A particle sensing device is disclosed for sensing particles entrained in a gas, distribution of particle sizes including a first size range (e.g. PM2.5) and a second size range (e.g. PM10), larger than the first size range. A thermophoretic impulse is applied to the entrained particles. The device has a a first sensor, downstream of the thermophoretic impulse region. The thermophoretic impulse, the flow of gas and gravity combine to cause at least some of the particles to follow respective trajectories within the sampling volume. An interception unit is interposed between the thermophoretic impulse region and the first sensor, to intercept the respective trajectories of particles of the second size range but not respective trajectories of particles of the first size range. The first sensor is located to intercept and detect the respective trajectories of particles of the first size range.

A particle sensing device is disclosed for sensing particles entrained in a gas, distribution of particle sizes including a first size range (e.g. PM2.5) and a second size range (e.g. PM10), larger than the first size range. A thermophoretic impulse is applied to the entrained particles. The device has a a first sensor, downstream of the thermophoretic impulse region. The thermophoretic impulse, the flow of gas and gravity combine to cause at least some of the particles to follow respective trajectories within the sampling volume. An interception unit is interposed between the thermophoretic impulse region and the first sensor, to intercept the respective trajectories of particles of the second size range but not respective trajectories of particles of the first size range. The first sensor is located to intercept and detect the respective trajectories of particles of the first size range.

A method and apparatus for a turbine engine having a compressor section, combustion section, and a turbine section in an axial flow arrangement with a cooling circuit in fluid communication with at least one of the compressor section, combustion section, or turbine section. The method and apparatus further including separating particles from a cooling air that flows through the cooling circuit.

A method and apparatus for a turbine engine having a compressor section, combustion section, and a turbine section in an axial flow arrangement with a cooling circuit in fluid communication with at least one of the compressor section, combustion section, or turbine section. The method and apparatus further including separating particles from a cooling air that flows through the cooling circuit.

A particle sensing device is disclosed for sensing particles entrained in a gas. Gas having entrained particles with a distribution of particle sizes including a first size range (e.g. PM2.5) and a second size range (e.g. PM10), larger than the first size range, flows in a sampling volume. A thermophoretic impulse is applied to the entrained particles. The device has a first sensing region with a first sensor, downstream of the thermophoretic impulse region. The thermophoretic impulse, the flow of gas and gravity combine to cause at least some of the particles to follow respective trajectories within the sampling volume. The device also has an interception region, interposed between the thermophoretic impulse region and the first sensing region. An interception unit is located to intercept the respective trajectories of particles of the second size range but not respective trajectories of particles of the first size range. The first sensor element is located to intercept the respective trajectories of particles of the first size range and to detect particles of the first size range.

A particle sensing device is disclosed for sensing particles entrained in a gas. Gas having entrained particles with a distribution of particle sizes including a first size range (e.g. PM2.5) and a second size range (e.g. PM10), larger than the first size range, flows in a sampling volume. A thermophoretic impulse is applied to the entrained particles. The device has a first sensing region with a first sensor, downstream of the thermophoretic impulse region. The thermophoretic impulse, the flow of gas and gravity combine to cause at least some of the particles to follow respective trajectories within the sampling volume. The device also has an interception region, interposed between the thermophoretic impulse region and the first sensing region. An interception unit is located to intercept the respective trajectories of particles of the second size range but not respective trajectories of particles of the first size range. The first sensor element is located to intercept the respective trajectories of particles of the first size range and to detect particles of the first size range.

The invention provides a sensor device which comprises an input flow channel (10) for receiving a gas flow with entrained matter to be sensed. A thermophoretic arrangement (14a, 14b) is used to induce a thermophoretic particle movement from a first, warmer, region (16) of the input flow channel to a second, cooler, region (18) of the input flow channel (10). A sensor (24) comprises a particle sensor component at or downstream of the first region (16) of the input flow channel (10). The invention provides the benefit of pre-filtering (e.g. removal of most suspended solids/liquids) without the need for a physical filter that can become blocked.

The invention provides a sensor device which comprises an input flow channel (10) for receiving a gas flow with entrained matter to be sensed. A thermophoretic arrangement (14a, 14b) is used to induce a thermophoretic particle movement from a first, warmer, region (16) of the input flow channel to a second, cooler, region (18) of the input flow channel (10). A sensor (24) comprises a particle sensor component at or downstream of the first region (16) of the input flow channel (10). The invention provides the benefit of pre-filtering (e.g. removal of most suspended solids/liquids) without the need for a physical filter that can become blocked.

A method and apparatus for a turbine engine having a compressor section, combustion section, and a turbine section in an axial flow arrangement with a cooling circuit in fluid communication with at least one of the compressor section, combustion section, or turbine section. The method and apparatus further including separating particles from a cooling air that flows through the cooling circuit.

A method and apparatus for a turbine engine having a compressor section, combustion section, and a turbine section in an axial flow arrangement with a cooling circuit in fluid communication with at least one of the compressor section, combustion section, or turbine section. The method and apparatus further including separating particles from a cooling air that flows through the cooling circuit.