METHOD OF DETERMINING FLOW RATE OF COMPONENTS OF TWO-PHASE STREAMS AND SYSTEM OF IMPLEMENTING METHOD Russian patent published in 2008 - IPC G01F1/74 G01F1/66 

FIELD: physics.

SUBSTANCE: using a first electroacoustical transducer, in the wall of a vertical measuring section of conduit, a train of bending waves (antisymmetrical Lamb wave) is formed, the parameter of which is chosen such that, its energy is reemitted in the stream in form of ultrasonic waves. Using this transducer and a second electroacoustical transducer, a signal is received, scattered due to the non-uniformity of the stream and passing through it respectively. The current Doppler frequency shift of the scattered signal is calculated. From the shape of the Doppler frequency shift histogram, the flow mode is determined and if there is a "bubble" mode, the Doppler frequency shift is used for calculating the flow rate of the liquid phase from the given formula. The fraction of gas and water is determined from the characteristics of the signal, received by the second transducer. If there is a "slug" mode of flow of gas and liquid, the speed of gas bubbles is calculated using a correlation method. Water content in the liquid phase is determined from the characteristics of the signal through liquid partitions. Superimposed transducers, which are a set of piezoelectric elements, in form of multi-component phased arrays, are used for transmitting and receiving. Electroacoustic transducers and temperature and pressure sensors of the medium in the measuring section are connected to the microprocessor of the electronic unit through differential amplifiers.

EFFECT: increased accuracy of determining flow rate of components of a stream in a wide range of modes and the ratio of flow of the gas and liquid phases.

4 cl, 5 dwg