Method and apparatus for spectroscopic measurements in the combustion zone of a gas turbine engine
First Claim
1. A method of measuring combustion properties within a combustion zone of a gas turbine engine, the combustion zone being defined between an inner and an outer casing and a turbine shaft residing within the inner casing, the method comprising:
- a) treating a portion of the inner casing to produce a higher degree of scattering of a transmitted beam;
b) transmitting the beam from a transmit optic optically coupled to a first port in the outer casing through the combustion zone off the treated portion of the inner casing;
c) receiving a portion of the beam reflected off the treated portion of the inner casing with a receiving optic optically coupled to the first port or a second port in the outer casing; and
d) measuring the intensity of the portion of the beam received by the receiving optic.
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Accused Products
Abstract
A method for measuring combustion parameters within a combustion zone of a gas turbine engine, the combustion zone being defined between an inner and outer casing. The method includes transmitting a beam from a transmit optic optically coupled to a bore in the outer casing off a portion of the inner casing and receiving a portion of the beam reflected off the inner casing with a receiving optic optically coupled to a bore in the outer casing. An apparatus for practicing the method includes a laser generating a beam and a transmitting/receiving optics pair, the transmitting/receiving optics pair being configured for operative association with a port in an outer casing of a gas turbine engine, whereby the transmitting/receiving optics are in optical communication by reflecting the beam off a portion of an inner casing.
72 Citations
17 Claims
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1. A method of measuring combustion properties within a combustion zone of a gas turbine engine, the combustion zone being defined between an inner and an outer casing and a turbine shaft residing within the inner casing, the method comprising:
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a) treating a portion of the inner casing to produce a higher degree of scattering of a transmitted beam; b) transmitting the beam from a transmit optic optically coupled to a first port in the outer casing through the combustion zone off the treated portion of the inner casing; c) receiving a portion of the beam reflected off the treated portion of the inner casing with a receiving optic optically coupled to the first port or a second port in the outer casing; and d) measuring the intensity of the portion of the beam received by the receiving optic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A gas turbine engine comprising:
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a combustion zone between an inner and outer casing with a turbine shaft residing within the inner casing; at least one port in the outer casing operatively associated with the combustion zone substantially opposite a portion of the inner casing; and a transmitting and receiving pair of optics optically coupled with the at least one port, the transmitting and receiving pair of optics being configured so that the transmitting optic transmits a beam off the portion of the inner casing and the receiving optic receives at least a portion of the beam reflected off the portion of the inner casing; and wherein the portion of the inner casing is treated to produce a higher degree of scattering of the transmitted beam. - View Dependent Claims (11)
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12. An apparatus for measuring combustion parameters of a gas turbine engine, the apparatus comprising:
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a combustion zone defined between an inner and an outer casing, a first port in the outer casing; a laser generating a beam of light; a transmitting optic optically coupled to the laser transmitting the beam; and a receiving optic, the receiving optic and the transmitting optic being configured for operative association with the first port or a second port in the outer casing of the gas turbine engine, the transmitting optic and the receiving optic being optically coupled by reflecting the beam off a portion of the inner casing; and the portion of the inner casing being treated to produce a higher degree of scattering of the transmitted beam. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification