Abstract
Mass and multi-purpose use of air-mechanical foams from gas-liquid mixtures predetermines the need to establish the physical and technical patterns of their formation in high-efficiency generating plants. The paper presents the results of optimizing the foaming regimes, taking into account the joint influence of all probable factors coming from the technology of the process of obtaining stable disperse structures. A regression model has been developed that makes it possible to determine optimal parameters of the foaming regime with the required structure and thermal properties.
Highlights
Optimization of the process of generation of air-mechanical foams from gas-liquid mixtures with the aim of obtaining structured systems with specified technical properties should be based on the study of complex metastable physicomechanical regularities of their formation in foam generator installations.Their defining feature is the presence of a pressure gradient and a multiplicity of foam along the length of the foaming channel, which leads to an inhomogeneous viscosity of the mixture and the instability of the velocity of its movement [1, 2]
The overwhelming number of studies pertains to the analysis of the already formed foams in the cylindrical channel, which eliminates the possibility of taking into account the influence of the ratio of the initial phases, the initial level of the gas kinetics and other parameters
The gas-liquid mixture obtained in the mixer was supplied to the cylindrical channel (8), which consisted of glass tubes 25 mm in diameter, joined on the one side by glass adapters, and on the other hand by segments of a re-zirconium sleeve of the same diameter
Summary
Optimization of the process of generation of air-mechanical foams from gas-liquid mixtures with the aim of obtaining structured systems with specified technical properties should be based on the study of complex metastable physicomechanical regularities of their formation in foam generator installations Their defining feature is the presence of a pressure gradient and a multiplicity of foam along the length of the foaming channel, which leads to an inhomogeneous viscosity of the mixture and the instability of the velocity of its movement [1, 2]. The a priori uncertainty of the mentioned parameters makes it very difficult to calculate the head and length of foamwater, which allow to form stable structures of the required quality Existing studies in this direction [3,4,5], as a rule, concern the evaluation of the influence of individual factors on the kinetics of the process or the change in the viscosity of the forming mixtures. The overwhelming number of studies pertains to the analysis of the already formed foams in the cylindrical channel, which eliminates the possibility of taking into account the influence of the ratio of the initial phases, the initial level of the gas kinetics and other parameters
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