Numerické modelování proudění tekutin s přestupem tepla a hořením v průmyslových aplikacích

Abstract

This thesis deals with experimental and numerical methods of combustion. The introduction is an analysis of the current state of the solution. It is concentrated only in the national scale, but also multinational, which offers very interesting to compare the approaches used. It describes in particular the work of authors dealing with numerical methods of fuel combustion and general fire / explosion. There are also carried out detailed analysis and the procedure for creating fire experiments on this issue. After a short introduction are described capabilities modeling of the software ANSYS FLUENT. In this work is placed great emphasis on methods of mathematical models of the general fire and explosions in confined spaces and the possible variants of their solution. In the next chapter are describes the laws of conservation of mass, momentum and energy. There are also discussed methods of mathematical modeling of turbulent flow, where is especially detailed explained technology of time averaging with the Businesquova hypothesis. Other passages describe two main approaches to modeling combustion. They are explained in detail and analyzed with regard to their ability to use depending on the solution task. The final chapter deals with the solved examples on the topic mathematical methods of combustion fuel and spread of fires / explosions. There are created mathematical models. Furthermore is done their comparison and validation with data obtained using the fire test. Finally, work is a consideration and discussion of the results solutions to these applications.