The SRM Engine Suite is an engineering software tool used for simulating

fuel A fuel is any material that can be made to react with other substances so that it releases energy as thermal energy or to be used for work. The concept was originally applied solely to those materials capable of releasing chemical energy bu ...

combustion Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. Combust ...

and

exhaust gas Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline (petrol), diesel fuel, fuel oil, biodiesel blends, or coal. According to the type of engine, it is discharged into the atmosphere through a ...

emissions in

internal combustion engine An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal co ...

(IC engine) applications. It is used worldwide by leading IC engine development organisations and fuel companies. The software is developed, maintained and supported by CMCL Innovations, Cambridge, U.K.

Applications

The software has been applied to simulate almost all engine applications and all transportation fuel combinations with many examples published in numerous leading peer-reviewed journals, a brief summary of these articles is presented here. #

Spark ignition A spark-ignition engine (SI engine) is an internal combustion engine, generally a petrol engine, where the combustion process of the air-fuel mixture is ignited by a spark from a spark plug. This is in contrast to compression-ignition engines, ty ...

mode: Sub-models to simulate

Direct Injection Spark Ignition Gasoline direct injection (GDI), also known as petrol direct injection (PDI), is a mixture formation system for internal combustion engines that run on gasoline (petrol), where fuel is injected into the combustion chamber. This is distinct fro ...

engines for regular flame propagation events, PM and

NOx In atmospheric chemistry, is shorthand for nitric oxide () and nitrogen dioxide (), the nitrogen oxides that are most relevant for air pollution. These gases contribute to the formation of smog and acid rain, as well as affecting tropos ...

emissions. Further analysis of knocking and irregular combustion events are facilitated through the implementation of user-defined or the chemical kinetic fuel models included with the tool. # CIDI (diesel) combustion mode: Sub-models for direct injection, turbulence and chemical kinetic enable the simulation of diesel combustion and emission analysis. Typical user projects have included combustion, PM and

simulation over a load-speed map, virtual engine optimization, comparison with 3D-

CFD __NOTOC__ CFD may refer to: Science and computing * Computational fluid dynamics, a branch of fluid mechanics using computational methods to predict the behavior of fluid flows * Counterfactual definiteness, the ability, in quantum mechanics, t ...

and injection strategy optimization. # Low temperature combustion mode: Known as

HCCI Homogeneous Charge Compression Ignition (HCCI) is a form of internal combustion in which well-mixed fuel and oxidizer (typically air) are compressed to the point of auto-ignition. As in other forms of combustion, this exothermic reaction releases e ...

or premixed CIDI combustion (PCCI, PPCI), ignition and flame propagation in low temperature combustion mode is more sensitive to fuel chemistry effects. By accounting for user defined or by applying the default chemical kinetic fuel models, users do benefit from enhanced predictive performance. Typical projects include identifying the operating and misfire limits for multiple fuel types. # Advanced

s: To date the model has been applied to conventional diesel, gasoline, blends of gasoline and diesel, bio-fuels, hydrogen, natural gas, and ethanol-blended gasoline fuel applications. #

Exhaust gas Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline (petrol), diesel fuel, fuel oil, biodiesel blends, or coal. According to the type of engine, it is discharged into the atmosphere through a ...

emissions: Through the implementation of detailed chemical kinetic in both the gas and solid

particulate Particulates – also known as atmospheric aerosol particles, atmospheric particulate matter, particulate matter (PM) or suspended particulate matter (SPM) – are microscopic particles of solid or liquid matter suspended in the air. The t ...

phases, all conventional automotive and non-road

emissions are simulated in detail. SRM Engine Suite GIF

The model

The software is based on the

stochastic Stochastic (, ) refers to the property of being well described by a random probability distribution. Although stochasticity and randomness are distinct in that the former refers to a modeling approach and the latter refers to phenomena themselve ...

reactor

model A model is an informative representation of an object, person or system. The term originally denoted the plans of a building in late 16th-century English, and derived via French and Italian ultimately from Latin ''modulus'', a measure. Models c ...

(SRM), which is stated in terms of a weighted stochastic particle ensemble. SRM is particular useful in the context of engine modelling as the dynamics of the particle ensemble includes detailed

chemical kinetics Chemical kinetics, also known as reaction kinetics, is the branch of physical chemistry that is concerned with understanding the rates of chemical reactions. It is to be contrasted with chemical thermodynamics, which deals with the direction in ...

whilst accounting for inhomogeneity in composition and

temperature Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured with a thermometer. Thermometers are calibrated in various temperature scales that historically have relied on ...

space arising from on-going

fuel injection Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All com ...

heat transfer Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy (heat) between physical systems. Heat transfer is classified into various mechanisms, such as thermal conduction ...

and

turbulence In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity. It is in contrast to a laminar flow, which occurs when a fluid flows in parallel layers, with no disruption between ...

mixing events. Through this coupling, heat release profiles and in particular the associated

emissions (

Particulates Particulates – also known as atmospheric aerosol particles, atmospheric particulate matter, particulate matter (PM) or suspended particulate matter (SPM) – are microscopic particles of solid or liquid matter suspended in the air. The ...

Carbon monoxide Carbon monoxide ( chemical formula CO) is a colorless, poisonous, odorless, tasteless, flammable gas that is slightly less dense than air. Carbon monoxide consists of one carbon atom and one oxygen atom connected by a triple bond. It is the si ...

Unburned hydrocarbon Unburned hydrocarbons (UHCs) are the hydrocarbons emitted after petroleum is burned in an engine. When unburned fuel is emitted from a combustor, the emission is caused by fuel "avoiding" the flame zones. For example, in piston engines, some of th ...

''etc''.) can be predicted more accurately than if using the more conventional approaches of standard homogenous and multi-zone reactor methods.

Coupling with third party software tools

The software can be coupled as a plug-in into 1D engine cycle software tools, are capable of simulating the combustion and emissions during closed volume period of the cycle (

, TDC and negative valve overlap). An advanced Application programming interface enables for the model to be coupled with a user-defined codes such as 3D-CFD or control software.

References

External links

* {{official website, http://www.cmclinnovations.com/srmsuite Engines Combustion Computational science Fluid dynamics

Applications

The model

Coupling with third party software tools

See also

References

External links