We experimentally investigate a partially shrouded sonic jet (a free-jet shielded by solid wall-extension on one side) exiting from planar nozzle at two different pressure ratio ($\zeta=4$ and $5$). show that the inherent unsteadiness shock-induced flow separation wall emitted noise in far-field is strongly coupled through series of experiments like high-speed schlieren, wall-static pressure, u...

Using a newly constructed airflow imaging system, airflow patterns were visualized that were associated with common, everyday respiratory activities (e.g. breathing, talking, laughing, whistling). The effectiveness of various interventions (e.g. putting hands and tissues across the mouth and nose) to reduce the potential transmission of airborne infection, whilst coughing and sneezing, were als...

The propagation characteristics of an acoustic point source generated using laser-induced plasma (LIP) were investigated experimentally. Experiments performed in a Kevlar-walled hybrid anechoic wind tunnel (HAWT) where the sound LIP was measured 251-element microphone array, while flow speed empty test section varied. time instant formation also captured. far field pressure assessed through arr...

After the failure of maiden flight 157 Ariane 5 Evolution Cryotechnique type A (ECA), inquiry board responsible for investigation reported as one probable causes “non-exhaustive definition loads to which Vulcain 2 engine is subjected during flight.” As a result, many research activities were set up with objective isolate driving mechanisms. Driving mechanisms such pumping, flapping, or swinging...

Efforts to improve the efficiency of internal combustion engines in applications such as heavy-duty vehicles where electric propulsion is currently unfeasible or need complementing are essential. However, studying conditions actual whilst accessing their chambers they operation remains difficult. To allow for characterization practical operating diesel engine designs, detailed studies examining...

Abstract This study investigates the phenomenon of jetting axial flow induced by nanosecond repetitively pulsed discharges (NRPD) in quiescent ambient air a pin-to-pin electrode configuration. Axial stratification discharge parameters (electron number density, temperature, specific energy, etc) influences hydrodynamic effects leading to directed gas from cathode towards anode. The experimental ...