Software LEC CORA - Large Engines Competence Center LEC

LEC CORA Key Features

Zero-dimensional analysis and simulation of the high-pressure part of the working process based on one- and two-zone models, taking into account different wall heat transfer models, as well as fuels (gasoline, diesel, natural gas, H2,…) and fuel combinations (dual-fuel).
Simulation of combustion for a variety of modern combustion processes (open chamber, prechamber, DI,…)
Detailed breakdown of losses for pressure curve analysis and combustion rate simulation
Simulation of nitrogen oxide emissions
Knock detection and knock simulation

Get in touch

Loss analysis
Burn rate simulation
Analysis and simulation

Loss analysis

LEC CORA is capable of calculating a detailed breakdown of the individual losses of the engine process both as part of the analysis of an existing measured pressure curve and as a preliminary simulation based on predicted combustion rate curves for a wide variety of engine concepts and fuels. The core of this is the determination of the theoretically achievable efficiency of the perfect engine. Based on this, the losses of the real engine compared to the ideal process of the perfect engine are calculated, e.g. losses due to imperfect combustion, real combustion process, wall heat transfer, charge exchange as well as mechanical losses. In addition, pressures, temperatures and many other interesting quantities can be output separately for each analysis stage.

Combustion rate simulation for a dual-fuel large engine

In this example, the ignition delay and combustion rate model LEC-DFCM integrated in LEC CORA is used to simulate combustion in dual-fuel large engines with the fuels natural gas and diesel, which is based on the simulation of diffusion combustion by means of a package model and premixed combustion by means of an entrainment model. For example, ignition delay , combustion rate curve, temperatures, pressures, nitrogen oxide emissions and many other interesting variables are calculated. In addition, these calculations can in turn be combined with a detailed breakdown of the individual losses.

Analysis and simulation of a large gas engine with prechamber

The LEC-PCM combustion rate model can be used for the analysis and simulation of a large gas engine with prechamber. Different fuels, such as natural gas, hydrogen, but also various gaseous e-fuels (synthetic fuels) can be used. All parameters such as combustion rates, temperature curves, air conditions and nitrogen oxide emissions can be determined separately for the pre-chamber and main combustion chamber. In addition to the calculation of the overflowing masses between the pre-chamber and the main combustion chamber, a loss analysis can also be carried out here and an analysis of the individual losses can be output.

LEC CORA IN PRACTICE

The highly flexible software package can be used to analyze and simulate a wide range of processes in the combustion engine. LEC CORA can be flexibly adapted to customer requirements and can be integrated into simulation programs from other suppliers. LEC CORA was developed to close a gap: Although there are many software solutions for engine analysis, they are often limited in their flexibility and especially in their use for highly specialized applications. LEC CORA addresses precisely this issue and focuses specifically on combustion engines – the area in which the LEC team has built up expertise and an international reputation over decades.

Applicable for different fuels

The LEC CORA software package enables the zero-dimensional analysis and simulation of different working processes in the combustion engine, with automated evaluation. The focus is on the high-pressure part of the working process based on one- and two-zone models, taking into account various wall heat transfer models. It is possible to work with different wall heat transfer models as well as fuels (gasoline, diesel, natural gas, H2,…) and fuel combinations (dual-fuel). LEC CORA is also the ideal solution for knock detection and knock simulation as well as the simulation of nitrogen oxide emissions.

Simulation and analysis

Due to its modular structure, LEC CORA is also compatible with other software solutions (e.g. 1D charge exchange calculation), which enables even greater flexibility. Both simulation and analysis can be implemented with the innovative software. For example, an optimal combustion process can be simulated for a variety of modern combustion processes (open chamber, prechamber, DI …) and measurement data can be obtained from this. An analysis based on an actual measurement is also possible.

Software

LEC CORA

LEC CORA Key Features

Get in touch

LEC CORA IN PRACTICE

Downloads