Carbon-carbon composite turbine disk for the air turbo ramjet engine (ATREX)

Ken Goto, Hiroshi Hatta, Yasuo Kogo, Hiroshi Fukuda, Tetsuya Sato, Nobuhiro Tanatsugu

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A feasibility study of three-dimensionally fiber-reinforced carbon-carbon composites (3D-C/Cs) for application to a turbine disk of ATREX (Air turbo ramjet engine with expander cycle) was carried out. Spin burst tests at room temperature were conducted using 3D-C/C disks, and the fracture behaviors were characterized. A 3D-C/C disk was totally fractured at a peripheral speed of 516 m/s (r = 150 mm), which is sufficient for the ATREX application. However, fiber bundles at the disk periphery prematurely suffered micro-scale damage, and fragments of the fiber bundle unit flew out before total fracture occurred. In order to prevent the fly-out behavior, the disk was impregnated with Si only near its periphery. Although this treatment increased the initiation speed of the fly-out behavior, this improvement was considered insufficient for purposes of the ATREX application. Next, a simplified analysis was conducted to characterize the fly-out behavior. Based on this analysis, the following three measures were discussed: (1) decreasing bundle thickness (i.e. using fine fiber texture), (2) increasing toughness of the fiber bundle interface, and (3) minimizing local curvature in waviness of the fiber bundles in the circumferential direction.

Original languageEnglish
Pages (from-to)205-222
Number of pages18
JournalAdvanced Composite Materials: The Official Journal of the Japan Society of Composite Materials
Volume12
Issue number2-3
DOIs
Publication statusPublished - 2003 Dec 1
Externally publishedYes

Keywords

  • Air turbo ramjet
  • Carbon/carbon composite
  • Spin burst
  • Turbine disk

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering

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