80 research outputs found
Strategic Designing and Optimization of Mixed Flow Impeller Blades for Maritime Applications
No full textA heuristic approach for cluster TSP
No full textThis investigation took an attempt to solve the cluster traveling salesman problem (CTSP) by the heuristic approach. In this problem, nodes are clustered with given a set of vertices (nodes). Given the set of vertices is divided into a prespecified number of clusters. The size of each cluster is also pre-specified. The main aim is to find the least cost Hamiltonian tour based on the given vertices. Here vertices of each cluster visited contiguously, and the clusters are visited in a specific order. Standard GA is used to find a Hamiltonian path for each cluster. The performance of the algorithm has been examined against two existing algorithms for some symmetric TSPLIB instances of various sizes. The computational results show the proposed algorithm works well among the studied metaheuristics regarding the best result and computational time.</p
Design of Blade of Mixed Flow Pump Impeller Using Mean Stream Line Method
No full textAbstractDesigning of mixed flow impeller blades is still a cumbersome task, mainly due to the great number of geometric parameters. From the day of its invention various methods have been used for designing the same. Some of the prominent methods are inverse time marching method, the pseudo-stream function method, Fourier expansion singularity method, free vortex method, mean stream line theory method etc. All of these have their own merits and demerits. In this work mean stream line theory has been used for the designing of blades. It has been observed that this method, although used sparingly, gave results comparable to the other methods
Design validation & stress analysis of mixed flow pump impeller blades under applied uniformly distributed and uniformly varying loads.
No full textAnalysis of Different Mould Section Sizes to Optimize the Submerged Entry Nozzle to Measure the Meniscus Fluctuation in a Continuous Casting Mould
No full textAn experimental investigation has been carried out to analyse different mould section sizes to measure the meniscus fluctuation by varying different liquid flow rates and different submerged entry nozzle port angles, i.e., 0° port angles, 15° downward and 15° upward port angles. The terms of maximum surface wave fluctuation and standard deviation have been analysed for the above mentioned parameters. It was observed that a submerged entry nozzle with 0° port was found to be superior when it was compared with a 15° downward and 15° upward port nozzle. By conducting an experiment, it was observed that as the water flow rate increased, the maximum wave amplitude was found to be increasing, which results in more turbulence. Different mould section sizes were analysed to provide background information to the steelmaker to analyse the behaviour of fluid flow pattern. The operating parameters of the result obtained from the present setup were compared with the published literature, and a scale down of slab moulds can be justifiedregarding the rough flow pattern in the mould but can lack accuracy. The reason behind this statement is that the integral length scales of the turbulent flow between scaled down and full scale models can be different. Therefore, details of the flow pattern can become great differences between both types of models
Design of a Mixed Flow Pump Impeller and its Validation Using FEM Analysis
No full textAbstractThe design of mixed flow pump impellers of high specific speed is a much tougher than the other types of flow impellers and it becomes more complicated while deciding the blade positioning in the meridional annulus. In this work, natural frequency and deformation of mixed flow pump impeller were evaluated considering two different blade positions in the meridional annulus. ANSYS was used for the investigation of natural frequency and deformation. It was observed that the mixed flowpump impeller with inlet inclined blade position in the meridional annulus was more suitable than the trapezoidal one
Effect and Optimization of Various Machine Process Parameters on the Surface Roughness in EDM for an EN19 Material Using Response Surface Methodology
No full textAbstractIn today's world the manufactured product not only requires high precision and quality but also the same is to be achieved in minimum time. This has given rise to a situation which requires the knowledge of optimum values of various input parameters to maximize or minimize a particular output. In the present work effort has been made to investigate the effect of various process parameters such as Pulse ON time, Pulse OFF time, Discharge Current and Voltage on the Surface Roughness for EN19 material in die sinking EDM process. EN 19 materials, due to presence of molybdenum and chromium, finds application in products experiencing high shock. By experimentation a relationship has been established between process parameters and responses in EDM using Response Surface Methodology. In this the main objective was to minimize the Surface Roughness resulting from the experimentation conducted as per L31 orthogonal array based on RSM. Experimental data obtained were statistically analyzed and the optimized sets of values of the various parameters were depicted. It was observed that with these values improvement in surface roughness were obtained. A confirmation test was carried out to check the deviation in surface roughness value of the predicted model with experimental data and it was observed that the error was within 0.02%
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