Hydrodynamic Features of Gas-Liquid Flow Movement in a Separation Device Plane Channel with an Oscillating Wall / Caracteristicile hidrodinamice ale mișcării unui flux gaz-lichid într-un canal plat al unui dispozitiv de separare cu un perete oscilant / Гидродинамические особенности движения газожидкостного потока в плоском канале сепарационного устройства с колеблющейся стенкой

• Published in: Problems of the regional energetics 2018-01, Vol.2018 (3)
• Main Authors: Gusak, O G, Ivanov VO, Sklabinskyi VI, Liaposhchenko, O O, Pavlenko, I V
• Format: Article
• Language: eng ; rum ; rus
• Subjects: Coagulation; Computational fluid dynamics; Computer simulation; Criteria; Droplets; Fluid flow; Liquid flow; Mathematical models; Process parameters; Separation; Variations; Velocity distribution
• ISSN: 1857-0070
• DOI: 10.5281/zenodo.2222360

In this paper, the movement of a gas-fluid flow in a plane channel with an oscillating wall was in-vestigated. The aim of the research is to increase the efficiency of separation equipment by imposing the vibration impact on a gas-liquid flow. This purpose was achieved by applying the phenomenon of selective coagulation of a dropping liquid. The novelty of the proposed approach concerns creating the mathematical model for determination of analytical dependences between the efficiency of the hydromechanical process and initial parameters of the separation device. As a result, quantitatively and qualitatively sufficient approximations for the scalar pressure and vector velocity fields were ob-tained with a permissible relative error in comparison with the results of numerical simulation. The presence of biharmonic fluctuation of particles was proved; besides, related dependencies for the cal-culation of vibration characteristics were obtained. Additionally, the paper presents the dependencies for identifying a range of thickness for a near-wall area. The system of dimensionless criteria was proposed for determining flow modes and relative trajectories of liquid droplets in a gas-fluid flow. The numerical simulation approach and related methodology of engineering calculations were pro-posed on the example of a plane channel of the separation device. Finally, the distance between ad-jacent zones of the pressure minimum was determined. As a result, it was found that this distance is equal to the wavelength of the vibrating impact to the flow that is an initial justification of further coagulation process of liquid droplets in a gas-liquid flow in a separation device. Se investigează mișcarea fluxului de gaz-lichid într-un canal plat cu un perete oscilant. Scopul acestei lucrări constă în sporirea efiicienței echipamentului de separare prin impunerea unui efect de vibrație asupra fluxului de gaz-lichid. Acest obiectiv este realizat prin utilizarea coagulării selective a fluidului picăturilor. Noutatea științifică constă în elaborarea modelui matematic pentru determinarea funcțiilor analitice a eficienței procesului hidromecanic a dispozitivului de separare. Estimarea directă a parametrilor sistemului "perete oscilant - amestec gaz-lichid" cu semnificații non-lineare este imposibilă. În lucrare se examinează un caz particular de mișcare a fluxului gaz-lichid, caracterizat de trei criterii non-dimensionale. S-au obținut relații analitice care reflectă calitativ și