In many transmissions mechanism and drives the couplings play a crucial role of providing the vibration free, safe transmission of power from input to output shaft of equipment. Although the conventional rigid couplings when properly designed, selected and maintained, can provide good service life. Gear couplings are standard, however in some cases customized couplings are needed which are not possible to produce because of very high molding costs. Project aims at design, modeling, analysis and comparison testing of the gear coupling that is 3-d printed. The modeling of the compact drive system has been done using Unigraphix Nx-8 whereas the analysis is done using Ansys Workbench-16.0.

Noise has become one of the world's four major pollutant categories. Textiles have been employed as noise reduction materials in construction, automotive, and other industries because of their porous, light, and easy processing features, however there have been few investigations on woven fabrics' sound absorption properties. The effect of structural elements of woven fabrics on acoustic absorption was investigated in this research. Fabrics with plain, twill, and honeycomb weaves were woven with identical warp density and used as acoustic measuring samples, which were measured using an acoustical detecting platform based on an impedance tube. The experiment is carried out on a perforated panel to see how changes in thickness, porosity ratio, and cavity depth affect the sound absorption coefficient.The analysis is carried out using the MATLAB software. Although pore parameters have an impact on the acoustic properties of woven fabrics, the influence of pore features on textile acoustic absorption cannot be attributed solely to porosity. Sound absorption performance of woven fabrics may also be influenced by the number and shape of pores.

The present work gives information about development in field of non-premixed combustion focusing on various models developed for non-premixed combustion. Key aspects of non-premixed combustion such as ignition, extinction and lift-off are first analysed and then summarised. The review also outlines the various CFD modelling approaches that have been carried out for validating the result that has been experimentally found out. This study will help in understanding the modelling of non-premixed combustion.