The power of these burners lies at the upper end of the kW to lower MW range and these units are employed in large offices or department stores, stadiums or airports. They no longer have their own combustion chamber and are instead operated in conjunction with an extremely wide and diverse range of boilers made by other manufacturers. This means that the burners need to deliver stable operating characteristics in the context of different geometries and varying conditions. It is therefore important to have a detailed knowledge of the oscillation tendency of these burners in order to estimate the risk of instability when they are used in different geometries. IfTA GmbH has carried out corresponding investigations.

In contrast to small-scale furnaces, e.g. gas thermal value equipment, heating devices etc. intended primarily for residential use, and offered as complete units, e.g. in conjunction with burners, boilers, heat exchangers and exhaust systems, large-scale furnaces are assembled individually from components sourced from various manufacturers. Products manufactured by burner manufacturers might for example be used in conjunction with boilers from another manufacturer. While it is true to say that combustion instabilities are always dependent on the overall system, i.e. burner, combustion chamber, exhaust and air intake system, certain tendencies favouring unstable characteristics can be detected at an early stage directly on the burner. For example, certain phenomena arising from mechanical flow properties might give rise to certain frequency components occurring on a larger scale than others during the combustion process. If these areas are close to the acoustic eigenfrequency of a boiler, and if other unfavourable conditions are also in place, there is a high probability of a link between combustion and acoustics, i.e. instabilities can be excited.

IfTA GmbH offers a wide and diverse range of investigations into the aforementioned causes of combustion instabilities. These investigations include measurements conducted directly on the affected system or on our customers' test rigs. To support these experimental investigations of the phenomenon, it is also advisable to conduct numerical simulation of the acoustic characteristics of boiler geometries.

As a customer, you can rely here, as in other sectors, on prompt expert and cost-effective support with your problems. It goes without saying that we will always treat your problem in complete confidentiality.