Diagnostic apparatus and method for gas turbine engines
AssigneeRolls-Royce (1971) Limited
InventorPeter Antony Eabry Stewart
Life of this patent
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Abstract
The passage of foreign objects such as bullets or stones through a gas turbine engine compressor is observed by directing beams of x-radiation through the engine, receiving the beams on fluorescent screens, to form fluorescent images, intensifying the fluorescent images by respective image intensifiers and recording the intensified images with respective high speed cine cameras.
Claims11
A method of observing the passage of foreign objects through an operating gas turbine engine comprising the steps of:
- (a) energizing a means to produce beams of electromagnetic radiation in the energy range 150KV to 12 Mev each beam being of power greater than 50 rads per minute at a meter, said means having a substantially constant average output,
- (b) directing the beams along chordal lines of the gas turbine engine thereby to traverse substantially a whole crosssection of the engine,
- (c) receiving the exiting beams from the engine on respective fluorescent screens to form a fluorescent image thereon,
- (d) intensifying the fluorescent imges,
- (e) recording said intensified fluorescent images at speeds in excess of 2,500 frames per second by respective high speed recording means, and
- (f) applying a common time signature to each of the high speed recording means for the recording of time signatures along with the recording of each of the intensified fluorescent images to enable a determination of the sequence of events within the gas turbine engine.
Diagnostic apparatus for observing the passage of foreign objects through an operating gas turbine engine comprising means for producing beams of electromagnetic radiation in the energy range 150 KV to 12 MeV, each beam being of power greater than 50 rads per minute at a meter and emitted at a substantially constant output, means for directing the beams along chordal lines of said gas turbine or traversing substantially a whole cross-section of the engine, respective fluorescent screens for receiving the exiting beams from the engine for forming a plurality of fluorescent images, means for intensifying each of said fluorescent images, respective high speed recording means for recording each of said intensified images at framing speeds in excess of 2,500 frames per second, and means for applying a common time signature to each of the high speed recording means to provide a recording of time signatures along with a recording of each of the intensified fluorescent images.
Dependencies are inferred from the claim text.