@Article{fdmp.2023.025230,
AUTHOR = {Ridwan, Sher Afghan Khan, Jaffar Syed Mohamed Ali, Mohd. Azan Mohammed Sapardi, Abdul Aabid},
TITLE = {Numerical Analysis of Cavity-Based Control of Base Pressure Variations at Supersonic Mach Numbers},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {19},
YEAR = {2023},
NUMBER = {6},
PAGES = {1655--1678},
URL = {http://www.techscience.com/fdmp/v19n6/51374},
ISSN = {1555-2578},
ABSTRACT = {In the present study, the base pressure variations induced by the presence of a cavity, known to have a strong
influence of the behaviour of supersonic projectiles, are investigated through numerical solution of the balance
equations for mass, momentum, and energy. An area ratio of four is considered and numerical simulations
are carried out at Mach M = 1.2, 1.4, 1.6, and 1.8 assuming no cavity or cavity locations 0.5D, 1D, 1.5D, and
2D. The inlet pressure of the nozzle is considered as a flow variable. The Taguchi method is also used, and
the considered cases are then analyzed using a full factorial experimental design. The results show that the cavity
is effective in increasing the base pressure for the conditions examined. For other nozzle pressure ratios, cavities
do not lead to passive control due the change in the reattachment length. The distribution of wall pressure reveals
that, in general, a cavity used to implement passive control of the base pressure does not adversely influence the
flow pattern in the domain.},
DOI = {10.32604/fdmp.2023.025230}
}