Project Mechanical Engineering

Sajesh B Adulkar

A graduate student in Mechanical Engineering specializing in thermal-fluid and CFD, with

• Experience of carrying out single-phase / two-phase HX simulations and surface reaction with Ansys Fluent.

• Experience in carrying out finite element simulation with Nastran NX 7.5 and Ansys workbench.

• Knowledge of electrical effect, mechanical design and analysis, thermal management and material selection pertaining to micro-electronics packaging.

Education

Master’s of Science, Mechanical Engineering CGPA – 3.87/4.00, Arizona State University Dec 2011

Bachelor of Science, Mechanical Engineering CGPA – 3.78/4.00, Arizona State University Dec 2009

Research Project Experience

Research assistantship in gas turbine heat transfer lab at Arizona State University (Jan 2010 – Dec 2011)

As a Research Assistant in gas turbine heat transfer lab at Arizona State University, I have worked on HRSG project. To derive the solution for this project it was required to solve for flow, temperature and species distribution fields through HRSG with CFD software - Ansys Fluent and flow distribution through ammonia injection system. My work involved:

Interacting with client to gather site information, data and update project requirements.

Analyzing project requirements and breaking down the problem into three components, which were, the vaporization chamber, manifold with built-in risers and perforated ammonia injection grid, to solve flow distribution through the ammonia injection system.

Researching various sources to find alternative solutions and derive solution by testing out the results of successive components.

Carrying out calculations for “U” factor, ΔP and loss coefficient for tube banks. Porosity and surface to volume ratio for porous media.

Designing and developing software for the ammonia injection grid for the solution derived.

Carrying out simulation of HRSG for flow, temperature and species concentration distribution in the exhaust gases flowing through the HRSG duct upstream and downstream of the SCR catalyst bed with Ansys-fluent.

Solving single-phase flow & two-phase flow through tube bank using homogeneous model and Kandlikar’s correlation.

• Evaluating the performance characteristic of the overall ammonia injection system as it pertains to optimum reduction of NOX in the exhaust gases. The task involved:

Using porous media for the SCR catalyst and carrying out surface reaction for the varying concentration of NH3 upstream of SCR (Aftertreatment).

Curriculum Projects

• Solved and Analyzed compressible flow through a converging-diverging nozzle

A predictor-corrector method was used to solve the governing conservation equations for mass, momentum and energy of a compressible gas. The steady state solution was derived and influence of parameters such as grid spacing and time step was investigated.

• Solved and Analyzed Burgers equation

The MacCormack scheme was used to discretize the governing equations. The kinetic energy was calculated from the fine grid and compared to the larger grids.

• Solved Navier-Stokes (NS) equation for lid driven cavity flow

A fractional step method on a staggered grid was used to mathematically solve the problem. Within each time step, the viscous Burgers equation was solved with the FTCS scheme. The pressure was then determined using a Poisson equation. The output was compared with solution obtained using the commercial software – Ansys Fluent.

• Finite element analysis of golf cart GPS display holder

The analysis was carried out after extracting mid plane of the 3D geometry to reduce computational time.

Used contact mesh for connecting plane and R Bar for connecting perpendicular surfaces.

• Senior design project

Successfully designed, built and tested solar powered refrigerator (0-4oC) for vaccine.

Used Eco-Friendly refrigerant R134A and variable speed drive DC compressor.

Detailed testing of solar panel, battery, refrigerant cycle and insulation was carried out to ensure that they work together for their intended purpose. The entire procedure was well documented for ease of understanding.

Work experience

Senior Project Engineer, M/s. Dikshit Consultants & Engineers Pvt. Ltd., A’bad, India (Jan 2001 – Dec 2004).

• Experience of interacting with clients, technical and non-technical personnel, to gather project requirements / needs.

• Analyzed client requirements, developed detailed HVAC Report and designed high and low side system for pharmaceutical, multiplex, hospital, office and residential projects.

• Coordinated calculation of heat load and technical drawings. Executed technical / commercial scrutiny of the quotations.

• Lead a team of junior engineers and draftsmen for timely completion of projects.

• Active involvement in preparing DQ, IQ, OQ, and PQ documents for the clean room project as per US FDA requirements.

Computer Skills

• Engineering Tools -- MATLAB, ANSYS Fluent, ICEM, ANSYS Workbench, Gambit, Nastran

• Software Languages -- C++, Java (with Netbeans IDE)

• CAD Packages -- Solid Works, ProE, AutoCAD

Memberships

• President of American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), student chapter at ASU.

• Vice-President of ASHRAE student chapter at ASU for fall 2008 and spring 2009.

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