Engine-mounted instrumentation assembly
AssigneeRolls-Royce North American Technologies Inc.
InventorMark O'Leary
Life of this patent
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Abstract
An instrumentation assembly configured to measure properties of an engine exhaust stream is disclosed in this paper. The instrumentation assembly may include an outer support ring that extends around a central axis, an inner support ring arranged radially inward of the outer support ring around the central axis, and a plurality of instrumentation rake assemblies. The plurality of instrumentation rake assemblies extends from the outer support ring to the inner support ring across an annular passageway defined between the outer support ring and the inner support ring configured to carry the engine exhaust stream.
Claims20
A propulsion system test stand configured to measure properties of an engine exhaust stream, the propulsion system test stand comprising
- a gas turbine engine configured to discharge exhaust gas in an aft direction along a central axis of engine rotation,
- an exhaust duct arranged radially outward of the central axis of engine rotation and configured to conduct the exhaust gas as it moves in the aft direction along the central axis of engine rotation, and
- an engine-mounted instrumentation assembly including an outer support ring coupled to the exhaust duct, an inner support ring positioned radially inward of the outer support ring and coupled to the gas turbine engine, and a plurality of instrumentation rake assemblies that extend from the outer support ring to the inner support ring so as to be coupled at both the outer support ring and the inner support ring allowing for a field measurement across locations from the outer support ring to the inner support ring,
- wherein each of the plurality of instrumentation rake assemblies includes a sensor arm, at least one sensor coupled to the sensor arm configured to detect properties of the exhaust gas, and mount means for coupling the sensor arm to both the outer support ring and the inner support ring to accommodate movement of the inner support ring, in the aft direction along the central axis of engine rotation, relative to the outer support ring, the movement of the inner support ring caused by thermal expansion of the gas turbine engine along the central axis of engine rotation greater than that of the exhaust duct during operation of the propulsion system test stand.
An instrumentation assembly configured to measure properties of an engine exhaust stream, the instrumentation assembly comprising
- an outer support ring that extends around a central axis,
- an inner support ring arranged radially inward of the outer support ring around the central axis,
- a plurality of instrumentation rake assemblies that extend from the outer support ring to the inner support ring across an annular passageway defined between the outer support ring and the inner support ring configured to carry the engine exhaust stream,
- wherein each of the plurality of instrumentation rake assemblies includes a sensor arm, at least one sensor coupled to the sensor arm, an outer pivot connection that supports the sensor arm to pivot about an outer pivot axis tangent to an outer diameter around the central axis and an inner pivot connection that supports the sensor arm to pivot about an inner pivot axis tangent to an inner diameter around the central axis, the inner diameter being arranged radially inward of the outer diameter.
An instrumentation assembly configured to measure properties of an engine exhaust stream, the instrumentation assembly comprising
- an outer support ring that extends around a central axis,
- an inner support ring arranged radially inward of the outer support ring around the central axis,
- a plurality of instrumentation rake assemblies that extend from the outer support ring to the inner support ring across an annular passageway defined between the outer support ring and the inner support ring configured to carry the engine exhaust stream,
- wherein each of the plurality of instrumentation rake assemblies includes a sensor arm, at least one sensor coupled to the sensor arm, a first slide connection coupled to the sensor arm via a first pivot connection that supports the sensor arm to pivot about a first pivot axis tangent to a first diameter around the central axis, and the first slide connection supports the first pivot connection for movement in a radial direction relative to the central axis.
Dependencies are inferred from the claim text.