title: Determination of rotational derivatives of a cylinder with a coaxially mounted disk in an air stream
metadata.name: dc.contributor.author
metadata.value: Ryabinin, Anatoly N.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Kaufman, Daniil V.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2021-05-04T19:55:07Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2021-05-04T19:55:07Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2021-03
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Ryabinin A.N., Kaufman D.V. Determination of rotational derivatives of a cylinder with a coaxially mounted disk in an air stream. Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, 2021, vol. 8 (66), issue 1, pp. 158–166.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu01.2021.114
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/28443
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The damped rotational oscillations of a cylinder whose length-to-diameter ratio is nine
  are considered. In the head part of the cylinder, a disc is mounted coaxially on the leg.
  The effect of the disk on damping oscillations is described by two parameters: the sum of
  the rotational derivatives mωz + mθz and the rotational derivative mθz. To determine these
  parameters in the aerodynamic tunnel of low speeds, an experiment is performed with the
  flow past a cylinder fixed on an elastic spring suspension. In the experiment, the diameter
  of the coaxial disk and the distance between the disk and the end of the cylinder varies.
  Deflected from the equilibrium position, the cylinder performs damping oscillations. The
  tension of one of the springs of suspension is measured using the strain gauge method.
  The signal is converted to digital form using the Velleman PCS500A PC oscilloscope and
  recorded to a file on the computer. Thus, the frequency of oscillations and the dependence
  of the amplitude of oscillations on time are determined. Disks whose diameter exceeds
  the diameter of the cylinder do not have a strong effect on the damping of oscillations
  of an elastically fixed cylinder. Disks of smaller diameter promote rapid damping of the
  oscillations. The presence of a large-diameter disk leads to a decrease in the coefficient mωz.
  A small-diameter disk acts in a opposite way.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Mathematics. Mechanics. Astronomy;Volume 8 (66); Issue 1
metadata.lang: -
metadata.name: dc.subject
metadata.value: wind tunnel
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: bluff body
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: damped oscillations
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: aerodynamic derivatives
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Determination of rotational derivatives of a cylinder with a coaxially mounted disk in an air stream
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 158-166.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/28443/1/158-166.pdf
resources.format: Adobe PDF
resources.size: 649,29 kB