Accuracy of Turbulent Closure Models in Calculation of Thrust of a Low Reynolds Number Airfoil Used as a Propeller



DOI: https://doi.org/10.25077/metal.6.1.38-42.2022

Author(s)

Adek Tasri (Mechanical Engineering Department, Universitas Andalas, Indonesia) Orcid ID

Abstract


Unlike in the case of high Reynolds number airfoil, selecting a turbulent closure model for the low Reynolds number airfoil is still a challenge. A turbulent model used for high Reynolds number airfoil is not necessarily suitable for low Reynolds number airfoil due to the presence of separation bubbles in the low Reynolds number airfoil. In this study, we used two simple turbulent models, Spalart-Allmaras and k- , in calculating thrust coefficient of low Reynolds number airfoil used as propeller to determine their accuracy. It was found that there was a significant discrepancy between the numerical calculation results by both the turbulent model and the experimental data.  The k-  was a little more accurate than Spalart-Allmaras turbulent closure model.

Keywords


Low Re number; Airfoil; Propeller

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References


Wilcox (1994), Turbulent modeling for CFD, DCW Industries, USA.

A. Choudhry, M. Arjomandi, and R. Kelso, (2015), “A study of long separation bubble on thick airfoils and its consequent effects”, International Journal of Heat and Fluid Flow, vol. 52, pp. 84–96. doi: 10. 1016/j.ijheatfluidflow.2014.12.001

F.W. Hong and S.T. Dong, (2010), “Numerical analysis for circulation distribution of

propeller blade,” Journal of Hydrodynamics, vol. 22, no. 4. pp. 488–493.

W. Tian, B. Song, J. VanZwieten, and P. Pyakurel (2015), “Computational Fluid

Dynamics Prediction of a Modified Savonius Wind Turbine with Novel Blade

Shapes,” Energies, vol. 8, no. 8, pp. 7915–7929.

M. Stajuda, M. Karczewski, D. Obidowski and K. Jozwik (2016), “ Development CFD model for propeller simulation”, Mechanics and Mechanical Engineering, vol. 20, no. 4 pp.579–593.

P. Spalart, S. Allmaras, “A one-equation turbulence model for aerodynamic flows”. In 30th aerospace sciences meeting and exhibit 1992.

] P.R. Spalart and S.R. Allmaras (1992), “A one-equation turbulence model for aerodynamic flows”, AIAA, vol.092, no. 0439.

H. K. Versteeg and W. Malalasekera (2007), An introduction to computational fluid dynamics: the finite volume method. Pearson Education.

D.C. Wilcox (1988), “Reassessment of the Scale-determining Equation for Advanced

Turbulence Models”, AIAA J., vol. 26, no. 11, pp. 1299–1310.

D.C. Wilcox, (1993), “Comparison of Two-equation Turbulence Models for

Boundary Layers with Pressure Gradients”, AIAA J., vol. 31, no. 8, pp. 1414 – 1421.

R.W. Deters, G.K. Ananda Krishnan, M.S. Selig.” Reynolds number effects on the performance of small-scale propellers”, In 32nd AIAA applied aerodynamics conference 2014.


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