Kristina M. Viro

• Redesigned several engine components to satisfy higher power requirements and a larger system/modified flow path and cooling architecture
• Redesigned power manager assembly for higher power turbogenerator
• Worked with electrical engineers to design the connector arrangement, designed a fuel manifold for the solenoids and fuel pump to consolidate the fuel system, and redesigned housing
• Performed tear out calculations and static structural simulations due to high vibrations and shock loads
• Designed an elbow fitting to attach a pyro flare igniter to the engine using standard for metal face seals
• Redesigned NGV for air impingement on the turbine blades to assist with fast start initiative
• Redesigned flanges for new mounting configuration, redesigned case and tailpipe assembly to accommodate new NGV mounting method
• Added pad to NGV for air impingement, designed custom fitting to attach to the NGV
• Designed c-seal groove for new flange and mounting configuration and worked with seal supplier to select the seal and design the groove
• design and prototyped heat sink to test air flow and pressure loss characteristics in house
• Worked with test engineers to predict the convection coefficient of the final heat sink design with thermocouples and verified experimental results with steady state and transient thermal analysis in ANSYS
• Ran thermal analysis on the effect of fin geometry, mosfet layout, and plate material on heat transfer to design thermal architecture for higher power requirements and study what changes had the biggest effect on effiiciency.
• Worked with aero engineering team to provide selection criteria to burst disc and filter suppliers and designed mating hardware according to supplier feedback
• Ran simulations requested by customer based on real operating scenarios
• Designed holder for speed sensor with thermal potting compound
• Redesigned spinner to house a larger magnet to improve field strength and hall sensor operation
• Added flux concentrator to speed sensor to improve signal strength and did magnetic field calculations to verify magnet position and selection
• Redesigned inlet for higher power system to directly mount the PCB card via standoffs in line with the magnet
• Researched tuning methods to improve speed control in PID loops in the engine control response
• Performed rotor dynamics to predict turbine and compressor modes and critical speeds/ failure mechanisms
• Performed analysis to measure effects of bearing stiffness and O-rings on vibrations
• Thermal analysis on effects of epoxy layer thickness and geometry on generator heat sink
• Designed and prototyped fuel manifold system with burst disc and filtration along with corresponding engine architecture for the configuration
• Worked with test engineers and suppliers and fabricated test rig to test burst discs, filter, and the fuel delivery system with solenoid.

● Created random walk model to predict and study factors affecting the rate of innovation based on networks found in energy transfer in food chains, social networks, and neural networks.

● Improved the efficiency of technological innovation processes by increasing connectivity between academia and industry using bio-inspired design principles and ecological network patterns.

• Designed test stand to measure exhaust pressures and temperatures of jet turbine engine
• Designed accelerometer fixture on the combuster case to enable thrust measurement
• Performed static analysis to determine the optimal test stand configuration to limit bearing stresses
• Performed static structural and modal analysis in ANSYS and verified beam deflection with hand calculations

• Company Overview: ETS – Lindgren, Cedar Park, TX
• Designed and launched data collection and sound propagation software features to test hemi-anechoic wedges for their acoustic properties in acoustic impedance tubes
• Debugged the existing acoustic impedance tube software and edited the code to ensure the program complied with ANSI standard
• Developed a windscreen insertion loss technical report about the effect of windscreen placement methods and angle of incidence on insertion loss
• ETS – Lindgren, Cedar Park, TX