Engine Cooling
Detailed Engine Thermal Balance and Heat Distribution
See the Engine Cooling Brochure (PDF)
GT-SUITE offers the leading solution for the simulation of engine cooling. It has the unique
capability to predict engine thermal balance and heat rejection to water and oil. To predict
this heat distribution within the engine requires accurate handling of the "inner" cylinder
structure, the sources of heat (combustion and friction), the coolant and oil passages, and the
"outer" block structure. GT-SUITE offers unparalleled functionality within each of these areas.
To model the inner structure, GT-SUITE offers an easy to use parametric FE cylinder model,
unique within the industry. The GT-SUITE solver automatically builds the FE model in
seconds based on a relatively small number of numerical geometric inputs (no meshing!).
The resulting model includes the cylinder liner, piston and rings, head fire deck face, ports,
and valves. The boundary conditions from the combustion gases, coolant, and oil are
automatically applied to the FE model, along with the friction-generated heat that is deposited
on the piston, liner and rings. A rapid FE solver produces a solution in a small fraction of a
second, enabling the FE model even for long drive cycle transients.
The true strength of the FE cylinder model is the ability to obtain the gas side boundary
conditions from accurate GT-POWER engine models within GT-SUITE. GT-SUITE is the
industry standard for engine simulations, and correctly simulates the in-cylinder heat transfer
processes in a detailed fashion. Therefore, accurate temperature and heat transfer
coefficients can be applied to the FE cylinder surfaces. The integration of the FE structure
with the gas side engine model provides a predictive and transient capability that cannot
be achieved with measured heat rejection data nor with simple 5-mass lumped models.
The engine heat is transferred from the FE model to the coolant and oil circuits within the
block and head. These flow circuit models can be easily generated from CAD data using
the GEM3D pre-processing tool. Within the circuit volumes, GT-SUITE uses an advanced
solution methodology for compressible 1-D flow, based on the true Navier-Stokes solution.
This solution is more accurate than all other hydraulic simulation tools, especially under
transient or unsteady flow situations. The solution is inherently stable and therefore has no
problem predicting low or zero flow ("standing water").
This predictive approach to modeling the heat balance within the engine inherently accounts
for the interactions between the various sub-systems, and enables the study of advanced
concepts within engine cooling. The engine cooling sub-system may be integrated with other
sub-systems in GT-SUITE to create a virtual vehicle model.
An important capability of GT-SUITE is representation of the two-way interactions between
cooling and engine performance. As shown above, it can be used to study the effect of
cooling on CAC and EGR temperatures, which have an important effect on engine
performance under transient conditions.
Product Highlights:
- Easy-to-use parametric finite element cylinder structure
- Cylinder structure obtains gas side boundary conditions from accurate GT-POWER simulations
- Flexible cooling circuit representation
- Flow solution is based on Navier-Stokes equations (robust and stable)
- Always solves energy equation (thermo-hydraulics)
- Stable even with zero flow and thus “standing water” presents no difficulty
- Models of fluid circuits are built semi-automatically from CAD data
- Can utilize the accurate GT-POWER engine modeling under steady-state and transient operation
- Built-in FE solver predicts engine structure temperatures, steady state and transient
- Predicts engine thermal balance by detailed modeling of all heat sources
- Predicts heat rejection both to coolant and to the oil
- Represents the two-way interactions between cooling of CAC and EGR and engine performance,
as they are affected by ambient conditions and by transient driving schedules (drive cycles,
(accelerations, soak) - No extra cost, included in every GT-SUITE license
 For more information contact:(or contact us online) |
|
| Gamma Technologies, Inc. 601 Oakmont Lane, Suite 220 Westmont, IL 60559 USA |
Tel. Fax. (630) 325-5849 Email:CAE@gtisoft.com Web:www.gtisoft.com |
APPLICATIONS
Engine Performance
Test Pressure Analysis
Exhaust Aftertreatment
Acoustics
SiL, HiL, real-time
Vehicle, driveline
Hybrid Vehicles
Cooling Systems
AC and Rankine
Lubrication and bearings
Fuel Injection
Valvetrain, camshaft
Cranktrain, crankshaft
Chain, gear, belt drive