Open AccessИсследование реакции поверхности жидкости на импульсное воздействие наклонной газовой струи при малых числах Рэйнольдса
Author(s) -
А.П. Савенков,
В.А. Сычёв
Publication year - 2022
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/jtf.2022.02.52010.251-21
Subject(s) - drag , mechanics , jet (fluid) , reynolds number , viscous liquid , viscosity , bubble , surface tension , action (physics) , physics , classical mechanics , materials science , thermodynamics , turbulence , quantum mechanics
A mathematical description of the motion of a cavity on the liquid surface under an oblique action of a gas jet is obtained using the well-known expressions for the movement of a gas bubble in a liquid. The boundary of the viscous drag force domination over the form drag force is determined. The impingement of the gas jet on the liquid surface is considered as a dynamic object of the automatic control theory. It is found that the dynamic properties of the two-phase system "gas jet - liquid" are described by the integrator equations. Using a specially designed setup, the transient response of the "gas jet - liquid" system were experimentally obtained for the aerodynamic action at angles of 20º and 50º to the surfaces of liquids with the viscosities of 0.71 and 26.1 Pa•s (Reynolds number Re < 2). The research results are necessary for the analysis of the non-contact aerodynamic method of liquid viscosity measurements.