Utveckling av metod för turbulenta heterogena jetstrålar
- Diarienummer
- UKR22-0025
- Projektledare
- Kazachkov, Ivan
- Start- och slutdatum
- 220501-231231
- Beviljat belopp
- 1 000 000 kr
- Förvaltande organisation
- KTH - Royal Institute of Technology
- Forskningsområde
- Materialvetenskap och materialteknologier
Summary
The main objective is development of the mathematical model and computer program for processes of mixing and heat transfer in a two-fluid turbulent heterogeneous jet of mutually immiscible liquids. Many natural and technical processes (especially - chemical-technological ones) deal with this problem, e.g. oil-water turbulent jets, where it is important to know distribution of the phases in a flow, not only flow parameters. The application of method may be useful in some other important engineering problems, therefore the method is developed for more broader field, as well as the numerical approach and computer program for simulations must be prepared. The differential equations for the axially symmetrical two-dimensional stationary flow and the integral correlations in a cylindrical coordinate system are considered and analyzed for the jet of fluid going from a nozzle into a pool of another fluid immiscible with the first one. The original method is based on introduction of the so-called function-indicator of the phases. It was well proven on solution of some practical tasks and successfully compared with the experimental data. The goal is to further develop and substantiate the method and prepare easy tools for its application in practice. The results may be of interest for experts in multiphase turbulent jets as far as it allows computing important characteristics, which cannot be got by existing methods. The lecture course by the modeling of such flows may be given too.
Populärvetenskaplig beskrivning
Some liquids like oil and water are not miscible due to what they are flowing together like a multi-phase system. For example, in a turbulent jet of such two liquids one or other are in the flow present as the drops or small droplets inside the other liquid. Therefore, the common methods of fluid dynamics do not work in this case, do not describe this kind flows. But in a number of applications it is crucial to know how the phases are distributing in a volume of flow and how they are interacting each other. Without this, computing of flow parameters is very approximate and can be even absolutely wrong. We first met such problem when we were developing the new jet type steel making machine in Ukraine in the 1980-th. It was proposed the method for multi-phase jet flows, which was applied and revealed successful. Also it was invented special two-phase sensor for experimental study to measure both, the parameters of flow and amount of specific phase at each point. During last 30 years Ukrainian science was financed at very low level and this method was not developed for application in a broader field. Now the progress in all directions of science and technology including the micro electronics and computer science give possibility to develop the method for easier and broader application in a number of problem for chemical technology, food industry, metallurgy, etc. Also it is available to develop and propose for industrial production special micro sensor for multi-phase flows. We intend develop method computer programs for its realization, give simple tool available for scientists and engineers to compute parameters of the flows of two immiscible liquids. In long perspective it is available to spread it for more than 2 phases. The results of project may be useful for some important industries so that will give profit. With this method we computed parameters of the new jet type steel making process, which was successfully proven but not realized due to lack of materials working in agressive high temperature medium. If there are now available such materials due to acievements of the material science and technology, then steel making jet machine will be developed in cooperation with material scientsts.