engineering

Engines, aircraft engines or gas turbines are just a few examples of technical combustion systems. The energy chemically bound in the fuel is converted into other forms of energy with the help of a combustion process. Combustion control is crucial to develop efficient and low-emission systems. As a prediction tool, computer simulation is already making a major contribution that will continue to grow in the future. The simultaneous further development of turbulence and combustion models is crucial in order to...

The interaction of flames and combustion chamber walls occurs in almost all common technical combustion systems. Incomplete combustion leads to an increased formation of pollutants in the area close to the wall. Current developments to increase the efficiency of internal combustion engines and aircraft engines are often based on reducing combustion chambers while maintaining or increasing performance. The more compact combustion chambers increase the surface-to-volume ratio, so that the flame-wall interaction will become more important in future combustion system developments....

The use of mobile devices and the sale of mobile applications/applications (apps) continue to increase rapidly. It is expected that smartphones will soon replace computers and laptops as the most used end device. These trends result in new challenges for companies across all industries, which put great pressure on them. The only way companies can withstand this pressure and stay competitive is to develop their own mobile strategy and ensure that strategy is aligned with overall corporate strategy. On the...

Coal has been mined and extracted worldwide for some time. This raw material, which has been described as the engine of industrialization, is mainly used for power generation and steel production and gives countries with sufficient reserves an important position in the world economy by being able to produce their own energy. Germany is one of the countries with the highest coal reserves in the world. RAG Deutsche Steinkohle is part of the RAG Aktiengesellschaft group of companies and is...

A water pipe that purifies its contents as it flows? A coating that breaks down air pollutants as they flow by? A surface that disinfects itself and keeps itself clean? What sounds like science fiction becomes possible with the photocatalyst titanium dioxide. Under UV light, titanium dioxide is able to purify air and water, kill bacteria on its surface and break down fats. Although these properties have been known since the 1970s, the breakthrough of photocatalytically active titanium dioxide is...

The larger insulating material thicknesses, the demands on the aesthetics of a flat roof structure and larger spans have led to the development of the fully insulated, prefabricated Multibox element as a flat roof. Due to the arrangement of the load-bearing wooden elements between the vapor barrier and the roof skin without a rear ventilation level, the construction is not unproblematic from a building physics point of view. In addition, the number of cases of damage to such constructions has...