Damping Derivative Evaluation in Pitch for an Ogive at High Mach Numbers
AyshaShabana1, Renita Sharon Monis2, Asha Crasta3, S. A. Khan4
1AyshaShabana, Research Scholar, Mathematics Dept., M.I.T.E, Moodabidri, and Assistant Professor, SCEM, Mangaluru, Karnataka, India.
2Renita Sharon Monis, Research Scholar, Mathematics Dept., M.I.T.E, Moodabidri and Assistant Professor, SMVITM, Bantakal, Karnataka, India.
3AshaCrasta, Associate Professor, Mathematics Department, M.I.T.E, Moodabidri, Karnataka, India.
4S. A. Khan, Professor, Department of Mechanical Engineering, Faculty of Engineering, IIUM, Gombak Campus, Kuala Lumpur, Malaysia.
Manuscript received on September 16, 2019. | Revised Manuscript received on 24 September, 2019. | Manuscript published on October 10, 2019. | PP: 1307-1317 | Volume-8 Issue-12, October 2019. | Retrieval Number: L39831081219/2019©BEIESP | DOI: 10.35940/ijitee.L3983.1081219
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In this paper, the formulae for damping derivative for an ogive with the suppositions of a curve on the conical nose. The damping derivative in pitch is assessed for a broad scope of the inertia levels and the flow deflection angle. The outcome indicates that there is a progressive increase in the damping derivative with an increase in the flow deflection angle. When the inertia level is increased from M = 5 to 9, the damping derivative value diminishes, it becomes independent of inertia level, and later any increase in the Mach number does not yield any change in the magnitude of the damping derivatives, and that indicates the attainment of the Mach number independence principle. It is found from the results that when ogive is superimposed, the positive slope is useful, whereas, the negative slope does not yield any useful results, hence must be avoided in the design of the nose part of the aerospace vehicle design. Due to both either positive or negative slope, there is a considerable shift in the Centre of the pressure of the nose, which is right from the dynamic stability point of view. When the slope increased beyond λ > 10, the pressure distribution is such that the magnitude of the damping derivatives attains very peculiar behavior, and this trend is not acceptable. Hence, such a high value of the λ must be avoided.
Keywords: Indicates the Attainment of the Mach Number Independence Principle.
Scope of the Article: Evaluation of Glazing Systems for Energy Performance