LDI Alumni Profile
Past FYP student; Completed LDI imaging project
Dept. Mechanical & Aerospace Engineering, Monash University Clayton Campus
Supervisors: Associate Professor Andreas Fouras
Vaibhav first joined LDI as a Summer Research Project student in November 2008 and completed his Final Year Project (FYP) as a 4th year undergraduate student in 2009. With success from his FYP, Vaibhav continued studying jet shock cells and surface topography with LDI postgraduate student Ivan Ng, leading to a series of publications (listed below). Vaibhav is currently undertaking postgraduate studies at Stanford University, USA.
Qualifications:BAeroEng (Hons) Monash 2010, BCom (Management) Monash 2010
- The Visualization Society of Japan (VSJ) Award for Excellent Visualization in 2011, for Surface Topography of Jet Shock Cells in an Hydraulic Analogy. Journal of Visualisation, 13(3), 175–176, doi: 10.1007/s12650-010-0032-3
LDI project topic:Determining flow properties in the near-field of a supersonic jet nozzle exit using a hydraulic analogy
LDI project details:
The flow behind jet nozzles has been of great interest due to its effects on the aerodynamics, structure and propulsion system of an aircraft. The first shock cells at the exit of an underexpanded jet provide valuable information about the flow properties, such as pressure variations, acoustic vibrations, viscous effects, etc. A thorough understanding of the velocity flow field and pressure distribution at the nozzle exit can assist in various studies, such as the investigation of screech, which is an aeroacoustic phenomenon potentially harmful for aircraft structures. This study examines the flow regime more closely to assist in the development of more appropriate screech control mechanisms and more efficient propulsion systems.
The fundamental approach employed in this study is Particle Image Velocimetry, in which two subsequent images are compared to calculate the instantaneous displacement and velocity. A reference image can be compared with its distorted version, producing apparent displacement vectors to reconstruct the surface topography of water flow. Hydraulic flow on a water table is used as an analogy for supersonic air flow. Inherently, this is a simple, cost-effective and highly accurate technique.
Application of Particle Image Velocimetry and Reference Image Topography to jet shock cells using the hydraulic analogy. Experiments in Fluids, 51(2), 543–551.
Experimental study of simultaneous measurement of velocity and surface topography: In the wake of a circular cylinder at low Reynolds number. Experiments in Fluids, 50(3), 587–595.
Surface Topography of Jet Shock Cells in an Hydraulic Analogy. Journal of Visualisation, 13(3), 175–176.
- (2009) Hydraulic Analogy Examination of Underexpanded Jet Shock Cells using Reference Image Topography, in Proc. 8th International Symposium on Particle Image Velocimetry — PIV09, Melbourne, Australia, 25–28 August 2009.
- (2009) Experimental study of instantaneous measurement of velocity and surface topography in a wake of the circular cylinder at low Reynolds number, in Proc. 8th International Symposium on Particle Image Velocimetry — PIV09, Melbourne, Australia, 25–28 August 2009.
Teaching experience at Monash University:
- Tutor: MAE3404 Flight vehicle dynamics, Monash University Clayton (2010)
- Tutor: ENG1060 Computing for Engineers, Monash University Clayton (2008 & 2010)
- Tutor: ENG1040 Engineering Dynamics, Monash University Clayton (2008)