Theoretical And Application Research On Minisize Impinging Stream Technology Under Ultra-high Pressure

As support for one of the most important high-tech industries technologies, Particle refining technology is widely concerned by the academic and business interests, however, the present research on liquid particles refining in both theoretical and applied technology etc.This article is starting point, proposing a new technology, new method combining ultra-high pressure technology, micro-channel flow technology and impinging stream technology for the refinement of liquid particles.Because of characteristics of transient pressure, uniform, safe operation and low power consumption is widely used alcohol on Aging, food processing and other important fields. Micro-devices make better use of the high pressure energy because of its small size, good packing effect, high pressure; Also, because line scale is small, the gradient of some physical quantity increase rapidly, the mass transfer driving force increase, thereby possessing characteristics of good mixed quality; and still the adaptability, micro-devices can be used in conjunction with other systems. Impinging Stream technology is the adoption of two shares of the strong high-speed jet collision, so that inter-particle collisions with each other, extrusion pressure and shear force generated by grinding make liquid particles refining. Therefore, how to effectively integrate the three technical superiority, and apply to the study of grain refinement is the focus of this paper.By the theoretical analysis and study of micro-flow characteristics under ultra-high pressure micro-flow characteristics of jet impact the wall under ultra-high pressure and characteristics of the micro-jet flow to crash under ultra-high pressure, this paper further derive and prove relevant theories, realized improvement and expansion of existing theory, Combined with its theoretical research combining ultra-high pressure technology, micro-channel flow technology and impact streaming technology and design optimization of two ultra-high pressure micro-collision flow structures, and carry on experimental research in food and wine fields.(1) Flow characteristics of micro-channel under ultra-high pressureResearch on micr-channel flow properties and flow field under ultrahigh-pressure. micro-channel flow characteristics described from size effects, boundary layer effects and mass and momentum transfer detailed analysis of relationship of the side length and surface area when the square cross-section and when the corresponding circular cross-section relationship the diameter and surface area. based on the circular tube the boundary layer integral equations, derive turbulent thickness velocity boundary layer equation and velocity equation of the core area in macro-tube, thickness velocity boundary layer equation and velocity equation of the core area in micro-tube, on this basis, combination specific surface area calculation and analyze the quality of fluid transfer and momentum transfer characteristics in micro-size channel. A detailed analysis of the flow characteristics of micro-size pipe under ultra-high pressure state, establishment of an experimental model, numerical calculation, in different media, under different pressure, summary law of the velocity distribution, pressure distribution, wall shear stress distribution pattern and changing trends. Comparative analysis under the same conditions in the micro-tube and macro-size pipe flow differences, come to flow advantage of micro-size pipe.(2) Research of characteristics of the binding micro-jet impact the wall under ultra-high pressureSummary,derivation of symmetry constraints micro-jet ultra-high speed axis distribution formula and half the thickness extension formula. Make simulative analysis of ultra-high-pressure micro-jet impact on the wall with different turbulence models, identify the most suitable for micro-jet impact the wall turbulence model, Study, summarize the flow behavior and flow field of structural characteristics of the ultra-high pressure micro-jet impact the wall.(3) Research of characteristics of ultra-high pressure micro impinging streamStudied flow characteristics of ultra-high pressure micro-impinging flow (the collision), detailed numerical calculation and analysis of distribution curve of the velocity of the axial direction, radial direction velocity, dynamic pressure, static pressure, total pressure and the turbulent kinetic energy. Summed up characteristics of the ultra-high pressure micro impinging stream, reached the distribution law of the ultra-high pressure micro-impinging stream flow characteristics, and make analysis and explanation.(4) Design,optimization of ultra-high pressure micro-impact device structuresDesigned two kinds of ultra-high pressure micro-impinging device structures, presentation measure of knock-on effects based on impact velocity, Ultrahigh-pressure impinging stream, respectively optimize the size of two micro-generator structures to compare the advantages and disadvantages of the two structures.(5) Experimental study of ultra-high pressure micro-impinging stream technologyAccording to the compatibility characteristics of the liquid, respectively select the oil-water mixture, fruit juice, wine three substances, make experimental research on two kinds of designed structures, To determine the best structure and the appropriate operating parameters, make analysis of mechanism of micro-emulsion, apple juice and alcohol mechanism of Aging, put forward a new way combining dynamic and static approach to increase the supply pressure,sum up experience, in order to accumulate the necessary industrial the original data.