Research in thermoanemometric measuring device of pulse flow of two-phase medium
2018
Dmytriv, V., Lviv National Agrarian Univ. (Ukraine) | Dmytriv, I., Lviv National Agrarian Univ. (Ukraine) | Dmytriv, T., Lviv Polytechnic National Univ. (Ukraine)
The scheme and peculiarities of the operation of the thermoanemometric measuring device of the two-phase flow are considered on the example of milk transportation with air inclusion during the work of the milking machine. On the base of the thermal balance equation the mathematical model is developed that allows simulating the temperature of the sensor's perceptual elements and its mutual placement in the flow of the measured medium. The temperature impulse of the thermal field is measured; its intensity depends on the flow velocity and the ratio of “liquid-gas”. The influence of the environment temperature and the initial temperature of the measured medium are eliminated. The sensors are located in a measured medium and do not distort the character of its movement. The results of modelling the parameters of the thermoanemometer and the data of experimental researches are analysed. In the automated milking machine the milk yield was measured by the thermoanemometer in the process of machine milking of cows. To determine the system of flow parameters of a two-phase medium, a single-chip microcontroller has been applied.
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