Method for characterizing flame and spray structures in windowless chambers

摘要

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. A dopant can be added to enhance the interaction with the x-rays.

主权项

1. A method comprising:
positioning a plurality of sources of x-rays at a selected location outside a closed, windowless, metal wall surrounding a flow of gas, liquid, or solid particles, positioning a plurality of detectors outside the closed metal wall at respective locations suitable to detect x-rays passing entirely through the closed metal wall and a portion of a volume surrounded by the closed metal wall, each of the detectors having a plurality of sensors arranged in at least one row, capturing a plurality of respective view angles from the respective detectors to represent a dimensionally distributed view of gas, liquid, or particle density, outputting data from the detectors reflecting the distributed view, coupling a processor to the output of the detectors to analyze the data, detecting, with the processor, variations in gas, liquid or particle density within the volume surrounded by the closed metal wall based on deconvolution of the data by the processor; and providing a display to show results of the processor analysis.