Research
Below are listed research areas being pursued in our group. Clicking on them will give one more details.
Transonic buffet in wings and wing-sections
Transonic buffet refers to shock oscillations due to shock induced boundary layer separation at transonic Mach numbers of the free stream flow. Transonic buffer can occur in laminar, transitional, and fully turbulent flow. We are interested in understanding the nature of transonic buffet over rigid and flexible airplane fuselage-wing using high resolution computational fluid dynamic algorithms such as DES/DDES, together with modal analysis, and stability analysis of flows.
Transonic flow over a delta wing is dominated by highly vortical flow; shock-vortex interaction at moderate and high angle of attack could lead to vortex breakdown. The research here is focused on investigating shock-vortex and vortex-vortex interactions over a rigid and flexible delta and compound delta wing configuration using high resolution numerical algorithms such as URANS/DES/DDES.
Shock buffet in transonic fan rotor-stator configuration is a possibility and could lead to pressure fluctuations causing aerodynamic mistuning and blade fatigue and failure. High resolution CFD algorithms are used to investigate transonic buffet in axial fan rotor-stator to understand its nature.
Hypersonic aerothermoelasticity
Hypersonic intakes comprise compression ramp, intake cowl, and isolator. Aero-thermo-elastic instability and response of the intake can cause performance degradation of the scramjet engine. External hypersonic flow over a ramp interacting with a control surface such as a fin could cause aeroelastic flutter.
