Numerical and analytical evaluation of airship configuration
DOI:
https://doi.org/10.21152/1750-9548.16.4.337Abstract
Today, airships have many uses and have been considered because they combine the benefits of a ship and an aircraft and the low cost of energy consumption. In this research, with the help of numerical solutions and analytical solutions in Datcom, three common configurations of an airship at various angles of attack are investigated. The results of numerical and analytical solutions are compared. Flow condition was considered at an altitude of 4 km above the ground. The same results are not obtained in numerical and analytical solutions. Certainly, numerical results can be cited more than analytical solutions because Datcom software has computational errors and has been simplified. It has been developed for the analytical flow solution on the slender body. However, despite the existing error, this software can be used to extract computational processes and sensitization some parameters. The results show that the approach of the tail fins to the tip of the airship increases the lift-to-drag ratio, and with increasing the length-to-diameter ratio, the aerodynamic performance also improves. In all variants, converting the fins to a cross-type variant improves the vehicle's aerodynamic performance.
References
Carrión M, Steijl R, Barakos G, Stewart D. Analysis of hybrid air vehicles using computational fluid dynamics. Journal of Aircraft. 2016;53(4):1001-12. https://doi.org/10.2514/1.C033402
Technical manual of airship aerodynamics, war department, February 1941. TM1-320.
El Omari K, Schall E, Koobus B, Dervieux A. Turbulence modeling challenges in airship CFD studies. Monografías del SeminarioMatemáticoGarcía de Galdeano. 2004(31):545-54.
Shields K. CFD applications in airship design. 2010.
Voloshin V, Chen YK, Calay RK. A comparison of turbulence models in airship steady-state CFD simulations. arXiv preprint arXiv:12102970. 2012.
Andan AD, Asrar W, Omar AA. Investigation of aerodynamic parameters of a hybrid airship. Journal of Aircraft. 2012;49(2):658-62. https://doi.org/10.2514/1.C031491
Liu P, Fu G-y, Zhu L-j, Wang X-l. Aerodynamic characteristics of airship Zhiyuan-1. Journal of Shanghai Jiaotong University (Science). 2013;18(6):679-87. https://doi.org/10.1007/s12204-013-1443-9
Yanxiang C, Yanchu Y, Jianghua Z, Xiangqiang Z, editors. Numerical aerodynamic investigations on stratospheric airships of different tail configurations. 2015 IEEE Aerospace Conference; 2015: IEEE. 10.1109/AERO.2015.7118977
Mendonça Junior JL, Santos JS, Morales MA, Goes LC, Stevanovic S, Santana RA, editors. Airship aerodynamic coefficients estimation based on computational method for preliminary design. AIAA Aviation 2019 Forum; 2019. https://doi.org/10.2514/6.2019-2982
Noori S, Akbari A, Spahvand P. A numerical investigation on the roll damping coefficient of a typical airship based on the computational fluid dynamics. Journal of Aerospace Science and Technology. 2021;14(2).
Beheshti B, Soller A, Wittmer F, Abhari R, editors. Experimental investigation of the aerodynamic drag of a high altitude airship. 7th AIAA ATIO Conf, 2nd CEIAT Int'l Conf on Innov and Integr in Aero Sciences, 17th LTA Systems Tech Conf; followed by 2nd TEOS Forum; 2007. https://doi.org/10.2514/6.2007-7894
Sun X-Y, Li T-E, Lin G-C, Wu Y. A study on the aerodynamic characteristics of a stratospheric airship in its entire flight envelope. Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering. 2018;232(5):902-21. https://doi.org/10.1177/0954410017723358
Slotnick JP, editor Integrated CFD validation experiments for prediction of turbulent separated flows for subsonic transport aircraft. NATO Science and Technology Organization, Meeting Proceedings RDP, STO-MP-AVT-307; 2019.
Yang Y, Xu X, Zhang B, Zheng W, Wang Y. Bionic design for the aerodynamic shape of a stratospheric airship. Aerospace Science and Technology. 2020; 98:105664. https://doi.org/10.1016/j.ast.2019.105664
Manikandan M, Pant RS. Research and advancements in hybrid airships-A review. Progress in Aerospace Sciences. 2021; 127:100741. https://doi.org/10.1016/j.paerosci.2021.100741
Ceruti A, Voloshin V, Marzocca P. Heuristic algorithms applied to multidisciplinary design optimization of unconventional airship configuration. Journal of Aircraft. 2014;51(6):1758-72. https://doi.org/10.2514/1.C032439
Liu J-m, Lu C-j, Xue L-p. Numerical investigation on the aeroelastic behavior of an airship with hull-fin configuration. Journal of Hydrodynamics, Ser B. 2010;22(2):207-13. https://doi.org/10.1016/S1001-6058(09)60046-9
Li Y, Nahon M, Sharf I. Airship dynamics modeling: A literature review. Progress in aerospace sciences. 2011;47(3):217-39. https://doi.org/10.1016/j.paerosci.2010.10.001
Wang X-L, Fu G-Y, Duan D-P, Shan X-X. Experimental investigations on aerodynamic characteristics of the ZHIYUAN-1 airship. Journal of aircraft. 2010;47(4):1463-8. https://doi.org/10.2514/1.C000243
Fluent A. Ansys fluent theory guide. Ansys Inc, USA. 2011; 15317:724-46.
Monk D, Chadwick EA, editors. Comparison of turbulence models effectiveness for a delta wing at low Reynolds numbers. 7th European conference for aeronautics and space sciences (EUCASS); 2017. 10.13009/EUCASS2017-653
Vukelich S, Williams J. The USAF Stability and Control DATCOM: Volume I, Users Manual. Tech. Rep. AFFDL-TR-79-3032 [user guide], McDonnel Douglas Astronautics; 1979.
Liao L, Pasternak I. A review of airship structural research and development. Progress in Aerospace Sciences. 2009;45(4-5):83-96. https://doi.org/10.1016/j.paerosci.2009.03.001
Funk P, Lutz T, Wagner S. Experimental investigations on hull-fin interferences of the LOTTE airship. Aerospace Science and Technology. 2003;7(8):603-10. https://doi.org/10.1016/S1270-9638(03)00058-0
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