Search Results

Automobiles are one of the most significant discoveries of humankind and meant to transport goods and passengers from one place to other. The capability of the vehicle was mainly function of good powertrain and reliability. Above factors along with usability made automobiles successful in the earlier generations. Success of modern-day vehicles not just depend upon good power train or fine aesthetics, but on good levels of NVH (Noise Vibration and Harshness). The advent of electric vehicles has led to a quieter powertrain owing to lesser moving parts in the electric powertrain. Hence, the exterior tire noise becomes prominent. Consequently, the accurate measurement of tire noise is imperative to maintaining optimum noise level of the vehicle. The presented work focuses on the simulation of the measurement of external tire noise using Finite Element Analysis (FEA) approach.

Biodiesel is an alternate fuel for diesel consisting of the alkyl monoester of fatty acids derived from vegetable oils. The most usual method to transform oil into biodiesel is transesterification which can be carried out using different catalyst. Jatropha is second generation oil which is non edible and can be use for producing biodiesel. The first part is to expel oil from jatropha seeds. There are different types of expelling methods such as mechanical extraction, solvent extraction and enzymatic extraction. The study was conducted with hand driven mechanical expeller which is most conventional way of extracting oil from seeds with mechanical efficiency of 60-80% for single pass. The study includes various combinations of parameters like seed treatment, sun drying, pre-heating, soaking at different temperatures and different de-hulling compositions.