ARCHIVES(Journal of Harmonized Research in Engineering)

Author: Amar Nath, S.P.Shrivas, A K Khandelwal
Keyword: Material removal rate (MRR), Surface roughness (SR), ANOVA, Taguchi Design, Grey Relation Analysis (GRA).
Page No: 01-05
Abstract: Abstract - In this research, a distinct combination of Taguchi method, Gray Relational Analysis (GRA) with an experimental investigation was conducted to determine the main machining parameters which contribute to material removal rate (MRR) and surface roughness (SR) in wire-EDM of mild steel. In WEDM operations, Proper selection of process parameters is essential to obtain good surface finish and higher MRR. In setting the machining parameters, particularly in rough cutting operation, the goal is - the maximization of MRR, minimization of SR or increasing the quality. In this experiment using the selected control parameters are discharge current, pulse on time, pulse off time and servo feed setting. The four control parameters each are three level means L27 orthogonal array based on Taguchi design is selected for this analysis. The relatively significant parameters were determined by Analysis of Variance (ANOVA). The variation of output responses with process parameters were mathematically modeled by using non-linear regression analysis. The models were checked for their adequacy.The optimal parameter setting for maximum MRR and minimum SR was obtained by Gray Relational analysis. Keywords: Material removal rate (MRR), Surface roughness (SR), ANOVA, Taguchi Design, Grey Relation Analysis (GRA). Download PDF

Author: Rupendra Kumar Sinha, Sharda Pratap Shrivas, Ashish Kumar Khandelwal
Keyword: Reinforcements, pulverized coal, fly ash, MMC, casting
Page No: 06-13
Abstract: Abstract - Consisting of two or more physically and chemically distinct phases will make composite material. The composite generally has superior characteristics than those of each of the individual c omponents. There has been an increasing interest in composites containing low density and low cost reinforcements. Usually the reinforcing component is distributed in the continuous or matrix component. Fly ash is a very fine material which is produced by burning of pulverized coal in boilers of thermal power plants. The fly ash is sent to ash ponds in the form of slurry with water since it is economical. This fly ash being finer and lighter than river sand has lower settlement rate, which can be increased by adding a suitable polymer to the ash slurry in the pond. Among various reinforced materials used, fly ash is one of the most inexpensive and low density reinforcement available in large quantities as waste product during combustion of coal in thermal power plants as well as in the brick factory and rice mill. It is therefore expected that the incorporation of fly ash particles in aluminium alloy will promote yet another use of this low-cost waste by-product and, at the same time, has the potential for conserving energy intensive aluminium and thereby, reducing the cost of aluminium products. The present investigation has been focused on the utilization of abundantly available industrial and domestic waste fly-ash in useful manner by dispersing it into aluminium to produce composites by casting method. In this work two type of casting has to be obtain by MMC and compare their mechanical properties in between them. Keywords- Reinforcements, pulverized coal, fly ash, MMC, casting Download PDF

Author: Mukesh Kumar Upadhyay, Mihir Kumar Pandey
Keyword: Casting process, TOPSIS, Alloy
Page No: 14-18
Abstract: TOPSIS has developed a methodology for the application of designed experiments, including a practitioner’s handbook. This procedure has taken the design of experiments from the exclusive world of the statistician and brought it more fully into the world of manufacturing. Experiment carried out on design of experiment characterized by different survey on the basis of Temperature, Force exerted with Type of casting process on aluminum alloy that solidify and investigation the defects of shrinkage and porosity due to gases passed in casting process. In this work defects initiation and progression have been analyzed in order to identify the factors causing these very high residual stresses that often produce shrinkage and porosity spread throughout the casting.The defects were found on every square centimeter by microscope and then take their ordinary. The best productivities were obtained on the basis of results of confirmation experiments reveal that TOPSIS method can efficientlyoptimize an optimal combination of the process parameters. Key Words:- Casting process, TOPSIS, Alloy. Download PDF

Author: Bimal Kumar Kalita and Pran Hari Talukdar,
Keyword: Bodo, LDC, K-NN, Gaussian.
Page No: 19-25
Abstract: This paper works on the techniques for automated categorization of spoken sounds based on the emotional condition of the speaker. The information employed for the study comes from a corpus of selecte d natural dialogs recorded in different emotions deployed by Speech Works. In this study, Gaussian class-conditional likelihood distribution with respect to linear discriminant classification (LDC) and K-nearest neighborhood (K-NN) schemes are used to classify utterances into basic emotion states, positive and negative. The utterance level statistics of the fundamental frequency and the energy of the speech signal are used by the classifiers. The promising first selection and forward feature selection are used for feature selection to improve classification performance. The dimensionality of the features reduced to maximize classification accuracy. Improvements achieved up to 87%. Keywords- Bodo, LDC, K-NN, Gaussian. Download PDF

Author: Hooman Fallah, Mohammad Afkhami, Ali Ahmadi, Reza Jalali
Keyword: Formation Damage, Water Injection, External cake build up, Filtration, Transition Time
Page No: 26-29
Abstract: Water injection is an integral constituent of most field development scenarios, It has been considered for enhanced oil recovery (the heavy oil). This injection may take place for secondary recovery and pressure maintenance such as sea water injection associated with most injection schemes is injectivity decline; where the rate of injection decreases over time at a given constant injection pressure gradient. The phenomenon of injectivity decline is comprised of multiple phenomena such as internal filtration, external filter cake build-up, fracture propagation, relative phase changes within the matrix rock and the associated permeability decline due to each of the described phenomena. In this thesis addresses some of the key phenomena associated with injectivity decline. Most of the transport models describing the transport and capture of contaminants in the injection fluid within the matrix porous medium. The external filter cake build-up, an erosion model was derived based on the interaction of forces acting on a retained particle on the surface of the external-filter cake for both rectilinear and radial geometries. We postulate that during some initial period, an internal filter cake is formed. We refer to the time at which no more particles invade the rock, i.e. the time at which the initial layer of external filter cake is completely formed, as the transition time. The prediction of particle capturing and particle retention by mathematical model is an essential stage during planning and design of above-mentioned industrial processes. Keywords: Formation Damage, Water Injection, External cake build up, Filtration, Transition Time Download PDF