Investigating the Effect of Geometric Shape on Air Cushion Lift Force

Journal of Marine Science and Application - 2024
Hamed Petoft1, Vahid Fakhari1, Abbas Rahi1
1Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, Tehran, Iran

Tóm tắt

One of the crucial and challenging issues for researchers is presenting an appropriate approach to evaluate the aerodynamic characteristics of air cushion vehicles (ACVs) in terms of system design parameters. One of these issues includes introducing a suitable approach to analyze the effect of geometric shapes on the aerodynamic characteristics of ACVs. The main novelty of this paper lies in presenting an innovative method to study the geometric shape effect on air cushion lift force, which has not been investigated thus far. Moreover, this paper introduces a new approximate mathematical formula for calculating the air cushion lift force in terms of parameters, including the air gap, lateral gaps, air inlet velocity, and scaling factor for the first time. Thus, we calculate the aerodynamic lift force applied to nine different shapes of the air cushions used in the ACVs in the present paper through the ANSYS Fluent software. The geometrical shapes studied in this paper are rectangular, square, equilateral triangle, circular, elliptic shapes, and four other combined shapes, including circle-rectangle, circle-square, hexagonal, and fillet square. Results showed that the cushion with a circular pattern produces the highest lift force among other geometric shapes with the same conditions. The increase in the cushion lift force can be attributed to the fillet with a square shape and its increasing radius compared with the square shape.

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Tài liệu tham khảo

Ai T, Fan W, Xu B, Xiang C, Zhang Y, Zhao Z (2021) Aerodynamic analysis and modeling of coaxial ducted fan aircraft with the ceiling effect. Engineering Applications of Computational Fluid Mechanics 15(1): 1563–1584

Berkeley University Hyperloop Team (2018) SpaceX Hyperloop Pod Competition. Available from https://hypershot.berkeley.edu/ [Accessed on Nov. 29, 2023]

Chang Y, Moretti P (1999) Aerodynamic characteristics of pressure-pad air bars. J Appl Mech. 67(1): 177–182

Chen XD, He XM (2006) The effect of the recess shape on performance analysis of the gas-lubricated bearing in optical lithography. Tribology International 39: 1336–1341

Cole RE, Neu WL (2019) Validation of a commercial fluid-structure interaction solver with applications to air cushion vehicle flexible seals. Ocean Engineering 189: 106287

Drexel Unversity Hyperloop Team (2017) SpaceX Hyperloop Pod Competition. Available from https://research.coe.drexel.edu/mem/dssl/hyperloop/aboutus/ [Accessed on Nov. 29, 2023]

Jiang Y, Tang W (2022) Numerical investigation on water entry of a three-dimensional flexible bag of an air cushion vehicle. Ocean Engineering 247: 110653

Kaya K, Özcan O (2013) A numerical investigation on aerodynamic characteristics of an air-cushion vehicle. Journal of Wind Engineering and Industrial Aerodynamics 120: 70–80

Li N, Liu Y, Gao J, Huang Z, Wang L (2022) Aerodynamic damping and amplitude response of piezoelectric fans in free and confined space. Engineering Applications of Computational Fluid Mechanics 16(1): 161–176

Li Y, Li J, Ling X, Wang Z, Fu T, Han Y (2017) Optimization and aerodynamic characteristics of new air-cushion nozzle of floating furnace for automobile body sheet. Journal of Harbin Institute of Technology (New Series) 24(1): 57–64

Lu Y, Li Z, Chang X, Chuang Z, Xing J (2021) An aerodynamic optimization design study on the bio-inspired airfoil with leading-edge tubercles. Engineering Applications of Computational Fluid Mechanics 15(1): 292–312

Martins JRRA (2022) Aerodynamic design optimization: Challenges and perspectives. Computers & Fluids 239: 105391

McGinniss JR (2017) System design of a high speed ground vehicle lifted by air bearings. Master thesis, University of Texas at Austin

Musk E (2013) Hyperloop Alpha. SpaceX: Hawthorne, USA. Available from https://www.tesla.com/sites/default/files/blog_images/hyperloop-alpha.pdf [Accessed on Nov. 29, 2023]

Pavăl M, Popescu A, Popescu T, Zahariea D, Husaru D (2018) Numerical study on the movement of air inside the inner cavity of a hovercraft model. Proceedings of the IOP Conference Series: Materials Science and Engineering 444(8): 082005

Pavăl M, Popescu A, Zahariea D (2019) Numerical analysis of the influence of the lower hull angle of a round skirtless air cushion vehicle. Proceedings of the IOP Conference Series: Materials Science and Engineering 595(1): 012049

Pavăl M, Popescu A, Zahariea D (2020a) CFD analysis of a round shaped air cushion vehicle with flexible skirt segments at 90° and different air clearance height. Proceedings of the IOP Conference Series: Materials Science and Engineering 68(3): 137–150

Pavăl M, Popescu A, Zahariea D (2020b) CFD analysis of a round shaped air cushion vehicle with inclined skirt segments. Proceedings of the IOP Conference Series: Materials Science and Engineering 997(1): 012152

Sadeghi H, Pourfallah M, Molla-Alipour M, Darzi AR (2020) Numerical investigation of lift force increase in a hovercraft by changing the geometrical parameters of flow transfer part and air channel. Journal of Marine Engineering 15(30): 81–92

Saeid NH, Yunus E, Fei OC (2014) CFD simulation of air flow around a hovercraft. 5th Brunei International Conference on Engineering and Technology (BICET 2014), 39(11): 1336–1341

Sayan RKS, Walter M, Michael F, Rohan D (2016) Georgia Hyperloop Team Final Pod Design Briefing. SpaceX Hyperloop Design Competition. Available from GT Hyperloop Pod Final Design Briefing Presentation ∣ PPT (slideshare. net) [Accessed on Nov. 29, 2023]

Siddique PMMA, Raj LP (2023) Sensitivity analysis of geometric parameters on the aerodynamic performance of a multi-element airfoil. Aerospace Science and Technology 132: 108074

Soltaninejad M, Azarsina F, Javid A (2015) Analysis of air injection system for drag reduction in high speed vessels using numerical simulation software ANSYS-Fluid flow. International Journal of Marine Science and Engineering 5(2): 65–75

Williams A, Collu M, Patel MH (2010) Aerodynamic lift forces on multihulled marine vehicles. International Journal of Maritime Engineering 152(A2-June): A-41

Xu S, Chen K, Tang Y, Xiong Y, Ma T, Tang W (2021) Research on the transverse stability of an air cushion vehicle hovering over the rigid ground. Ships and Offshore Structures 17(10): 2300–2316

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Journal of Marine Science and Application

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