Expert Details

Expert in Mechanics (Stress, Dynamics, Test), Modeling (FEA, CFD, Chemical), Machine Design, Controls

Expert ID: 723991 California, USA

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At Cessna, Expert designed the pressure cabin, empennage, and main spar carry through for the 441 Conquest and 650 Citation 2. His other engineering responsibilities included stress measurement (strain gauges, brittle coatings), solids modeling (NASTRAN), and FAA certification report authoring.

Power user in SolidWorks. Expert designed over $40M in custom engineered incinerators, heat exchangers, atomizers, gear boxes, and other heavy equipment for Monsanto, Degussa, Microsource, Proctor and Gamble, other Fortune 500 companies, and small to medium sized companies. His design responsibilities included FEA and CFD modeling for stress, vibration, heat transfer, gas dynamics, interial loads, and mode of failure.

Expert is factory trained in Finite Element modeling at Cosmos, ADINA, COMSOL, and Stardyne, and in Finite Difference gas modeling at FLUENT, Blue Ridge Numerics, and ADINA. He designed projects from heavy equipment through microscopic electronics. He is particularly equipped for interdisciplinarity projects including chemical, mechanical, control, thermal, fluid, and economic elements.

Expert has extensive manufacturing background in custom engineered equipment using both traditional hand drafting and CAD, as well as modern manufacturing methods where parasolids files are generated in the CAD environment (ProE, SolidWorks, Autocad), and exported to a tool pass coder that then drives the end manufacturing process, such as laser cutting, EDM, multi axis milling, 3D printing, and automated welding.

See Computer Aided Engineering, Computer Aided Manufactring, Aircraft Design Fluid Mechanics, and Machine Design.

Expert is an expert in gas and liquids design using traditional theory and computer modeling. His past projects include reactor vessels, suspended powder transport, steam mixers, and design support of aircraft, gearbox, electronics, and incinerator fluids performance. He holds MS degree in fluids from the University of Colorado.

Expert has thirty years of experience designing heavy equipment (Ingersoll-Rand, Hosokawa), aircraft structures (Cessna), incinerators (Coen), and numerous custom engineered projects (PG&E’s carbonate fuel cell incinerator). His design responsibilities extend from initial process design and numerical modeling, through machine concept, prototyping, final design, control systems, and field startup.

Expert is currently redesigning existing paper drying equipment ($5T world wide) by partnering with equipment manufacturers, receiving DOE grants, and partnering with end users. His marketing responsibilities include print media, web media, industry trade show presentations, and technical article publishing.

Expert is particularly suited to products with multiple technical disciplines: chemical, mechanical, thermal, vibration, fluid, control, and / or machine design.

SELF EXCITED VIBRATION - Analyzed a 200HP gearbox that vibrated violently and unpredictably. The root cause was modal coupling, where a shaft's bending and torsion modes were separated by only 10 Hz, allowing shaft motion to couple with gearbox power flow. ACOUSTIC ISOLATION - Isolated a yttrium crystal circuit from angstrom sized deflections during 7G shock events. Circuit treatment involved softening the acoustic wave path into the circuit. All vibration modes were invisible, but diagnosable by their frequency signature.GAS MODELING - Tripled the retention time of a reactor vessel by modeling in CFD. The untreated vessel had strong recirculation paths that occupied most of the process space. The treated vessel used swirl flows to shrink recirculation.ELASTIC DEFLECTIONS - Diagnosed the driving mechanism behind 3/2 order propellor whirl. The engine case deflected because the shear center was located far from piston forces. The motor case was an open section governed by warping torsion. COGENERATION BURNER FLAMEOUT - Diagnosed burner failure at a cogeneration facility. An improperly designed plenum allowed wall attachment of a high velocity jet, flooding and starving an over and under burner set. After diagnosis, the burner was cured with perforated plates.

Expert may consult nationally and internationally, and is also local to the following cities: San Jose, California - San Francisco, California - Sacramento, California - Oakland, California - Stockton, California - Fremont, California - Modesto, California - Salinas, California - Santa Rosa, California - Hayward, California

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Year Degree Subject Institution
Year: 1974 Degree: B.S. Subject: Mechanical Engineering Institution: University of Colorado
Year: 1975 Degree: M.S. Subject: Aerospace Engineering Institution: University of Colorado
Year: 1981 Degree: M.S. Subject: Mechanical Engineering Institution: MIT
Year: 1981 Degree: M.S. Subject: Management Institution: MIT

Work History

Years Employer Title Department Responsibilities
Years: 2001 to 2005 Employer: Department of Energy Title: Grantee Department: Golden Colorado Field Office Responsibilities: Fundamental research into pulsed flow impingement as applied to heating, cooling, and drying.
Years: 2000 to 2001 Employer: Microsource Title: Consultant Department: Santa Rosa, CA Responsibilities: Isolate yttrium oscillator from angstrom sized oscillations, thermal gradient shocks, and power system thermal rise.
Years: 1995 to 1998 Employer: Jireh Crop. Title: Chief Engineer Department: Responsibilities: Design pulse dryers for Degussa and the University of Minnesota, and design pulse drying processes for numerous clients: Hoechst, BAF, Zircoa, Zinpro, Reichold, OMG, P&G, etc.
Years: 1993 to 1995 Employer: Hosokawa Bepex Title: Project Engineer Department: Engineering Responsibilities: Design pulse dryers, powder heat exchangers, ASME code pressure vessels, powder agglomerators CFD modeling of process vessels, machine design, CAD, etc.
Years: 1990 to 1992 Employer: Coen Company Title: Project Engineer Department: Burlingame, CA Responsibilities: Model industrial burners in FLUENT, design kiln burners, register burners, warmup lances, exotic incinerators, NFPA approved piping trains, safeties, etc.
Years: 1981 to 1989 Employer: Ingersoll Rand Title: Project Engineer Department: California Pellet Mill Company Responsibilities: Design gear boxes to 600 HP, high speed shafts, exotic control systems, powder heat transfer vessels, comples carburized assemblies, tribology, self excited vibration, etc.

Government Experience

Years Agency Role Description
Years: 2001 to 2005 Agency: DOE Role: Grantee Description: Experimentally characterize pulse impingement heat transfer.

Career Accomplishments

Associations / Societies
Licenses / Certifications
P.E. - Kansas and California
Publications and Patents Summary
Expert holds 1 US patent, delivered eight industry / trade show presentations/papers, performed one DOE grant project, authored dozens of consulting reports, and wrote eight FAA certification reports.

Fields of Expertise

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