Mechanical Engineering

Belt conveyor system is the transportation of material from one location to another location. Belt conveyor has high load carrying capacity (upto 30000 t/h), large length of conveying path (upto 3-4 km), simple design, easy maintenance and high reliability of operation. Belt conveyor system is also used various industries such as the material transport in foundry shop like supply and distribution of moulding sand, moulds and removal of waste, coal and mining industry, sugar industry, agricultural industry, bagasse industry, fuel industry etc. . In this paper the study is carried out on DISA pattern moulding machine to meet the requirement of higher weight castings. From the DISA specification the belt conveyor system is designed by using different standards like CEMA (Conveyor Equipment Manufacture’s Association) standards, some handbooks of belt conveyor system etc. then this parameter are verified by using Belt Comp software. The result got from the Belt Comp software is in close agreement of theoretical results. After the design the manufacturing is done and the installation is done on the manufacturer’s site. The trials are carried out on the belt conveyor system successfully and the problems occurs during the trials are overcome in the analysis by taking proper steps. The present discussion aims to Trial and Analysis on belt conveyor system.

The objective of this paper is to predict the failure load of the composite laminates during tensile loading using an online Acoustic Emission (AE) monitoring and Artificial Neural Network. Bidirectional glass/epoxy laminates were subjected to tensile loading. The laminates were made for 12 layers of bi-directional glass mat in an epoxy matrix. The AE data recorded during the tensile testing was used to predict the failure load. The parameters such as amplitude, count, duration, energy, peak to count and rise-time were used for the analysis. Feed forward back propagation neural network model was generated from acoustic emission cumulative counts data taken during loading of bi-directional glass/epoxy tensile specimens. Cumulative counts recorded up to 50% and 75% of the failure load were used as the input data for simulation. The results show that the developed non-destructive method is capable of predicting the failure of composites subjected to tensile loading with an error of 3.5% and 7.6% for cumulative counts of 50% and 75% of loads respectively.

The aim of this paper is to design and analyse a biconvex aerofoil with slightly curved leading edge and estimating the coefficient of pressure (CP), coefficient of lift (CL) and coefficient of drag (CD) at supersonic and hypersonic speeds. The aerofoil is symmetric and has a thickness of 6%. Gambit and Ansys Fluent are two best CFD software used for the analysis. The aerofoil was designed and meshed using Gambit software. Good quality boundary layer mesh can be easily generated using Gambit. The mesh generated was analyzed using Ansys Fluent software. About 1000 iterations were used for the simulation purpose. The pressure coefficient, lift coefficient and drag coefficient for the designed aerofoil were obtained. It was proven that the biconvex aerofoil can also be used for hypersonic speeds.

The objective of the present study is to give a review on heat transfer characteristics of fluids in curved and straight tubes for various parameters and under different experimental conditions. The heat transfer can be increased by two techniques mainly like application of external forces or by modification in surface geometry of the fluid passages. Surface geometry modifications like bending of straight tubes into curved coils are effective and efficient method of heat transfer enhancement. In this paper, various correlations proposed based on experimental heat transfer data by earlier investigators are presented to support the enhancement in overall heat transfer coefficient in curved tube and in straight tube heat exchangers. However, comparison of experimental overall heat transfer coefficient in helical coil and straight tube heat exchangers are found to be limited in the present literature.

This is innovative idea to produce electricity. Now a day’s world mostly depends up on the electricity, why means all industry machinery are run by source of electricity. In summer time don’t get the wind and water energy properly. So this time electricity demand are occur .so this kind of problem 50% satisfied the project. This system produces two outputs give one input. The system consists two circuits are primary and secondary circuits. To give input energy to the primary circuits and produced mechanical energy. This Mechanical Energy applied to the secondary circuit. The secondary circuits produce the two output energy. The two output energy is work and electrical energy. Finally DC generator produce 2kw and also work are done. This project using small scale industry means get many profits.

Solar energy is an economical alternative for today’s energy demand in comparison with other energies. Solar air heater is used for heating the air which in turn is used for drying the agricultural products. The objective of this paper is to design, develop and perform a detailed experiment and analyze the solar assisted drying system (SADS) for drying tealeaves. Green tealeaves plucked directly from the plantations are soaked in warm water for few minutes. Water is drained out; wet leaves are dried using the SADS consists of drying chamber maintained at a temperature of 55°C and pressure of 3Kg/cm2 through solar collectors. The initial weight of the green tea leaves is of 100 gms, which is reduced to 38gms in an hour.

A CFD analysis was done to numerically study the heat transfer characteristics of an oil cooler under laminar flow conditions with varying Reynolds number from 250 to 2400 with ISOVG46 Turbinol on tube side and water on shell side for different flow rates. Simulated results of Nusselt number and friction factor are in good agreement with the available experimental results and with the Sieder and Tate equation for plain tube. Results show that the strip inserts led to a higher heat transfer rates over the plain tube with increase in Nusselt number, friction factor and over all enhancement ratios.

In this study, the producing of conical parts through backward extrusion has been numerically investigated. The finite element method has been used in order to extract the deformation behavior of 7075 aluminum alloy under this process for manufacturing of conical parts. The effect of friction on the process load has been investigated. The strain distribution has been studied and it was observed that in this process, the amount of plastic strain applied to the deforming part has reached above 2, which indicates that in this process, suitable mechanical properties can be expected from the manufactured part.

In the present work, cost of the weld is minimized by considering the qualities of weld (strength parameters). Welded joints are prepared with Mild Steel plates and M.S electrodes. Strength properties of welded joints like tensile stress, shear stress are found by conducting experiments with Universal Testing Machine (UTM). An objective function is formulated for minimization cost in terms of geometric properties of weld, where as constraints are formulated in terms of strength properties. The optimization procedure involves the selection of the major geometric parameters such as length of weld, height of weld, depth of weld, width of weld and minimization of cost is considered as the design target. In the present work Mat Lab programs of SA and PSO are developed and executed using weld and test data and the results are compared.

The rapidly depleting fossil fuels have simulated the worldwide search for the renewable alternative fuels. Our country is an agriculture based one and the production of sugar cane is more. In the production of sugar from sugar cane, alcohol will be produced as a byproduct. This made alcohol as a perfect replacement because these are derived from indigenous sources and are renewable. But with the low cetane number and high self ignition temperatures, the burning of alcohols in the existing diesel engines is difficult because for the vaporization it absorbs more heat from the engine and makes the engine cool and further more ignition delays. This made the ignition of alcohol in the high temperature combustion chambers. So in our work an insulated diesel engine is developed which retains higher temperatures in the combustion chambers and aids for the combustion. This reduces the ignition delays and leads for the complete combustion and further improves the thermal efficiency and reduces the emissions. The complete experimentation has done on a single cylinder 4-stroke water cooled 3.68 KW Kirloskar diesel engine with alcohol as a fuel. Due to lower viscosity of alcohol the fuel injection pressure is reduced to165 bar for the experimentation. In the experimentation it is observed that maximum heat lost through the piston. So three different piston crowns made up of Nimonic alloy, Copper and Brass are tried on the test engine with an objective to find the best one in terms of performance and emissions with alcohol as fuel and the same is compared with aluminum piston. Among all the pistons the brass piston performed well. Further the efficiency of the engine can be improved by providing turbulence in the combustion chamber. So for the experimentation maximum number of nine grooves is made on the brass piston and is tested. For the comparison the engine is also operated with aluminum piston. Out of all these pistons tested, brass Piston with nine grooves is found to be the best in terms of efficiency and emissions.