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Ph.D. (Engg) : Wave Propagation in Small Scale Structure Modelled With Nonlocal Continuum Theory

This thesis develops analytical and computational frameworks for studying static and dynamic behaviour in nonlocal elastic structures, focusing on wave propagation, stress localization, and guided-wave phenomena at micro- and nano-scales, where size-dependent effects fall outside classical continuum mechanics. Eringen's differential nonlocal elasticity theory and higher-order continuum formulations are used to capture these small-scale interactions. The […]

MTech(Res) : Design of an Ex-Situ Gas Sampling Layout with Various Probes and Their Performance Assessment for Accurate Emission Measurements

STC Conference Hall, Ground Floor, Department of Aerospace Engineering

Chemical kinetic mechanism development and validation require quantitative species data from canonical flames. Burner-stabilized pre -mixed flames provide a stationary post-flame region directly comparable to one-dimensional kinetic simulations. Ex-situ gas sampling delivers absolute CO and NO mole fractions from this region. The extraction step introduces two coupled biases. Reactions can continue inside the probe, and […]

Ph .D.(Engg.): Explicit Filtering LES of turbulent swirling flows and multi-regime hydrogen flames

STC Seminar Hall, Dept. of Aerospace Engineering

The need to decarbonize power generation and aviation has established hydrogen as a promising fuel for next generation gas turbine combustion systems. However, its high chemical reactivity significantly increases the propensity for autoignition and flashback under lean premixed conditions commonly used in hydrocarbon combustion systems. New combustor concepts based on direct fuel injection address these […]

Ph.D. (Engg): Aerodynamics and Stability of a Generic Tailless UAV in Ground Effect

AE Conference Room , AE 003
Virtual Event Virtual Event

Tailless UAVs are stealthy, high-subsonic configurations used for deep penetration into contested airspace. These configurations have wing with moderate leading edge sweep angle with no definite fuselage and lack both horizontal tail and vertical tail which makes the aerodynamics of these configurations very unique. The increase in autonomous UAVs in recent times have led to […]

Ph.D. (Engg):Tonal acoustic radiation from turbulent subsonic jets

STC Seminar Hall, Dept. of Aerospace Engineering

Acoustic tones in the near field of a Mach 0.9, Reynolds number 10^6 round jet are investigated using large-eddy simulations (LES) performed with the explicit filtering LES (EFLES) approach. The jet is issued into the ambient through a cylindrical nozzle. Pressure spectra at observer locations in the upstream direction reveal the presence of tones which […]

MTech(res) Parallel Particle Tracking for Turbulent Round Jets

STC Seminar Hall, Dept. of Aerospace Engineering

Particle tracking in turbulent jets is essential for an accurate Lagrangian understanding of jet flows. While parallel algorithms and numerical schemes to compute flow fields can be scaled to a large number of computing processes, the same is not necessarily true for particle tracking. This thesis presents an analysis of the parallel efficiency of particle […]

Ph.D. (Engg): Development of Learning-based Strategies for Reconnaissance with Multi-Robot Systems

STC Seminar Hall, Dept. of Aerospace Engineering
Virtual Event Virtual Event

Reconnaissance is the contest for information about a territory: one side tries to observe an asset or a guarded area, the other tries to deny it. Low-cost drones have made this contest cheap and constant, and protecting critical infrastructure against it is now a crucial problem, because an intruder no longer needs to strike a […]

Ph.D. (Engg): A Slotted Wing Configuration for STOL Applications

Online
Virtual Event Virtual Event

The rapid development of Urban Air Mobility (UAM) has led to the emergence of electric vertical take-off and landing (eVTOL) aircraft, with many current concepts relying on tilt-rotor or other complex propulsion-conversion mechanisms to achieve vertical take-off and landing followed by efficient forward flight. While these configurations provide the required operational flexibility, the mechanical complexity […]

Ph.D. (Engg): Splashing of impacting drops on rigid and flexible superhydrophobic surfaces

STC Seminar Hall, Dept. of Aerospace Engineering

Understanding droplet impact dynamics on superhydrophobic (SHP) surfaces is crucial for exploiting their exceptional liquid-repellent properties in various industrial applications. Studies on high-velocity droplet impacts on SHP surfaces, particularly under splashing conditions, are of significant importance for applications such as anti-icing and erosion protection of turbine blades. This thesis presents an experimental investigation of splashing […]

M.Tech (Res): Direct Numerical Simulation of Turbulent Aerosol Transport in Human Respiratory Flows

AE Conference Room , AE 003
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Airborne transmission of respiratory diseases is governed by the coupled dynamics of the exhaled turbulent flow and the transport of pathogen-laden aerosols and droplets. This thesis studies two representative respiratory activities, speech and cough, and quantifies the infection probability using Direct Numerical Simulations. The incompressible Boussinesq Navier-Stokes equations are solved using Megha-5 solver, including the […]

Ph.D. (Engg): Acoustic Black Holes and Architected Designs for Vibration and Wave Control in Composite and Sandwich Structures

AE Conference Room , AE 003
Virtual Event Virtual Event

Lightweight composite panels and sandwich structures are vital in aerospace and mechanical engineering due to their high stiffness-to-weight ratios. However, minimizing structural mass often compromises dynamic performance, leading to severe issues like excessive vibration, noise transmission, flutter, and uncontrolled wave propagation. This research investigates the integration of acoustic black holes (ABHs) as a passive mechanism […]

Ph.D. (Engg): Large-scale unsteadiness in high-speed double cone flows

STC Seminar Hall, Dept. of Aerospace Engineering

Shock-wave/separation-region interactions (SSRI) in high-speed flows can lead to large-scale self-sustained unsteadiness when the separation region grows to dimensions comparable to the characteristic length scales of the flow geometry. A canonical example is the high-speed double-cone flow -- over a certain range of geometric parameters this configuration exhibits a large-amplitude periodic shock-wave unsteadiness, commonly referred […]

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