TY - EJOU
AU - Shabana, Aysha
AU - Crasta, Asha
AU - Khan, Sher Afghan
AU - Aabid, Abdul
AU - Baig, Muneer
TI - Computation of Stiffness and Damping Derivatives of an Ogive in a Limiting Case of Mach Number and Specific Heat Ratio
T2 - Fluid Dynamics \& Materials Processing
PY - 2023
VL - 19
IS - 5
SN - 1555-2578
AB - This work aims to compute stability derivatives in the Newtonian limit in pitch when the Mach number tends to
infinity. In such conditions, these stability derivatives depend on the Ogive’s shape and not the Mach number.
Generally, the Mach number independence principle becomes effective from M = 10 and above. The Ogive nose
is obtained through a circular arc on the cone surface. Accordingly, the following arc slopes are considered λ = 5,
10, 15, −5, −10, and −15. It is found that the stability derivatives decrease due to the growth in λ from 5 to 15 and
vice versa. For λ = 5 and 10, the damping derivative declines with an increase in λ from 5 to 10. Yet, for the
damping derivatives, the minimum location remains at a pivot position, h = 0.75 for large values of λ. Hence,
when λ = −15, the damping derivatives are independent of the cone angles for most pivot positions except in
the early twenty percent of the leading edge.
KW - Aerodynamic; stability derivative; Mach number; specific heat ratio; Ogive
DO - 10.32604/fdmp.2023.023158