A systematic assessment of unsteady Reynolds-averaged Navier–Stokes (URANS) models in predicting the complex flow through a suddenly expanding axisymmetric chamber is reported. Five types of URANS models assessed in the study comprise the standard k–ε model, the modified k–ε (1.6) model, the modified k–ε (1.3) model, the renormalization group (RNG) k–ε model, and the shear stress transport (SST) model. To assess the strengths and limitations of these models in predicting the velocity field of this precessing flow, the numerical results are assessed against available experimental results. Good agreement with the flow features and reasonable agreement with the measured phase-averaged velocity field, energy of total fluctuation and precession frequency can be achieved with both the standard k–ε and the SST models. The degree of accuracy in predicting the rate of both spreading and velocity decay of the jet was found to greatly influence the prediction of the precession motion.
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July 2019
Research-Article
Assessment of the Reliability of Two-Equation URANS Models in Predicting a Precessing Flow
Xiao Chen,
Xiao Chen
Center for Energy Technology (CET),
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
Search for other works by this author on:
Zhao F. Tian,
Zhao F. Tian
Center for Energy Technology (CET),
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
Search for other works by this author on:
G. J. Nathan
G. J. Nathan
Center for Energy Technology (CET),
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
Search for other works by this author on:
Xiao Chen
Center for Energy Technology (CET),
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
Zhao F. Tian
Center for Energy Technology (CET),
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
G. J. Nathan
Center for Energy Technology (CET),
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
School of Mechanical Engineering,
The University of Adelaide,
Adelaide, SA 5005, Australia
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received May 31, 2017; final manuscript received January 15, 2019; published online March 4, 2019. Assoc. Editor: Oleg Schilling.
J. Fluids Eng. Jul 2019, 141(7): 071203 (10 pages)
Published Online: March 4, 2019
Article history
Received:
May 31, 2017
Revised:
January 15, 2019
Citation
Chen, X., Tian, Z. F., and Nathan, G. J. (March 4, 2019). "Assessment of the Reliability of Two-Equation URANS Models in Predicting a Precessing Flow." ASME. J. Fluids Eng. July 2019; 141(7): 071203. https://doi.org/10.1115/1.4042748
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