Open AccessStudy of the influence of an external flow rate perturbation on the vortex structure and heat transfer in impinging jets
Author(s) -
M. P. Tokarev,
Mikhail Yu. Nichik,
O. A. Gobyzov,
С. С. Абдуракипов,
В. М. Дулин
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2057/1/012099
Subject(s) - strouhal number , mechanics , vortex , turbulence , heat transfer , forcing (mathematics) , perturbation (astronomy) , flow control (data) , physics , volumetric flow rate , materials science , reynolds number , engineering , atmospheric sciences , telecommunications , quantum mechanics
The study of physical processes dominating in submerged turbulent jets impinging on a wall is an important task because this configuration is utilized in various applications. The efficiency of heat transfer in this configuration has been a subject of a long-term study. Active flow control technique and the optimization of the control signal can be applied to exploit inherent flow properties to further improve the heat transfer from the wall in impingent jets. In this paper, IR-thermography and time-resolved PIV measurements are used for the diagnostics of wall temperature fields and large-scale vortex dynamics under external flow rate forcing control. It is found that the low-frequency forcing (for the Strouhal number St = 0.6) increases integral temperature on the wall as compared to the unforced case and the high-frequency forcing (St = 0.9).