2019
Yin, Tingyun; Pavesi, Giorgio; Pei, Ji; Yuan, Shouqi; Daniel, Nana Adu
Comparison of Various Turbulence Models Applied to a Twisted Hydrofoil Journal Article
In: Proceedings of the 10th International Symposium on Cavitation (CAV2018), iss. 5, pp. 269-275, 2019.
Abstract | Links | BibTeX | Tags: Cavitation, Turbulence Model, Twisted Hydrofoil, unsteady shedding
@article{Yin2019,
title = {Comparison of Various Turbulence Models Applied to a Twisted Hydrofoil},
author = {Tingyun Yin and Giorgio Pavesi and Ji Pei and Shouqi Yuan and Nana Adu Daniel},
doi = {10.1115/1.861851_ch52},
year = {2019},
date = {2019-01-01},
journal = {Proceedings of the 10th International Symposium on Cavitation (CAV2018)},
issue = {5},
pages = {269-275},
abstract = {Comparison of various turbulence models applied to a twisted hydrofoil 1,2Tingyun Yin; 2Giorgio Pavesi, 1Ji Pei*, 1Shouqi Yuan, 1Nana Adu Daniel 1National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China; 2Department of Industrial Engineering, University of Padova, Padova 35131, Italy Abstract In the paper, various turbulence models are compared and different modifications employed to investigate more in deep to what extent the RANS are applicable to simulate the unsteady cavitating flow around a twisted foil. The predicted vapor shedding frequency and lift force coefficient are compared with the experimental data. Moreover, the dynamics behavior induced by the cavitation is discussed in detail. The results show that frequency predicted by density correction based model (DCM) SST is much closer to the experimental data, but the model fails to predict the second shedding vapor. In general, DCM RNG shows a better prediction ability. Firstly, a vapor cloud is sheared toward downstream due to the effect of main flow and re-entrant flow. After that, the second shedding vapor catches up with the first one and becomes the main vapor. The oscillation of the lift coefficient changes consistently with the vapor fluctuations and when a second vapor shedding is highlighted, a second peak value occurs in the time history of lift coefficient.},
keywords = {Cavitation, Turbulence Model, Twisted Hydrofoil, unsteady shedding},
pubstate = {published},
tppubtype = {article}
}
Comparison of various turbulence models applied to a twisted hydrofoil 1,2Tingyun Yin; 2Giorgio Pavesi, 1Ji Pei*, 1Shouqi Yuan, 1Nana Adu Daniel 1National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China; 2Department of Industrial Engineering, University of Padova, Padova 35131, Italy Abstract In the paper, various turbulence models are compared and different modifications employed to investigate more in deep to what extent the RANS are applicable to simulate the unsteady cavitating flow around a twisted foil. The predicted vapor shedding frequency and lift force coefficient are compared with the experimental data. Moreover, the dynamics behavior induced by the cavitation is discussed in detail. The results show that frequency predicted by density correction based model (DCM) SST is much closer to the experimental data, but the model fails to predict the second shedding vapor. In general, DCM RNG shows a better prediction ability. Firstly, a vapor cloud is sheared toward downstream due to the effect of main flow and re-entrant flow. After that, the second shedding vapor catches up with the first one and becomes the main vapor. The oscillation of the lift coefficient changes consistently with the vapor fluctuations and when a second vapor shedding is highlighted, a second peak value occurs in the time history of lift coefficient.
