Journal Menu
By: Kush Kumar
Research Scholar, Aerospace Engineering Department, Amity University, Gurgaon, Haryana, India
In this work, the experimental approach was used to study the aerodynamic performance of cylindrical mid-section with various forebody profiles. The aerodynamic characteristics, such as static pressure, axial velocity, and coefficient of pressure for cylindrical mid-section with various forebody profiles were investigated for subsonic speed for the same length-to-diameter ratio. The experimental work was conducted at a flow velocity of approximately 25 m/s and calculations were done for zero degrees angle of attack to demonstrate the flow behavior. The experimental data of each test was compared to find out the deviation between static pressure, and axial velocity. From the study, it is concluded that the sharp tip forebody profiles have a small stagnation region over the cylindrical mid-section and the blunted tip of the forebody has a bigger stagnation region over the cylindrical mid-section, therefore the aerodynamic properties vary over the cylindrical mid-section-due to the shape of various forebody profiles. Thus, the cylindrical mid-section with power series 1.0 forebody reaches greater velocities with low static pressure from leading to the trailing edge.
orebody, aerodynamic performance, cylinder, wind tunnel
Citation:
Refrences:
1. Ranjan GRR, Parmar DV, Raipuria HK, Singh PB. Innovative forebody design of aircraft. In: ASME International Mechanical Engineering Congress and Exposition. Vol. 1. 2015.
2. Chinn SS. Missile configuration design. New York: McGraw-Hill Book Co., Inc.; 1961.
3. Mallick M, Kumar A. Study on drag coefficient for the flow past a cylinder. National Institute of Technology. 201;5(4):301–306.
4. Abide S, Viazzo S. A 2-D compact fourth-order projection decomposition method. J Comput Phys. 2005;206(1):252.
5. Takayama S, Aoki K. Flow characteristics around a rotating grooved circular cylinder with grooves of different depths. J Vis. 2005;8(4):295–303.
6. Gera B, Sharma PK, Singh RK. CFD analysis of 2D unsteady flow around a square cylinder. Int J Appl Eng Res. 2010;1(3):602.
7. Sumer BM, Fredsøe J. Hydrodynamics around cylindrical structures. Advanced Series on Ocean Engineering. Vol. 12. Singapore: World Scientific; 1997.
8. Park J, Kwon K, Choi H. Numerical solution of flow past a circular cylinder at Reynolds numbers up to 160. KSME Int J. 1998;12(6):1200.
9. Zdravkovich MM. Flow around circular cylinders: fundamentals. Vol. 2. New York: Oxford University Press; 2003.
10. Young ME, Ooi A. Turbulence models and boundary conditions for bluff body flow. In: Proceedings of the 15th Australasian Fluid Mechanics Conference; Sydney, Australia; 2004.
11. Oudheusden BWV, Scarano F, Hinsberg NPV, Watt DW. Phase-resolved characterization of vortex shedding in the near wake of a square-section cylinder at incidence. Exp Fluids. 2005;39(1):86.
12. Benim AC, Cagan M, Nahavandi A, Pasqualotto E. RANS predictions of turbulent flow past a circular cylinder over the critical regime. In: Proceedings of the 5th IASME/WSEAS International Conference on Fluid Mechanics and Aerodynamics; Athens, Greece; 2007.
13. Hölzer A, Sommerfeld M. New simple correlation formula for the drag coefficient of non-spherical particles. Powder Technol. 2008;184(3):361.
14. Cao S, Tamura Y. Flow around a circular cylinder in linear shear flows at subcritical Reynolds number. J Wind Eng Ind Aerodyn. 2008;96(10–11):1961.
15. Rajani BN, Kandasamy A, Majumdar S. Numerical simulation of laminar flow past a circular cylinder. Appl Math Model. 2009;33(3):1228–1247
16. Ong MC, Utnes T, Holmedal LE, Myrhaug D, Pettersen B. Numerical simulation of flow around a smooth circular cylinder at very high Reynolds numbers. Mar Struct. 2009;22:142.
17. Bai H, Li JW. Numerical simulation of flow over a circular cylinder at low Reynolds number. Adv Mater Res. 2011;255–260:942.
18. Kozlov IM, Dobergo KV, Gnesdilov N. Application of RES methods for computation of hydrodynamic flows by an example of 2D flow past a circular cylinder for Re = 5–200. Int J Heat Mass Transf. 2011;54(4):887.
19. Butt U, Egbers C. Aerodynamic characteristics of flow over circular cylinders with patterned surface. Int J Mater Mech Manuf. 2013;1(2):121.
