Underhood Cooling Modules
Unique 3D Flow Solution for Underhood Modules
See the Underhood Cooling Brochure (PDF)
GT-SUITE is quickly becoming the industry standard tool for predicting the air flow rate
and flow distribution in the vehicle underhood compartment, and the heat exchange
with various heat exchangers (radiator, A/C condenser, charge air cooler, oil cooler). The
strength of GT-SUITE lies in the true physics-based solution, state of the art model building
tools, and the ability to integrate the underhood model with any other vehicle sub-system.
GT-SUITE includes a state of the art pre-processing tool for efficiently building models of
the underhood cooling module. This tool, called COOL3D, provides a 3-D graphical
environment in which the complete underhood compartment may be built, including grill, heat
exchangers, fans, fan shrouds, and various objects that block flow (i.e. engine or structural
elements). This tool then discretizes the underhood into a coarse 3-D mesh of volumes, and
automatically generates a GT-SUITE underhood model.
The COOL3D tool divides the underhood air space into a coarse 3-D mesh, where each
element of the mesh is a rectangular prism. In this way, the GT-SUITE solver predicts flow
into or out of each volume through any of the 6 faces. In a similar way, heat exchangers and
fans are divided into smaller connected elements, so that the airflow and heat exchange are
predicted locally for each discretized element. Like all other fluid flow applications of
GT-SUITE, the solution of flow through an underhood cooling module involves the
simultaneous solution of the Navier-Stokes equations. The solution of heat exchange is
performed using a 3-regime Nusselt correlation that is automatically determined to best fit
measured performance data.
This approach provides a highly accurate, predictive, and spatially resolved solution
that does not require extensive calibration of "resistances" to match measured data
or CFD results (needed in all other commercial underhood tools). It also allows
3-dimensional flow phenomena such as flow around blockages or recirculation to be
accurately predicted. This enables underhood module optimization early in a program
before CFD data may be available, and also can minimize the configurations for which
full CFD analysis is required.
Due to the inherently transient solution and the flexible GT-SUITE architecture, a
GT-SUITE underhood model may be integrated with other sub-systems (engine, coolant,
A/C) to include a predictive underhood model within a larger system model. This
approach accounts for interactions between the various sub-systems, and enables
accurate predictions of the impact of underhood design changes on overall engine or
vehicle performance over transient vehicle drive cycles.
Product Highlights:
- Models flow through complex underhood cooling packages
- Represents air flow passing through a set of heat exchangers and fans
- Coarse 3D CFD solution based on Navier-Stokes equations
- This solution is predictive in nature, and thus is far superior to 1-D streamtube models
- Rapid calculation of underhood flow under steady state and transient flow conditions
- Flow discretization by a unique automatic CAD-based preprocessor COOL3D
- Contains models of all components of underhood module, including entry grille, radiator, CAC, EGR, and other coolers fan, shroud and few blockages
- Calculates 3D flow distribution produced by the various components
- Models heat exchanger heat transfer as a function of Reynolds number through the laminar, transition and turbulent regime.
- Accurate modeling of scaled heat exchangers due to fundamental physics
- Models produced by COOL3D are exported into GT-SUITE graphical interface where they are easily connected to the complete vehicle/engine model for a system simulation of a complete
system
 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