The subsonic velocity blocking effect for an aerodynamic vortex chamber

et al. 2021

J. Phys.: Conf. Ser.

Self Cite

Visualisation via video recording was carryed out in a Ranque-Hilsch vortex tube with a square cross-section. Video files were captured at recording speeds from 1000 to 10 000 frames per second. The best video files were obtained at a shooting frequency of 7600 frames per second with an input pressure of 1 bar. The video confirmed the presence of a double helix in the flow core in the second section of the tube. The video files showed the presence of a circulation zone between the flow core and the periphery, which is constantly changing over time. It can be clearly seen the angle at which the particles move in the peripheral flow.

Section: Experimental Stand and Measurement Methodsmentioning

confidence: 99%

Visualization in the Ranque-Hilsch vortex tube using high-speed video recording

Gordienko

Yavorskii

et al. 2021

J. Phys.: Conf. Ser.

Self Cite

The Flow Crisis and an Inner Source of Heating in the Vortex Tube

Kabardin

Polyakova

et al. 2020

J. Phys.: Conf. Ser.

The analysis of current complex experimental investigation of the vortex tube with square cross section is made focusing on the criticality of the inner flow in the framework of the flow crisis concept. The criticality condition is proved to take place in the vortex tube by operating with LDA obtained velocity experimental data. As the measured axial velocity exceeds the calculated velocity of centrifugal elastic waves on the boundary between the longitudinal circulation zone and the near wall swirling jet, two scenarios are supposed possible for the transition of the supercritical state to a subcritical one, similar to the vortex breakdown in a swirling jet at its discharge into the quiet liquid volume: the mild oscillations or a series of hydraulic jumps become possible, leading to a flow pattern choke change with the transformation to heat of excess kinetic energy.

Visualization in a Ranque-Hilsch vortex tube using high-speed video recording

Gordienko

Yavorskii

et al. 2022

Interexpo GEO-Siberia

Visualisation via video recording was carried out in a Ranque-Hilsch vortex tube with a square cross-section. Video files were captured at recording speeds from 1000 to 10 000 frames per second. The best video files were obtained at a shooting frequency of 7800 frames per second with an input pressure of 1 bar. The video confirmed the presence of a double helix in the flow core in the second section of the tube. Video files showed the presence of a circulation zone between the flow core and the periphery, which is constantly changing over time. The angle at which the particles move in the peripheral flow is clearly visible on it. The resulting video files show how the core of the flow precesses on the axis of a square-section vortex tube.