پیوندهای مفید
آمار
| تعداد نشریات | 8 |
| تعداد شماره‌ها | 427 |
| تعداد مقالات | 5,578 |
| تعداد مشاهده مقاله | 6,842,032 |
| تعداد دریافت فایل اصل مقاله | 5,810,635 |
Impact of Canard on the Flowfield over the Wing in Various Flow Regimes | ||
| AUT Journal of Mechanical Engineering | ||
| مقاله 8، دوره 6، شماره 1، خرداد 2022، صفحه 113-128 اصل مقاله (1.89 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajme.2021.20189.5993 | ||
| نویسندگان | ||
| Ali R. Davari* 1؛ M. Soltani2 | ||
| 1Department of Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran | ||
| 2Department of Aerospace Engineering, Sharif University of Technology, Tehran, Iran | ||
| چکیده | ||
| An in-depth study has been undertaken to investigate the vortical flow pattern on a generic canard-wing configuration at the Mach numbers 0.1, 0.8, and 2.0. The results show that the downwash flowfield due to canard decreases the effective angle of attack seen by the front half of the wing by at least 3% or more, which postpones the vortex formation and development. The rear half especially at the outboard section on the other hand is dominated by the canard upwash field, giving rise to the effective angle of attack to at least 5% of the original value. The interaction of the canard vortex with the wing leading edge vortex has been observed to increase the vortex strength and size on the wing. The present results have found a nearly 10% increase in vortex size due to canard-wing vortices interaction. In supersonic flow due to the impact of the oblique shocks and the consequent pressure rise, the primary flow separation to form the leading edge vortex and the vortex break down onsets were shown to occur at higher angles of attack, when compared to those in the transonic regime. The present results could be employed to design and optimization of canard and wing in certain types of aircraft and missiles to enhance maneuverability and operational performance. | ||
| کلیدواژه‌ها | ||
| Vortex burst؛ Vortex core؛ Induced angle of attack؛ Canard؛ Sweep | ||
| مراجع | ||
|
[1] J. Zhang, J. Lei, J. Niu, Numerical investigation of aerodynamic characteristics of free-spinning tail projectile with canards roll control, Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 235(6) (2021) 687-702.
[2] B.B. Gloss, L.W. Mckinney, Canard-wing lift interference related to maneuvering aircraft at subsonic speeds, (1973).
[3] B.B. Gloss, The effect of canard leading edge sweep and dihedral angle on the longitudinal and lateral aerodynamic characteristic of a close-coupled canard-wing configuration, (1974).
[4] B.B. Gloss, Effect of Canard Location and Size on Canard-Wing Interference and Aerodynamic-Center Shift Related to Maneuvering Aircraft at Transonic Speeds. NASA Report, 1974, NASA TN D-7505, (1974).
[5] H.-C. Oelker, D. Hummel, Investigations on the vorticity sheets of a close-coupled delta-canard configuration, Journal of aircraft, 26(7) (1989) 657-666.
[6] D. Hummel, H.C. Oelker, Effects of canard position on the aerodynamic characteristics of a close-coupled canard configuration at low speed, Zeitschrift für Flugwissenschaften und Weltraumforschung, 15(2) (1991) 74-88.
[7] Z. Lu, Z. Lu, A study on flow patterns and aerodynamic characteristics for canard-double delta wing configuration, in: 35th Aerospace Sciences Meeting and Exhibit, 1994, pp. 324.
[8] S. Hayashibara, R. Myose, L. Miller, The effect of a 70 swept canard-on the leading edge vortices of a 70 swept delta wing during dynamic pitching, AIAA Paper 97, 613 (1997).
[9] V.J. Stark, Canard-wing interaction in unsteady supersonic flow, Journal of aircraft, 26(10) (1989) 951-952.
[10] S.K. Hebbar, M.F. Platzer, D.-M. Liu, Effect of canard oscillations on an X-31A-like model in pitching maneuver, Journal of aircraft, 32(5) (1995) 1157-1160.
[11] Q. Chen, T. Hu, P. Liu, Q. Qu, H. Guo, R.A. Akkermans, The dynamic vortical flow behaviour on a coplanar canard configuration during large-amplitude-pitching, Aerospace Science and Technology, 112 (2021) 106553.
[12] S.M. Hitzel, R. Osterhuber, Enhanced maneuverability of a delta-canard combat aircraft by vortex flow control, Journal of Aircraft, 55(3) (2018) 1090-1102.
[13] J. Sahu, F. Fresconi, Computational and Experimental Free-Flight Motion of a Subsonic Canard-Controlled Body, in: 35th AIAA Applied Aerodynamics Conference, 2017, pp. 3400.
[14] S.B. Wibowo, S. Sutrisno, T.A. Rohmat, Computational study of flow interactions over a close coupled canard-wing on fighter, International Journal of Aviation, Aeronautics, and Aerospace, 6(1) (2019) 5.
[15] K.V.R.A.N.K.P.B.S.T. Sudhakar Uppalapati, CFD Analysis on Eurofighter Typhoon at Canard, International Journal of Advanced Science and Technology, 29(9s) (2020) 2408 - 2415.
[16] D. Hummel, G. Redeker, A new vortex flow experiment for computer code validation, NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE), 2003.
[17] D.J. Hummel, The international vortex flow experiment 2 (VFE-2): background, objectives and organization, Aerospace science and technology, 24(1) (2013) 1-9.
[18] J.M. Luckring, D. Hummel, What was learned from the new VFE-2 experiments, Aerospace Science and Technology, 24(1) (2013) 77-88.
[19] M. Hadidoolabi, H. Ansarian, Computational investigation of vortex structure and breakdown over a delta wing at supersonic pitching maneuver, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 40(2) (2018) 1-17.
[20] S.B. Wibowo, B. Basuki, T.A. Rohmat, S. Siswantoro, F. Nugroho, P. Ginting, Z. Anwar, Vortex Dynamics Study and Flow Visualization on Aircraft Model with Different Canard Configurations, Fluids, 6(4) (2021) 144.
[21] Y. Dong, Z. Shi, K. Chen, J. Chen, Experimental investigation of the effects of sideslip on canard-configuration aircraft at high angle of attack, AIP Advances, 9(5) (2019) 055114.
[22] Z. Ali, W. Kuntjoro, W. Wisnoe, I. Ishak, M. Katon, N. Ahmad, Aerodynamics Analysis on the Effect of Canard Aspect Ratio on Blended Wing Body Aircraft using CFD Simulation, in: IOP Conference Series: Materials Science and Engineering, IOP Publishing, 2020, pp. 012015.
[23] M. Soltani, F. Askari, A. Davari, A. Nayebzadeh, Effects of canard position on wing surface pressure, (2010).
[24] M.H. Doolabi and M.A. Rabbani, Numerical investigation of the flowfield over a closely coupled canard-wing configuration in subsonic flow. The 26th annual conference of the Iranian Society of Mechanical Engineers (ISME 2018), Semnan University, Iran 24-26 April, (2018).
[25] A.R. Davari, M.H. Doolabi, M. Soltani, M. Izadkhah, Aspects of canard-wing vortices interaction in subsonic flow, Scientia Iranica, 22(3) (2015) 743-754.
[26] M. Hadidoolabi, H. Ansarian, Computational Investigation of Vortex Breakdown over a Pitching Delta Wing at Supersonic Speeds, Scientia Iranica, 24(6) (2017) 2915-2928. | ||
|
آمار تعداد مشاهده مقاله: 407 تعداد دریافت فایل اصل مقاله: 440 |
||