Hypersonic air-breathing engines are constrained to do supersonic combustion because of the effects such as vibrational excitation, dissociation, and high total pressure loss when performing subsonic combustion. Supersonic combustion has its challenges due to the very low residence time and limited combustor length. The use of liquid fuel is an attractive option for supersonic combustion due to its high energy density. Liquid fuel can also be used as a coolant since hypersonic air-breathing vehicles produce high thermal loads.

Defect free machining of Fibre Reinforced Polymer (FRP) Composites, crossing the challenges posed by anisotropic non-homogenous fibre-matrix system, is one of the important material processing requirements with a wide scope in industrial applications. Eccentric Sleeve Grinding (ESG) projected in this research is a unique strategy with progressive-intermittent cutting scheme for achieving minimal damage machined surfaces on FRPs.

Film cooling performance of a novel double jet configuration for gas turbine blade cooling is analysed. The proposed scheme has a primary compound angle hole along with a secondary hole compounded in the laterally opposite direction. The primary hole is provided with a trench at the coolant hole exit.

A human thermoregulatory model incorporating morphological details of Indians is established. The study investigated core and skin temperature variation during normal, hot and cold environments of western and Indian subjects as well as Indian male and female subjects. Effect of BMI, age, clothing and short-wave radiation on thermoregulation is also analysed. The most notable difference between western and Indian subjects is the delay in sweating and lower shivering rates under hot and cold environments respectively.

The main objective of the work is to examine the curvature effects of stenosis/dilatation region pertaining to left coronary artery. The hemodymamic features during the cardiac cycle is thoroughly examined. The influence of non-Newtonian effects of blood viscosity is found to be significant especially at stenosis regions. The flexible wall caused wall deformation and the associated flow and pressure wave propagation affecting WSS and pressure drop compared to the rigid wall.

The study addresses the issue of heterogeneous findings on optimized half divergence angle of micronozzles used for propulsion. The performance and flow characteristics are compared at two distinct operating conditions, i.e., when the flow is mostly subsonic and supersonic in the divergent section. Results show an optimum divergence angle and length, maximizing the performance for a specific operating condition and nozzle size. It is noted that the inconsistencies in literature is mainly due to exploratory efforts of small data sets.

High frequency link bidirectional converters are characterized by a high frequency inductor current. Superior dynamic performance and saturation prevention requires sensing of this high frequency current and high bandwidth ADCs for subsequent signal processing. Typically Hall effect based sensors, having their own reasonable footprints and volume, are directly mounted on the power bus bar. This makes the realization of a highly compact bus bar structure more difficult. A sensorless current envelope tracking based scheme has been proposed which also do not require any high bandwidth ADCs.