Abstract: A system includes a method and apparatus suitable for measuring planar drop sizes in a liquid spray. Measurement may involve illuminating the spray with multiple lasers and measuring the scattered intensities at several view angles using linear arrays. The system may use inverse calculation of the measured scattered intensity to estimate the local drop sizes across the entire plane in a spray. The system includes radiation detectors containing sensing elements, a lens systems, and analog to digital conversion board to convert scattered intensities to drop sizes. In addition, the system may include choppers including at least two unique filters. The filters may be selectively placed in a path between the spray and the sensing elements. By selectively placing a single array may measure both a scattered intensity and an extinction of laser light emitted from the spray.

Abstract: A system includes a method and apparatus suitable for measuring planar drop sizes in a liquid spray. Measurement may involve illuminating the spray with multiple lasers and measuring the scattered intensities at several view angles using linear arrays. The system may use inverse calculation of the measured scattered intensity to estimate the local drop sizes across the entire plane in a spray. The system includes radiation detectors containing sensing elements, a lens systems, and analog to digital conversion board to convert scattered intensities to drop sizes. In addition, the system may include choppers including at least two unique filters. The filters may be selectively placed in a path between the spray and the sensing elements. By selectively placing a single array may measure both a scattered intensity and an extinction of laser light emitted from the spray.

Abstract: A system includes a method and apparatus suitable for measuring planar drop sizes in a liquid spray. Measurement may involve illuminating the spray with multiple lasers and measuring the scattered intensities at several view angles using linear arrays. The system may use inverse calculation of the measured scattered intensity to estimate the local drop sizes across the entire plane in a spray. The system includes radiation detectors containing sensing elements, a lens systems, and analog to digital conversion board to convert scattered intensities to drop sizes. In addition, the system may include choppers including at least two unique filters. The filters may be selectively placed in a path between the spray and the sensing elements. By selectively placing a single array may measure both a scattered intensity and an extinction of laser light emitted from the spray.

Abstract: A system includes a method and apparatus suitable for measuring planar drop sizes in a liquid spray. Measurement may involve illuminating the spray with multiple lasers and measuring the scattered intensities at several view angles using linear arrays. The system may use inverse calculation of the measured scattered intensity to estimate the local drop sizes across the entire plane in a spray. The system includes radiation detectors containing sensing elements, a lens systems, and analog to digital conversion board to convert scattered intensities to drop sizes. In addition, the system may include choppers including at least two unique filters. The filters may be selectively placed in a path between the spray and the sensing elements. By selectively placing a single array may measure both a scattered intensity and an extinction of laser light emitted from the spray.

Abstract: Method for detecting variations in gas density within a volume surrounded by a closed metal wall opaque to optical light includes a source of x-rays positioned at a selected location outside the closed metal wall. Positioning a detector outside the closed metal wall at a location suitable to detect x-rays from the source passing entirely through a portion of the volume surrounded by the closed metal wall. Providing the detector with a plurality of sensors arranged in at least one row to capture a dimensionally distributed view of detected x-rays. Coupling a processor to an output of the detector to analyze the data which can be displayed in a suitable graphical or pictorial presentation, including processing the data to correct for any beam hardening of the x-rays as they pass through the closed metal wall, to apply the Maximum Likelihood Estimation method to generate on the display a reconstructed image of the gas density, and to use Inverse Radon Transforms for deconvolution.

Abstract: Method for detecting variations in gas density within a volume surrounded by a closed metal wall opaque to optical light includes a source of x-rays positioned at a selected location outside the closed metal wall. Positioning a detector outside the closed metal wall at a location suitable to detect x-rays from the source passing entirely through a portion of the volume surrounded by the closed metal wall. Providing the detector with a plurality of sensors arranged in at least one row to capture a dimensionally distributed view of detected x-rays. Coupling a processor to an output of the detector to analyze the data which can be displayed in a suitable graphical or pictorial presentation, including processing the data to correct for any beam hardening of the x-rays as they pass through the closed metal wall, to apply the Maximum Likelihood Estimation method to generate on the display a reconstructed image of the gas density, and to use Inverse Radon Transforms for deconvolution.

Abstract: An apparatus and method for measuring spray angle, spray uniformity, and spray velocity using laser sheet tomography includes measuring the extinction image formed by a spray in two laser sheets spaced apart by a know distance.

Abstract: An apparatus and method for measuring spray angle, spray uniformity, and spray velocity using laser sheet tomography includes measuring the extinction image formed by a spray in two laser sheets spaced apart by a know distance.

Abstract: The present invention relates to a combustion temperature sensor, and, more particularly, to a combustion temperature sensor that measures infrared energy emitted at several preselected wavelengths from a flame and/or a flame's hot gas at a turbine inlet location and applies the energy signals to a calculation model to yield temperature.

Abstract: The present invention relates to a combustion temperature sensor, and, more particularly, to a combustion temperature sensor that measures infrared energy emitted at several preselected wavelengths from a flame and/or a flame's hot gas at a turbine inlet location and applies the energy signals to a calculation model to yield temperature.

Abstract: An infrared spectrometer is adapted to capture spectral data at high frequency and includes an aperture defining slit and tuning fork chopper for periodically admitting infrared radiation. A lens and a plurality of mirrors direct the infrared radiation through pair of calcium fluoride prisms that split the infrared radiation into spectral components. The spectral components are directed by an additional mirror and lens to an array of lead selenide pixels that generate a set of data indicative of the spectral component intensities. Data collection circuitry coupled to the pixel array and coupled to the tuning fork chopper collects the set of data at a selectable rate at least once during each opening of the aperture. A serial output on the data collection circuitry provides a list of data values representative of the spectral intensity at each pixel which can be then stored in a mass storage device as well as immediately analyzed based on selected criteria.

Abstract: Laser sheet tomography is employed to determine flow field statistics in non-steady and steady flow at high repetition rates. The laser sheet tomography system is divided into two independent optical portions, the laser illuminator and the laser imager. As an absorption instrument, the laser illuminator can be shone directly into the laser imager, or if desired, the two portions can be positioned orthogonally to each other with the laser imager observing the scattered light. The observed light is correlated with known variations in laser intensity of the imager to generate transmittance data from which asymmetry ratios and probability density functions of local absorption coefficients can be computed at time repetition rates of 200 Hz and greater.