Browsing by Author "Meshram, Atul N"

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    Design and analysis of heat exchanger trolley to cool the radar system of fighter jet Sukhoi-30
    (AIKTC, 2019-05) Meshram, Atul N; Shaikh, Riyaz [15ME49]; Lalchadi, Akram [15ME25]; Dudhane, Pratiksha [15ME01]; Khan, Sajiya [15ME02]
    An air cooler is used for efficient heat transfer from one particular medium to another medium. For separation of media, a solid wall is used so that they never mix, or they may be in direct contact. A cross flow heat exchangers are widely used in Aviation sciences, Automobile industries ,oil refineries and other large chemical processes. This type of heat exchanger is chosen because ofWork load efficiency, it has comparatively high values. Its unique compactness adds a reason for its selection. Because of its compactness it has attribute of mobility. The other characteristics are less strain on pocket and the most dignified attribute , operational safety. For designing of the apparatus, various parameters are taken into consideration. Temperature difference being the most important characteristic which is required for proper heat transfer. Flow rate of the fluid flowing through the pipes of the cooler is also of great significance. The heat transfer in the air cooler is also dependant on the pressure of fluid flowing through the pipes and the overall heat transfer coefficient of a liquid in application . Material of the pipes also affects the heat tranfer occuring in the pipes. This paper throws light on the view that keeping all consideration in mind the standard design procedure can be followed the values which has been calculated is being drafted into three dimensional model using suitable drafting softwares so that the model can be analysed to validate various thermal structural parameters.
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    Minimization of defects in aluminium alloy casting using GDC
    (AIKTC, 2018-05) Meshram, Atul N; Bepari, Farhan [14ME09]; Kanchwala, Mustafa [14ME17]; Kerawala, Rizwan [14ME18]
    In the present world with the increasing use of Aluminium alloy wheels in automotive industry the Aluminium foundry industry had to focus on the quality of the products. The quality of a foundry industry can be increased by minimizing the casting defects during production. Aim of the current study is to study the production line of an aluminum alloy wheel manufacturing industry and to improve the quality of production using quality control tools. This study shows the systematic approach to find the root cause of a major defects in aluminium castings using defect diagnostic approach as well as cause and effect diagram. Casting defect analysis is carried out using techniques like historical data analysis, causeeffect diagrams, design of experiments and root cause analysis. Data from X-ray inspection (Radiographic Inspection) have been collected along with the production parameter data. Using check sheets data has been collected and all the defects have been studied. Using Pareto chart major defects in the aluminium castings were noted. The major defects for the rejections during production were identified as shrinkages, inclusions, porosity/gas holes and cracks. Each defect is studied thoroughly and the possible causes for the defects are shown in Fishbone Diagrams (Cause Effect Diagrams). As the shrinkages mainly occur due to lack of feedability during the fluid flow the stalk changing frequency is noted along with the shrinkages defects and a relation is drawn between them. As hydrogen forms gas holes and porosity in the aluminium castings the amount of hydrogen present in the molten metal is studied by finding specific gravity of the samples collected. The molten metal temperature effects the amount of the hydrogen absorbed by it. .So the effect of molten metal temperature on the specific gravity of the sample collected have been shown in a graph and the optimum value for molten metal temperature was found out.