METHOD OF DETERMINATION OF LIQUID VOLUME RATE IN PIPELINES OF HYDROELECTRIC POWER STATIONS (VERSIONS) Russian patent published in 2009 - IPC F03B17/00 G01F1/00 

FIELD: physics; measuring.

SUBSTANCE: invention concerns water-power engineering field, namely to methods of determination of rates of flux of a fluid in pipelines of major diameters of hydroelectric power stations at Reynolds numbers Re>>1x10⁶. The first method lies in determination of local quantities of velocities of a stream on radiuses of traversal section of the pipeline. Break traversal section of the pipeline into 3-8 ring segments of equal volumes at their warrants. Then spot areas of their foundation beds and calculate co-ordinate x⁰ of points of measuring concerning centre of section of the pipeline on the basis of the Nikuradze power law In points x⁰ erect hydrometric revolving objects, measure medial velocity of a stream in each segment and count the full rate of flux. According to the second method, radiate an impulse under an acute angle "α" to a direction of a motion of a stream on a chord of traversal section of the pipeline ultrasonic. Then measure time its passages to direct and return directions also spot medial velocities of a stream on a stream chord. On the basis of the Nikuradze power law gain a distribution function of medial quantities of velocities on chords and spot weight coefficients. Determine the total of weight coefficients equal unity. Measure medial velocity of a stream on corresponding chords and calculate the fluid rate of flux.

EFFECT: raising accuracy of measurings on quantity to 10%.

2 cl, 12 dwg, 14 tab