E3S Web Conf.
Volume 109, 2019International Conference Essays of Mining Science and Practice
|Number of page(s)||10|
|Published online||09 July 2019|
Ground parameters of working standard of reproduction of small speeds of air stream
Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, 49005, Dnipro, Simferopolska Str., 2a, Ukraine
2 DTEK, 01032, Kyiv, Lva Tolstoho Str., 57, Ukraine
* Corresponding author: firstname.lastname@example.org
As a working standard for research in the area the lowest air velocity can be used a rotary stand. In Ukraine it was not standard measuring instruments of low speeds of air flow. Used Ukrmetrteststandart the Pito-Prandl model pressure tube has a precision class of 0.5, but the range of measurements start only with 5 m/s. In the Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine was developed, created and perfected the standard stand RESVP-1, which allowed the creation of small air velocities. The considered method of aeromechanical measurements at low velocities of air flow provides the possibility of a very accurate setting of the speed of the crowding airflow affecting to the object under study, since in this case it is a linear velocity of movement the object being studied in motionless air. In the crowding flow affecting the object under study, no pulsations and vortices distorting the measurement results. Standard RESVP-1 is certified by standardization bodies Ukraine in the range of values of reproducible speeds from 0.000 to 1.200 m/s with the permissible value absolute error +(0.001 + 0.003V), where V is the reproducible flow velocity, m/s.
© The Authors, published by EDP Sciences, 2019
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