Research output: Contribution to journal › Article › peer-review
Calculation of the flow around an oscillating cylinder with a coaxial disk in the head at low Reynolds numbers. / Рябинин, Анатолий Николаевич; Кауфман, Даниил Витальевич.
In: Technical Physics, Vol. 69, No. 6, 26.09.2024, p. 1780–1786.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Calculation of the flow around an oscillating cylinder with a coaxial disk in the head at low Reynolds numbers
AU - Рябинин, Анатолий Николаевич
AU - Кауфман, Даниил Витальевич
PY - 2024/9/26
Y1 - 2024/9/26
N2 - Abstract: The hypothesis of curved models is used to calculate the flow around a cylinder performing damped rotational oscillations in the air flow. The influence of a disk coaxially fixed in the head of the cylinder on the oscillations is studied. The elongation of the cylinder (the ratio of the length of the cylinder to its diameter) is nine. The diameter of the disk is equal to 0.6 of the diameter of the cylinder. It is assumed that the only reason for the damping of on the oscillations is aerodynamic force. The parameters characterizing the attenuation of rotational on the oscillations of the cylinder occurring in the air flow at the Reynolds number Re = 750 are determined. It turned out that the presence of a coaxial disk in the head leads to a faster attenuation of on the oscillations. This fact is in qualitative agreement with the results of an experiment to determine rotational derivatives in a wind tunnel at large Reynolds numbers. The hypothesis of quasi-stationary is applied in the calculation of translation vibrations of the cylinder. The parameter characterizing the damping of vibrations of a cylinder with a disk in absolute magnitude slightly exceeds the same parameter for a cylinder without a disk, which corresponds to the results of the experiment.
AB - Abstract: The hypothesis of curved models is used to calculate the flow around a cylinder performing damped rotational oscillations in the air flow. The influence of a disk coaxially fixed in the head of the cylinder on the oscillations is studied. The elongation of the cylinder (the ratio of the length of the cylinder to its diameter) is nine. The diameter of the disk is equal to 0.6 of the diameter of the cylinder. It is assumed that the only reason for the damping of on the oscillations is aerodynamic force. The parameters characterizing the attenuation of rotational on the oscillations of the cylinder occurring in the air flow at the Reynolds number Re = 750 are determined. It turned out that the presence of a coaxial disk in the head leads to a faster attenuation of on the oscillations. This fact is in qualitative agreement with the results of an experiment to determine rotational derivatives in a wind tunnel at large Reynolds numbers. The hypothesis of quasi-stationary is applied in the calculation of translation vibrations of the cylinder. The parameter characterizing the damping of vibrations of a cylinder with a disk in absolute magnitude slightly exceeds the same parameter for a cylinder without a disk, which corresponds to the results of the experiment.
KW - air flow
KW - calculation
KW - coaxial disk
KW - cylinder
KW - translational and rotational oscillations
UR - https://www.mendeley.com/catalogue/300e1957-d79c-34ff-a314-b77b07ed441d/
U2 - 10.1134/S1063784224060409
DO - 10.1134/S1063784224060409
M3 - Article
VL - 69
SP - 1780
EP - 1786
JO - Technical Physics
JF - Technical Physics
SN - 1063-7842
IS - 6
ER -
ID: 126031630