Brennparameter

Brennparameter is a term used in German-language combustion literature to denote the parameters that describe the state, progress and outcome of a burning process. It functions as an umbrella category for quantities that characterize how a fuel-air mixture ignites, propagates a flame and releases energy under given conditions. The exact set of Brennparameter depends on the application, modeling approach or measurement goals.

Common examples of Brennparameter include the equivalence ratio (phi), which indicates the richness of the mixture; the laminar burning velocity, which describes how fast a flame front propagates in a quiescent mixture; and the adiabatic flame temperature, which estimates the maximum flame temperature under idealized conditions. Other important parameters are the heat release rate, which quantifies the rate of chemical energy release, and ignition delay, which measures the time between initiation and sustained flame propagation. Emissions-related parameters such as concentrations of CO, CO2 and NOx, as well as overall combustion efficiency, are often treated as Brennparameter in process control and diagnostics. Residence time, pressure, and temperature within the combustion chamber may also be included when relevant.

In practice, Brennparameter are used for experimental analysis, numerical modeling and control of combustion systems. They are measured with sensors and analyzers (temperature, pressure, gas composition) or derived from simulations (CFD, chemical kinetics models). Applications span internal combustion engines, gas turbines, and industrial furnaces, where Brennparameter inform optimization for efficiency, emissions reduction and flame stability. The term is general; specific fields may use more specialized terms like Brennrate, Verbrennungsparameter or Brennkennwerte.