Publications

• "Helmet - finite element modelling of drop test" submitted for "The 2000 (IRCOBI) International research council on the biomechanics of impact conference. To be held on sept 20-22, 2000 in Montpellier, France

Abstract

Impact testing and analysis of helmet can provide information about the accelerations being experienced by the head during impact. The present study investigates important design parameters and how changes in these will affect the acceleration and resulting head injuries.

• "Modelling of head impact on laminated glass windscreens" submitted for "The 2000 (IRCOBI) International research council on the biomechanics of impact conference. To be held on sept 20-22, 2000 in Montpellier, France

Abstract

The windscreen of a car is impacted by pedestrian and riders of a two-wheeled vehicles in a large proportion of road traffic crashes. Acceleration history and the forces experienced by the impactor (head, with or without a helmet) are of significance in rider and pedestrian safety prediction. Focus of this work is on building a FEM model that models the head windscreen impact from outside the car

Papers published:

• "Technologies for Biomass based Power Generation for Developing Countries like India" accepted for presentation and inclusion in the proceedings of the "National Solar Energy Convention 1998 of Solar Energy Society of India, University of Roorkee, India .

Power generation is the route to modernization and today most of the power is coming from the fossil fuels. The development based on this is neither sustainable nor eco-friendly. For developing countries whose economy is based on agriculture and were most of the population lives in the rural area, biomass based power generation is an attractive option. Few of the technologies that has been used for power generation are Steam-Rankine cycle and Gasifier based Diesel Generator (Otto Cycle). The upcoming technologies like Gas Turbine and Stirling Engines hold good bet for biomass based power generation. The thermodynamic efficiency of the gas turbine (Brayton - Joule Cycle) is improving continuously with the development in material technology. Stirling engine (Stirling Cycle) can give us thermodynamic efficiency same as that of a carnot cycle if constant volume regenerators are developed. Today with the developments taking place in the aeroderivative gas turbine technology, integrating gasifiers with aeroderivative gas turbine in particular, it is possible to achieve high efficiencies for power generation.

• "An Experimental Study of Vortex Breakdown on a Delta Wing" presented in the proceedings of "23^rd national conference on fluid Mechanics and fluid power at MACT Bhopal, India 1996.

An experimental investigation of vortex breakdown on a delta wing with 70 degree sweep angle is presented. Smoke visualization and surface static pressure measurements are made to study the phenomena of vortex breakdown. Visualization study showed bubble type, asymmetric vortex breakdown occuring on the model at angles beyond alpha=27 degree. The location of vortex breakdown occuring moved upstream with increased angle of incidence. Moreover the breakdown location was very sensitive to upstream disturbances and to yaw angle. Detailed surface pressure measurements suggest that the vortical flow in the present study is almost independent of Reynolds number. The strength of the vortices increased with the angle of incidence and decreased towards the trailing edge for angles of incidence below the crirical angle at which breakdown occured.