Numerical modeling and analysis of damping derivatives for a 2D wedge at hypersonic mach numbers and variable pivot points

Shaikh, Javed Shoukat and Shetty, Shamitha and Pathan, Khizar Ahmed and Abuj, Narayan Govindrao and Kumar, Krishna and Khan, Sher Afghan and Nema, Anurag A (2025) Numerical modeling and analysis of damping derivatives for a 2D wedge at hypersonic mach numbers and variable pivot points. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 128 (1). pp. 92-107. ISSN 2289-7879

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Abstract

This investigation primarily underscores the numerical modeling of damping derivatives across a two-dimensional wedge at diverse pivot points, particularly for considerable Mach numbers and angles of incidence values. The damping derivative is simulated numerically via regression model analysis. Analytical results are derived by employing Ghosh's two-dimensional piston theory. This study considers factors including Mach number, wedge angle, and pivot position. The current inquiry observes that the wedge angle (θ) spans from 3° to 30°, whereas the Mach number (M) fluctuates between 5.5 and 10.0. Damping derivatives results are acquired through the examination of various Mach numbers (M) and angles of incidence (θ) at multiple pivot locations (h) ranging from 0.0 to 1.0. This research evaluates the damping derivative findings against theoretical forecasts, revealing a notable correlation between them. Research results and theoretical predictions exhibit a remarkable resemblance; however, this study demonstrates that changes in damping derivative are influenced by factors such as Mach number (M), angle of the wedge (θ), and position of the pivot (h). At every pivot position, the damping derivative magnitude diminishes with an increase in Mach number; however, it ascends with an increase in the angle of incidence. This phenomenon is noteworthy because it underscores the complex interplay between these variables (factors), although one might posit that the relationship could be more linear under certain conditions.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Mach number; hypersonic flow; angle of incidence; pivot position
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL500 Aeronautics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering Kulliyyah of Engineering
Depositing User:	Prof. Dr. Sher Afghan Khan
Date Deposited:	17 Mar 2025 11:19
Last Modified:	17 Mar 2025 11:19
URI:	http://irep.iium.edu.my/id/eprint/120267

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