Aerodynamic characteristics of low reynolds number airfoils
Апстракт
Assessment of airfoil aerodynamic characteristics is essential part of any optimal airfoil design procedure. This paper illustrates rapid and efficient method for determination of aerodynamic characteristics of an airfoil, which is based on viscous-inviscid interaction. Inviscid flow is solved by conformal mapping, while viscous effects are determined by solving integral boundary layer equations. Displacement thickness is iteratively added to the airfoil contour by alternating inviscid and viscous solutions. With this approach efficient method is developed for airfoil design by shape perturbations. The procedure is implemented in computer code, and calculation results are compared with results of XFOIL calculations and with experiment. Eppler E387 low Reynolds number airfoil and soft stall S8036 airfoil are used for verification of developed procedure for Reynolds numbers 200000, 350000, and 500000. Calculated drag polars are presented in this paper and good agreement with experiment i...s achieved as long as small separation is maintained. Calculated positions of laminar separation, reattachment, and turbulent separation closely follow experimental measurement. The calculations are performed in relatively short time, which makes this approach suitable for low Reynolds number airfoil design.
Кључне речи:
low Reynolds number / laminar separation bubble / computational aerodynamics, conformal mapping / boundary layer features / airfoil designИзвор:
Tehnički vjesnik, 2017, 24, 1, 111-118Издавач:
- Univ Osijek, Tech Fac, Slavonski Brod
DOI: 10.17559/TV-20160225100019
ISSN: 1330-3651
WoS: 000394519500015
Scopus: 2-s2.0-85012165271
Институција/група
Inovacioni centarTY - JOUR AU - Abobaker, Mostafa AU - Petrović, Zlatko AU - Fotev, Vasko AU - Toumi, Noureddine AU - Ivanović, Ivana PY - 2017 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2516 AB - Assessment of airfoil aerodynamic characteristics is essential part of any optimal airfoil design procedure. This paper illustrates rapid and efficient method for determination of aerodynamic characteristics of an airfoil, which is based on viscous-inviscid interaction. Inviscid flow is solved by conformal mapping, while viscous effects are determined by solving integral boundary layer equations. Displacement thickness is iteratively added to the airfoil contour by alternating inviscid and viscous solutions. With this approach efficient method is developed for airfoil design by shape perturbations. The procedure is implemented in computer code, and calculation results are compared with results of XFOIL calculations and with experiment. Eppler E387 low Reynolds number airfoil and soft stall S8036 airfoil are used for verification of developed procedure for Reynolds numbers 200000, 350000, and 500000. Calculated drag polars are presented in this paper and good agreement with experiment is achieved as long as small separation is maintained. Calculated positions of laminar separation, reattachment, and turbulent separation closely follow experimental measurement. The calculations are performed in relatively short time, which makes this approach suitable for low Reynolds number airfoil design. PB - Univ Osijek, Tech Fac, Slavonski Brod T2 - Tehnički vjesnik T1 - Aerodynamic characteristics of low reynolds number airfoils EP - 118 IS - 1 SP - 111 VL - 24 DO - 10.17559/TV-20160225100019 ER -
@article{ author = "Abobaker, Mostafa and Petrović, Zlatko and Fotev, Vasko and Toumi, Noureddine and Ivanović, Ivana", year = "2017", abstract = "Assessment of airfoil aerodynamic characteristics is essential part of any optimal airfoil design procedure. This paper illustrates rapid and efficient method for determination of aerodynamic characteristics of an airfoil, which is based on viscous-inviscid interaction. Inviscid flow is solved by conformal mapping, while viscous effects are determined by solving integral boundary layer equations. Displacement thickness is iteratively added to the airfoil contour by alternating inviscid and viscous solutions. With this approach efficient method is developed for airfoil design by shape perturbations. The procedure is implemented in computer code, and calculation results are compared with results of XFOIL calculations and with experiment. Eppler E387 low Reynolds number airfoil and soft stall S8036 airfoil are used for verification of developed procedure for Reynolds numbers 200000, 350000, and 500000. Calculated drag polars are presented in this paper and good agreement with experiment is achieved as long as small separation is maintained. Calculated positions of laminar separation, reattachment, and turbulent separation closely follow experimental measurement. The calculations are performed in relatively short time, which makes this approach suitable for low Reynolds number airfoil design.", publisher = "Univ Osijek, Tech Fac, Slavonski Brod", journal = "Tehnički vjesnik", title = "Aerodynamic characteristics of low reynolds number airfoils", pages = "118-111", number = "1", volume = "24", doi = "10.17559/TV-20160225100019" }
Abobaker, M., Petrović, Z., Fotev, V., Toumi, N.,& Ivanović, I.. (2017). Aerodynamic characteristics of low reynolds number airfoils. in Tehnički vjesnik Univ Osijek, Tech Fac, Slavonski Brod., 24(1), 111-118. https://doi.org/10.17559/TV-20160225100019
Abobaker M, Petrović Z, Fotev V, Toumi N, Ivanović I. Aerodynamic characteristics of low reynolds number airfoils. in Tehnički vjesnik. 2017;24(1):111-118. doi:10.17559/TV-20160225100019 .
Abobaker, Mostafa, Petrović, Zlatko, Fotev, Vasko, Toumi, Noureddine, Ivanović, Ivana, "Aerodynamic characteristics of low reynolds number airfoils" in Tehnički vjesnik, 24, no. 1 (2017):111-118, https://doi.org/10.17559/TV-20160225100019 . .