Base Pressure Control with Semi-Circular Ribs at Critical Mach Number  

作　　者：Ambareen Khan Sher Afghan Khan Mohammed Nishat Akhtar Abdul Aabid Muneer Baig 

机构地区：[1]School of Aerospace Engineering,Universiti Sains Malaysia,Penang,11600,Malaysia [2]Department of Mechanical and Aerospace Engineering,Faculty of Engineering,International Islamic University Malaysia,Kuala Lumpur,59000,Malaysia [3]Department of Engineering Management,College of Engineering,Prince Sultan University,P.O.Box 66833,Riyadh,11586,Saudi Arabia

出　　处：《Fluid Dynamics & Materials Processing》2024年第9期2007-2028,共22页流体力学与材料加工（英文）

基　　金：supported by the Structures and Materials(S&M)Research Lab of Prince Sultan University;support of Prince Sultan University in paying the article processing charges(APC)for this publication.

摘　　要：When better fuel-air mixing in the combustion chamber or a reduction in base drag are required in vehicles,rockets,and aeroplanes,the base pressure control is activated.Controlling the base pressure and drag is necessary in both scenarios.In this work,semi-circular ribs with varying diameters(2,4,and 6 mm)positioned at six distinct positions(0.5D,1D,1.5D,2D,3D,and 4D)inside a square duct with a side of 15 mm are proposed as an efficient way to apply the passive control technique.In-depth research is done on optimising rib size for various rib sites.According to this study,the base pressure rises as rib height increases.Furthermore,the optimal location for the semi-circular ribs with a diameter of 2 mm is at 0.5D.The 1D location appears to be optimal for the 4 mm size as well.For the 6 mm size,however,the 4D position fills this function.

关 键 词：Base pressure nozzle pressure ratio base drag sonic Mach number passive control 

分 类 号：O35[理学—流体力学]