| 主权项 |
1. An apparatus for measurement of flow velocity of a multi-phase fluid mixture comprising at least a gaseous phase and a liquid phase, the apparatus comprising:
an X-ray radiation device for generating a beam of photons to irradiate the mixture spatially along a section of flow of the mixture, wherein the X-ray radiation device generates photons at a first energy level and a second energy level, wherein for the first energy level, the photon absorption coefficients for two different phases contained in the mixture are substantially equal, and wherein for the second energy level, the photon absorption coefficients for the two phases of the mixture are different, a detection device comprising a single two-dimensional array of detector elements arranged on a single plane, wherein the single two-dimensional array of detector elements is spatially configured for receiving photons that are generated at both the first and second energy levels upon emanating from the section of flow of the mixture over a two-dimensional area along the plane at different intervals of time, and for forming a two-dimensional image of a spatial distribution of the received photons for each said interval of time, and an analysis device for determining a flow velocity of each of the phases of the fluid mixture based on a temporal sequence of the images of the spatial distributions of the received photons, wherein the plane extends along a first direction parallel to a flow direction of the mixture and a second direction transverse to the flow direction. |
