Browse Prior Art Database

Materials characterization and structural design of ceramic micro turbomachinery

IP.com Disclosure Number: IPCOM000128091D
Original Publication Date: 1998-Dec-31
Included in the Prior Art Database: 2005-Sep-14
Document File: 11 page(s) / 35K

Publishing Venue

Software Patent Institute

Related People

Chen, Kuo-Shen: AUTHOR [+3]

Related Documents

http://theses.mit.edu:80/Dienst/UI/2.0/Describe/0018.mit.theses/1998-218: URL

Abstract

Since 1995, MIT has been developing the technology for micro-gas turbine-generators capable of producing 50 'IN of electrical power in a package less than one cubic centimeter in volume. The initial goal of this project is to produce a turbine generator and an all-silicon cooled engine by micromachining single crystal silicon. The goal of this thesis is to explore the structural design issues associated with the micro silicon turbogenerator and the all-silicon cooled engine with the aim of establishing a methodology for the design and fabrication of highly stressed microfabricated structures. The major research contributions includes the effect of length scale on materials and structural response, material characterization, structural analysis and failure probability, and heat transfer analysis.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 11% of the total text.

Page 1 of 11

 This record is the front matter from a document that appears on a server at MIT and is used through permission from MIT. See http://theses.mit.edu:80/Dienst/UI/2.0/Describe/0018.mit.theses/1998-218 for copyright details and for the full document in image form.

MATERIALS CHARACTERIZATION AND STRUCTURAL DESIGN OF CERAMIC MICRO TURBOMACHINERY

by

Kuo-Shen Chen
B.S., Power Mechanical Engineering, National Tsing-Hua University, Taiwan, (1989) S.M., Mechanical Engineering, Massachusetts Institute of Technology, (1995)

Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology
February, 1999
SIGNATURE OF author: [[signature omitted]]

Department of Mechanical Engineering

October 10, 1998

CERTIFIED BY: [[SIGNATURE OMITTED]]

Prof. S. Mark Spearing

Esther and Harold E. Edgerton Assistant Professor of Aeronautics and Astronautics Thesis Supervisor
Prof. John G. Brisson

Gail and Roger McCarthy Assistant Professor of Mechanical Engineering Committee Chairman Prof. Alan H. Epstein
R. C. MacLaurin Professor of Aeronautics and Astronautics

Prof. Martin A. Schmidt
Professor of Electrical Engineering and Computer Science ACCEPTED BY: [[SIGNATURE OMITTED]]

Prof. Ain A. Sonin Chairman, Department Committee on Graduate Students ARCHIVES MASSACHUSETTS INSTITUTE OF TECHNOLOGY LIBRARIES JUL 12 1999

Massachusetts Institute of Technology Page 1 Dec 31, 1998

Page 2 of 11

Materials characterization and structural design of ceramic micro turbomachinery

Material Characterization and Structural Design of Ceramic Micro Turbomachinery

by

Kuo-Shen Chen

Submitted to the Department of Mechanical Engineering on October 30,1998, in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy

Abstract

Since 1995, MIT has been developing the technology for micro-gas turbine-generators capable of producing 50 'IN of electrical power in a package less than one cubic centimeter in volume. The initial goal of this project is to produce a turbine generator and an all-silicon cooled engine by micromachining single crystal silicon. The goal of this thesis is to explore the structural design issues associated with the micro silicon turbogenerator and the all-silicon cooled engine with the aim of establishing a methodology for the design and fabrication of highly stressed microfabricated structures. The major research contributions includes the effect of length scale on materials and structural response, material characterization, structural analysis and failure probability, and heat transfer analysis.

Due to the differences in length scales between the microengine and conventional macroscale turbomachinery, a detailed investigation of the effect of length scale has been conducted. This shows that a direct comparison of a microengine structural design with that embodied in microscale engines is largely irrelevant, especially with regard to the material fracture strength. Strength test...