Woodruff School of Mechanical Engineering

Faculty Candidate Seminar

Title:

Development of the piston noise analysis capability

Speaker:

Dr. Fanghui Shi

Affiliation:

General Motors Powertrain

When:

Thursday, May 2, 2013 at 11:00:00 AM

Where:

MRDC Building, Room 4211

Host:

Jeff Streator
jeffrey.streator@me.gatech.edu
404.894.2742

Abstract

CAFE regulation and customer demand for better fuel economy require the automotive OEM to use different technologies in their new engine developments. Piston is a key mechanical element in internal combustion engines. Its bowl design affects combustion flame propagation; its ring pack design affects oil consumption, blow-by and friction; its profile design affect engine NVH, its clearance affects piston scuffing, and friction. Many of these design targets are contradicting to each other and require a careful compromise and balance. This talk will be organized to follow the process of how a CAE method is developed in an engineering firm, with a given engineering problem, how to understand the physical mechanism, how to include various governing equations, and how to numerically solve this problem. The method is validated with numerous engine testing and adopted in engine development procedures.


Biography

Mr. Fanghui Shi received his B.Sc and M.Sc. from Xi'an Jiaotong University, M.Sc from FIU and Ph.D. from Georgia Institute of Technology in 1999, all specialized in Tribology. After graduated from Georgia Tech, Dr. Shi joined General Motors Powertrain (engine and transmission) Division CAE methods department. His primary responsibility of his early career at GM is to take ownership of the GM in-house developed software package, FLARE (Friction and Lubrication Analysis of Reciprocating Engines). In this responsibility, he technically supported more than 30 engineers globally who uses the software to design, analyze engine and transmission lubricated components (various bearings, bushings, pistons, pumps, gears, lubrication systems) and to solve field or warranty issues. He also meets the challenge to develop new CAE capabilities for tribology related issues in emerging technologies for example in hybrid and downsized boosted engines. Dr. Shi leads technical specialists in different areas and developed several crucial CAE capabilities and impacted GM engine design and reduced hardware cost. Dr. Shi moved up in the rank of GM engineering staff, promoted from senior engineer, to staff engineer/tribologist, senior staff engineer/tribologist, and group supervisor. He expanded his scope, and grow the expertise into various engine, transmission areas including sealing and fastening, dynamics and NVH, engine head block structure, combustion and heat transfer, transmission gear designs...He is now a technical leader in tribology, thermo-fluid CAE area at GM powertrain. He also served as reviewers for technical papers in the area of tribology and automotive engineering.

Notes

Refreshments will be served.