was studied. And the turbulent kinetic energy distribution of the jet pump in different models was analyzed. The results show that: the difference of the wall function has little effect on the simulation results, the difference of the curve is mainly caused by differences in turbulence models. The error between the simulated value and the test value of each model decreases with the increase of opening degree and pressure ratio. The simulation results of the RNG κ–ξmodel have larger deviation compare with the experimental results, therefore it's not suitable for the simulation of the jet pump. The simulation results of Standard κ–ξ and RSM model are similar, but exist errors. Realizable κ–ξ model can predict the internal flow of the nozzle jet pump well, and it is in good agreement with the experimental data. The Non-Equilibrium wall function is more suitable for the simulation of jet flow, which is closer to the experimental value than the standard wall function. Therefore, the accurate performance prediction and flow field details can be obtained by the combination of Realizable κ–ξ model and non-equilibrium wall function.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xuhe Zhao
AU  - Tingjun Yan
AU  - Xiaohe Wang
PY  - 2017/06
DA  - 2017/06
TI  - Influence of Different Turbulence Models on Flow Field Simulation of Nozzle Adjustable Jet Pump
BT  - Proceedings of the 2017 6th International Conference on Energy and Environmental Protection (ICEEP 2017)
PB  - Atlantis Press
SP  - 1021
EP  - 1028
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceep-17.2017.177
DO  - 10.2991/iceep-17.2017.177
ID  - Zhao2017/06
ER  -