Initial development of the hybrid semielliptical-dolphin airfoil
Апстракт
Iosif Taposu has formulated a mathematical model and generated a family of air-foils whose geometry resembles the dolphin shape. These airfoils are characterized by a sharp leading edge and experiments have proven that they can achieve better aerodynamic characteristics at very high angles of attack than certain classical airfoils, with the nose geometry inclined downwards. On the other hand, they have not been applied to any commercial general aviation aircraft. The authors of this paper have been motivated to compare the aerodynamic characteristics of widely used NACA 2415 airfoil with Taposu???s Dolphin that would have the same princi-pal geometric characteristics. A CFD calculation model has been established and applied on NACA 2415. The results were compared with NACA experiments and very good agreements have been achieved in the major domains of lift and polar curves. The same CFD model has been applied on the counterpart Dolphin 2415. Results have shown that the Dolphin has a sl...ightly higher lift/drag ratio in the lift coefficient domain 0.1-0.35 than NACA. On the other hand, at higher and lower lift coefficients, its aerodynamic characteristics were drastically below those of the NACA section, due to the unfavorable influence of the Dolphin???s sharp nose. A series of the Dolphin???s leading edge modifications has been investigated, gradually improving its aerodynamics. Finally, version M4, consisting of about 70% of Dol-phin???s original rear domain and 30% of the new nose shape, managed to exceed the NACA???s characteristics, thus paving the way to investigate the Dolphin hybrids that could be suitable for the general aviation industry.
Кључне речи:
turbulence / leading edge modification / hybrid design / Dolphin airfoil / computational aerodynamicsИзвор:
Thermal Science, 2022, 26, 3, 2199-2210Издавач:
- Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
DOI: 10.2298/TSCI210515234D
ISSN: 0354-9836
WoS: 000805859400015
Scopus: 2-s2.0-85131414547
Институција/група
Inovacioni centarTY - JOUR AU - Dančuo, Zorana AU - Kostić, Ivan AU - Kostić, Olivera AU - Bengin, Aleksandar AU - Vorotović, Goran PY - 2022 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3712 AB - Iosif Taposu has formulated a mathematical model and generated a family of air-foils whose geometry resembles the dolphin shape. These airfoils are characterized by a sharp leading edge and experiments have proven that they can achieve better aerodynamic characteristics at very high angles of attack than certain classical airfoils, with the nose geometry inclined downwards. On the other hand, they have not been applied to any commercial general aviation aircraft. The authors of this paper have been motivated to compare the aerodynamic characteristics of widely used NACA 2415 airfoil with Taposu???s Dolphin that would have the same princi-pal geometric characteristics. A CFD calculation model has been established and applied on NACA 2415. The results were compared with NACA experiments and very good agreements have been achieved in the major domains of lift and polar curves. The same CFD model has been applied on the counterpart Dolphin 2415. Results have shown that the Dolphin has a slightly higher lift/drag ratio in the lift coefficient domain 0.1-0.35 than NACA. On the other hand, at higher and lower lift coefficients, its aerodynamic characteristics were drastically below those of the NACA section, due to the unfavorable influence of the Dolphin???s sharp nose. A series of the Dolphin???s leading edge modifications has been investigated, gradually improving its aerodynamics. Finally, version M4, consisting of about 70% of Dol-phin???s original rear domain and 30% of the new nose shape, managed to exceed the NACA???s characteristics, thus paving the way to investigate the Dolphin hybrids that could be suitable for the general aviation industry. PB - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd T2 - Thermal Science T1 - Initial development of the hybrid semielliptical-dolphin airfoil EP - 2210 IS - 3 SP - 2199 VL - 26 DO - 10.2298/TSCI210515234D ER -
@article{ author = "Dančuo, Zorana and Kostić, Ivan and Kostić, Olivera and Bengin, Aleksandar and Vorotović, Goran", year = "2022", abstract = "Iosif Taposu has formulated a mathematical model and generated a family of air-foils whose geometry resembles the dolphin shape. These airfoils are characterized by a sharp leading edge and experiments have proven that they can achieve better aerodynamic characteristics at very high angles of attack than certain classical airfoils, with the nose geometry inclined downwards. On the other hand, they have not been applied to any commercial general aviation aircraft. The authors of this paper have been motivated to compare the aerodynamic characteristics of widely used NACA 2415 airfoil with Taposu???s Dolphin that would have the same princi-pal geometric characteristics. A CFD calculation model has been established and applied on NACA 2415. The results were compared with NACA experiments and very good agreements have been achieved in the major domains of lift and polar curves. The same CFD model has been applied on the counterpart Dolphin 2415. Results have shown that the Dolphin has a slightly higher lift/drag ratio in the lift coefficient domain 0.1-0.35 than NACA. On the other hand, at higher and lower lift coefficients, its aerodynamic characteristics were drastically below those of the NACA section, due to the unfavorable influence of the Dolphin???s sharp nose. A series of the Dolphin???s leading edge modifications has been investigated, gradually improving its aerodynamics. Finally, version M4, consisting of about 70% of Dol-phin???s original rear domain and 30% of the new nose shape, managed to exceed the NACA???s characteristics, thus paving the way to investigate the Dolphin hybrids that could be suitable for the general aviation industry.", publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd", journal = "Thermal Science", title = "Initial development of the hybrid semielliptical-dolphin airfoil", pages = "2210-2199", number = "3", volume = "26", doi = "10.2298/TSCI210515234D" }
Dančuo, Z., Kostić, I., Kostić, O., Bengin, A.,& Vorotović, G.. (2022). Initial development of the hybrid semielliptical-dolphin airfoil. in Thermal Science Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 26(3), 2199-2210. https://doi.org/10.2298/TSCI210515234D
Dančuo Z, Kostić I, Kostić O, Bengin A, Vorotović G. Initial development of the hybrid semielliptical-dolphin airfoil. in Thermal Science. 2022;26(3):2199-2210. doi:10.2298/TSCI210515234D .
Dančuo, Zorana, Kostić, Ivan, Kostić, Olivera, Bengin, Aleksandar, Vorotović, Goran, "Initial development of the hybrid semielliptical-dolphin airfoil" in Thermal Science, 26, no. 3 (2022):2199-2210, https://doi.org/10.2298/TSCI210515234D . .