Phoenix, Arizona, United States
Well-educated & organized stress engineer who likes problem solving & critical thinking. Extensive experiences with stress analysis using finite element code, ANSYS, and its verification by closed form solutions & tests for IGCC components & system, micro-turbine engines, and their packaging structures. Physics-oriented problem solver for various failure analyses with hands-on skill on interpreting FEA results from high temperature environments.
Working at Honeywell Aerospace site as a contractor
Performed clearance analyses of compressor & turbine blades for newly developed (NPI) gas turbines & upgrades of turbine units (CM&U) for service applications. • Optimized compressor & turbine blade tipping and provided steady state clearances for an NPI gas turbine (7HA.01-FL17) • Performed clearance analysis on various CM&U service applications and provided clearance & alignment diagrams for them • Led casing G-sag tests & Float tests to support clearance analysis for new product development & manufacturing cost out • Be responsible for clearance related manufacturing issues and acquired hands on experiences on unit assembly processes & how to measure clearances
Perform multiple roles simultaneously: owning a component (quench ring & quench system) while performing stress analysis for other components & system and serving as the focal point of the division to examine hardware & technology for export control • Own quench ring component of Gasification plant: provide detail designs for manufacturing & support field service team & customers for all the issues related to the component for Gasification plants using various feedstocks • Developed a thermal model on abutment with built-in cooling channel of posimetric feeder, which delivers coal particles to the high pressure gasifier. Prediction of accurate temperature is critical to avoid the ignition condition. • Led a global team for development of applying wear resistant coating by HVOF spray to the middle tip of feed injector and enhanced the erosion life more than 2x • Successfully performed extensive thermal analysis to achieve 99% reliability in cold & hot start of gasifier considering environmental conditions, variations in geometry & material properties of refractory, & soak time to support start-up of an IGCC plant • Successfully led instrumentation plan & executions to measure temperature & pressure for 10 feed injectors in different operating conditions during start-up period in an IGCC plant. • Led a global team and improved the life of a feed injector for coal gasification ~2x by optimizing cooling channel geometry
Performed FEA analyses on IGCC components such as vibration and buckling analyses of cooling water coils, stress analysis on feed injector as a contractor to GE Gasification
Participated in developing 200 Kw micro-turbine components & responsible for all the stress issues related to 30 Kw & 65 Kw micro-turbines since 2004 • Increased LCF life of a turbine nozzle ~3x by optimizing its shape considering transient thermal stress • Increased on-loading cycle life of a turbine wheel ~2x by introducing undercut spline fillet in the backface • Predicted creep life of a turbine wheel of 96 Krpm & validated it with tests • Performed fatigue analysis on a compressor & validated it with LCF & HCF tests • Provided numerous solutions to improve performance and reliabilities of engines by optimizing features such as stress, elastic & plastic deformations, modal frequency, tip clearance, imbalanced force, and interference of fits