Girish K. Jankee

Girish K. Jankee
Norwegian University of Science and Technology | NTNU · Department of Energy and Process Engineering

Doctor of Philosophy
Current research interests lie in fluid-structure interaction, flow control and reacting flows, using imaging techniques

About

11
Publications
1,270
Reads
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48
Citations
Citations since 2017
11 Research Items
48 Citations
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Introduction
Current interests lie in manipulation of wall turbulence and active flow control, reacting flows, as well as uncertainty in measurement techniques such as stereoscopic PIV.
Education
September 2016 - September 2020
University of Southampton
Field of study
  • Experimental Fluid Mechanics
September 2012 - June 2016
University of Southampton
Field of study
  • Aeronautics & Astronautics/Aerodynamics

Publications

Publications (11)
Article
Full-text available
The interaction between a flow and a flexible structure can provide fascinating insight into the vortex shedding phenomenon and any propagation and mixing characteristics, which relate to a plethora of applications such as heat transfer, snoring, musical instruments, or propulsion mechanisms. In this investigation, the influence of confinement on t...
Article
Full-text available
In this paper we demonstrate direct suppression of self-excited thermoacoustic instabilities over a range of operating conditions using targeted convective-acoustic interference. Premixed hydrogen enriched methane-air flames were confined in a cylindrical pipe resulting in self-excited instabilities that corresponded to the quarter wave mode of the...
Conference Paper
Full-text available
The influence of a cylinder installed upstream of a round jet's exit plane on the dynamics of this flow field is investigated. Acoustic excitation is used to excite the flow at a particular frequency and phase-locked, high-resolution particle image velocimetry is employed to obtain velocity data. The cylinders have a marginal effect on the mean flo...
Article
The ability to impart momentum while maintaining a zero net mass flux renders synthetic jet actuators attractive tools for a wide variety of applications. Implementation of a single synthetic jet actuator for large-scale operations is unrealistic and, as such, an array of actuators is usually desired during flow control processes. The added complex...
Thesis
Full-text available
Synthetic jet actuators operate by discharging momentary slugs of fluid, which emanate from the periodic oscillations of a diaphragm. The interaction of these trains of vortices produces an unsteady jet with the ability to impart momentum to a fluid. An understanding of the behaviour of such actuators in contrasting environments is a key facet in h...
Article
Full-text available
Pixel locking in stereoscopic particle image velocimetry (SPIV) is often overlooked, albeit the existence of studies demonstrating an influence on turbulent statistics. Such a bias error occurs when the seeding particles have an image diameter in the range of 1–2 pixels. Together with the advent of superior cameras and more powerful lasers, new ima...
Article
Full-text available
The periodic ingestion and ejection of fluid through an orifice yield vortex rings forming an unsteady jet. The ability to impart momentum with a zero net mass flux makes synthetic jet actuators coveted components in flow control applications. Previous studies underlined the influence of geometrical parameters on synthetic jet evolution. This inves...
Conference Paper
Peak locking in stereoscopic particle image velocimetry (S-PIV) is often overlooked, albeit the existence of studies demonstrating an influence on turbulent statistics. Peak locking occurs when the seeding particles have an image diameter in the range of 1-2 pixels. Defocusing the camera lens slightly can conveniently address the problem. However,...

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Projects

Project (1)
Archived project
Span morphing: symmetric and asymmetric extensions Folding wingtips: symmetric and asymmetric folding