MARK A. CORBO, P.E.
President & Chief Engineer
BACKGROUND
Mark Corbo offers more than 25 years of experience in the design and analysis of rotating equipment and hydraulic and pneumatic valves, pumps, and actuators. His qualifications include extensive experience in engineering consulting, engineering analysis, troubleshooting, and mechanical design.
EXPERTISE
As a professional engineering consultant, Mr. Corbo’s areas of specialization include:
- Lateral Rotordynamics (Critical Speeds, Unbalance Response, Stability, Multi-Level Modeling)
- Torsional Vibration (Undamped, Damped Steady-State, Transient Response)
- Fluid Flow Analysis (Hydraulics, Compressible Flow, Computational Fluid Dynamics)
- Fluid-Film Bearing Design and Analysis
- Valve Design and Analysis (Poppets, Spools, Flappers, Plates)
- Pump Design and Analysis (Centrifugal Pumps, Axial Inducers, Vane Pumps, Gear Pumps)
- Structural Analysis (Stress Analysis, Vibration, Finite Element Analysis)
- Control Systems Analysis (Dynamic Simulations, Accuracy Studies)
MAJOR PROJECTS & ACCOMPLISHMENTS
No Bull Engineering - President & Chief Engineer
- Performed multi-level lateral rotordynamic analysis and torsional vibration analysis for two vertical long-shaft wastewater pumping units for a major pump manufacturer.
- Performed time-transient startup torsional vibration analysis for four large synchronous motor-driven compressor trains located at a major petrochemical complex.
- Designed TEFP backup valve (hydraulic spool/poppet valve) for Hamilton Standard.
- Performed time-transient startup and shutdown torsional vibration. analyses for synchronous motor-driven cement mill containing planetary gearbox.
- Performed containment analysis for hydraulic dynamometer and flywheel.
- Performed design audit on gas-lubricated thrust bearing for major APU manufacturer.
- Performed lateral rotordynamic and torsional vibration analyses and helped determine cause of steam turbine blade failures at a fertilizer plant.
- Investigated and evaluated methods for determining labyrinth seal destabilizing forces for high pressure steam turbines.
- Designed two liquid-sodium lubricated bearing systems for pumps for nuclear facilities.
- Performed design audit on GE gas turbine for a major utility.
- Performed finite element analysis on Hamilton Standard SVA & Bleed Actuator Housings.
- Performed bolt and lug stress analysis and thread stress analysis for Hamilton Standard.
- Performed torsional vibration analysis on three marine propulsion systems for Detroit Diesel.
- Performed lateral rotordynamic analysis per API 610 on horizontal slurry pump for major pump manufacturer.
- Designed pneumatic anti-ice valve for Allied Signal.
- Performed tapered-land thrust bearing design audit and optimization for locomotive turbocharger manufacturer.
- Performed design audit on vertical long-shaft pump for employment at a major nuclear waste site.
- Performed torsional vibration analysis for VFD-driven mining truck propulsion unit.
Mechanical Technology Incorporated - Senior Analytical Engineer
- Generated six-level rotordynamic model and performed critical speed, unbalance response, and stability analyses for Siemens gas turbine-generator. Developed algorithm for calculating equivalent dynamic coefficients for blade rubs and incorporated them in non-linear rotordynamic analysis for predicting consequences of turbine stage blade loss.
- Performed lateral rotordynamic analyses per API 617 for two turbocompressors for major OEM.
- Performed undamped and/or damped torsional vibration analyses for multiple clients.
- Performed multi-level rotordynamic analysis of vertical motor for Reliance Electric Co.
- Redesigned fluid-film journal bearings to rectify compressor instability problem for OEM in HVAC industry.
- Performed network flow analysis to select optimum arrangement for Wankel engine bearing lube system.
Coltec Industries, Chandler Evans Division - Senior Analytical Engineer
- Variable Displacement Vane Pump - Designed pressure regulating valve, relief valve, and servo pistons.
- Allison 250 Fuel Control - Designed altitude compensation valve, auto/manual transfer solenoid valve and overspeed solenoid valve. Developed computer programs for solenoid design and prediction of stepper motor torque-speed curves. Ran dynamic simulations for overspeed solenoid energization response, valve response to G-loads, and control and engine performance.
- Hamilton Standard 367F Overspeed Governor - Designed governor pilot valve and lockout and reset solenoid valves.
- LHTEC T800 Fuel Control - Designed liquid-ring boost pump using CFD.
- Lycoming ALF-502 Fuel Control - Utilized CFD model to solve ball valve instability problem.
- Williams FJ44 Fuel Control - Analyzed T2 aspirator performance using one-dimensional compressible flow theory.
- Chandler Evans Centrifugal Pumping Systems - Generated generic design and analysis procedure for centrifugal pumping systems.
United Technologies Corp., Hamilton Standard Division -
Senior Design Engineer
- LHX Blower - Designed main rotor hardware, fiberglass diffuser housing, and Barske-type scavenge pumps. Performed lateral rotordynamic analysis and ball bearing life analysis.
- PW4000 Compressor Bleed Actuator - Designed hydraulic flapper system, pilot valve, and actuator piston. Performed steady-state accuracy study for entire control loop.
- PW5000 Fuel Control - Designed hydraulic actuator and performed all housing structural analysis (using FEA). Performed accuracy studies for both gas generator and augmentor controls.
- GTA-26 Pressure Regulating Valve - Designed hydraulic flapper system and performed accuracy study.
CREDENTIALS & AFFILIATIONS
- B.S. and M.S. in Mechanical Engineering from Rensselaer Polytechnic Institute
- Registered Professional Engineer in New York State
- Member - American Society of Mechanical Engineers
- Member - Society of Tribologists and Lubrication Engineers
- Member - The Vibration Institute
SELECTED PUBLICATIONS
- Corbo, M. A. and Malanoski, S. B., "Practical Design Against Torsional Vibration," Proceedings of the Twenty-Fifth Turbomachinery Symposium, Turbomachinery Laboratory, Texas A&M University, College Station, Texas, pp. 189-222 (1996).
- Corbo, M. A. and Malanoski, S. B., "Tuning Out Torsional Vibration," Machine Design, pp. 53-58 (February 6, 1997)
- Vitiello, S. A., Corbo, M. A., and Hall, M. N., "Design of Long Shaft Slurry Pump to Increase MTBF in Hazardous Waste Retrieval Operations," Proceedings of the Third ASME Pumping Machinery Symposium, ASME, Vancouver, B. C. (June 1997).
- Corbo, M. A. and Malanoski, S. B., "A Comprehensive Torsional Vibration Analysis Procedure, Parts I & II," Proceedings of the Sixteenth ASME Biennial Conference on Mechanical Vibration and Noise, ASME, Sacramento, CA (September 1997).
- Corbo, M. A. and Malanoski, S. B., "Pump Rotordynamics Made Simple," Proceedings of the Fifteenth International Pump Users Symposium, Turbomachinery Laboratory, Texas A&M University, College Station, TX, pp. 167-204 (1998).
- Corbo, M. A. and Malanoski, S. B., "Smoothing the Stresses of Torsional Vibration," Machine Design, pp. 88-96 (Dec. 10, 1998).
- Corbo, M. A. and Cook, C. P., "Torsional Vibration Analysis of Synchronous Motor-Driven Turbomachinery," Proceedings of the Twenty-Ninth Turbomachinery Symposium, Turbomachinery Laboratory, Texas A&M University, pp. 161-176 (2000).
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