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Papers by uday aswalekar

Lecture notes in mechanical engineering, Nov 5, 2022

This paper explains a new design of nozzles used in aerospace applications called as an aerospike... more This paper explains a new design of nozzles used in aerospace applications called as an aerospike nozzle. We examined analytically the performance of aerospike nozzle with conventional bell shaped nozzles, currently used in all aerospace applications. The result of this study showed that the efficiency of an aerospike nozzle outweighs the efficiency of the bell nozzle at different working altitudes, making it a better option for aerospace applications.

Pressure vessels are containers used for containment of Gases, Liquids at substantially higher pr... more Pressure vessels are containers used for containment of Gases, Liquids at substantially higher pressure. This paper deals with the sizing and mechanical design of a chemical reactor used for the Digestion of Ilmenite and Sulphuric Acid. The mechanical design of the components of the Pressure vessel has been achieved using the ASME code and engineering design formula. The maximum principal stress theory has been used as the yield criteria for designing the components of the vessel. The stress variations across the length of the shell has been found using analysis in Ansys and stiffening rings of suitable dimensions have been provided to prevent buckling of the vessel. Hydrostatic pressure has been found within the allowable limit which proves that the vessel can withstand the applied pressure. The results obtained in ANSYS has been optimized by varying the element size, shape of elements and number of elements in ANSYS.

Uday V. Aswalekar Vinod B. Tungikar Abstract Micro, Small and Medium Sized Enterprises (MSMEs) pl... more Uday V. Aswalekar Vinod B. Tungikar Abstract Micro, Small and Medium Sized Enterprises (MSMEs) plays a pivotal role for Indian economy. This study was carried out for assessing ergonomics work environment and risk factors associated with the development of MSDs among the welders employed in 23 MSMEs from Maharashtra. The data was collected from 74 numbers of randomly selected welders. For the assessment of ergonomic work environment along with and standardized Nordic questionnaires for musculoskeletal symptoms; ergonomic questionnaire was used. Data was collected on five point Likert scale and analysis was done using SPSS 21. Results shows that welders have to frequently bend/twist, work above the shoulder, leave the place, manual loading/unloading, lifting load and monotonous and repetitive work for prolonged hours in static posture. There is high rate of musculoskeletal disorders (MSDs) in low back (64.9%), upper back (40.55%), shoulder (36.55%), neck and knees (32.45%) were obser...

Optimization has become a significant area of development, both in research and for practicing de... more Optimization has become a significant area of development, both in research and for practicing design engineers. In this work here for optimization of air receiver tank, of reciprocating air compressor, the sequential linear programming method is being used. The capacity of tank is considered as optimization constraint. Conventional dimension of the tank are utilized as reference for defining range. Inequality constraints such as different design stresses for different parts of tank are determined and suitable values are selected. Algorithm is prepared and conventional SLP is done in MATLAB Software with C++ interface toget optimized dimension of tank. The conventional SLP is modified by introducing fuzzy heuristics and the relevant algorithm is prepared. Fuzzy based sequential linear programming is prepared and executed in MATLAB Software using fuzzy toolbox and optimization tool box and corresponding dimension are obtained. After comparison FSLP with SLP it is observed that FSLP i...

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