COMPUTER PROGRAM FOR AUTOMATIC DESIGN OF THE DIAMETRICAL ULTRASONIC FLOWMETERS

Анотація

Paper highlights another stage of global scientific-practical objective of the authors – development of computer system of automatic design of ultrasonic flowmeters of all available types. For the base of  the current stage authors used previously developed computer program for automatic design of multi-channel chord ultrasonic flowmeters Auto Design USM, to which two new functional possibilities are added –calculation of hydrodynamic error of the diametrical single channel single beam ultrasonic flowmeters and calculation of the correction factor on the profile of the flow, which must eliminate this error of flow measuring. To reveal the essence of the added functional possibilities the authors in the given paper theoretically substantiate the emerging of the hydrodynamic error in the diametrical single channel single beam ultrasonic flowmeters
(it may achieve more than 30 % for laminar and 8 % for turbulent modes  of measured flow motion) and available methods of obtaining the correction factor on the profile of the flow ( known empirically obtained analytical dependences  or using certain theoretical profile of the flow rate and its numerical integration). As a result of the research carried out the authors of the paper improved the computer program Auto Design USM, this enables the user to apply it in console form for automatic design of the diametrical single channel single beam ultrasonic flowmeters. At the input such program requests the user the value of Reynolds number (indicates the rate of the flow), at the output it allows to obtain the value of Nikuradze number, correction factor on the profile of the flow by four empirical analytical dependences and value of the hydrodynamic error of the diametral ultrasonic flowmeter. The paper formulates the conclusions where further stages of the work on the given subject for achieving the global scientific-practical objective, aimed at the development of the system of automatic design of ultrasonic flowmeters are outlined.