IC-Engine Calibration Using GT-Power and GT-Suite 

                                        IC-Engine Calibration Using GT-Power and GT-Suite 

                                                                      Assingment:1

 

Q. Explore the GUI of GT SUITE and list down modules available with brief description.

A. 

GT-SUITE is a Engine, Powertrain, and vehicle engineering simulation software. The GT-SUITE simulation consists of a set of simulation modeling libraries-tools for analyzing engine breathing, combustion and ecoustics, vehicle power trains, engine cooling systems, engine fuel injection systems, valvetrains, crankshafts and lubrication systems. It is one of the multiphysics CAE system simulation software. The GT-SUITE  includes a complete library of physics based modeling templates covering fluid flow, thermal, mechanical, electrical, magnetic, chemistryand controls. Also for higher level modeling some special templates are also provided for specific applications. 

 

GT SUITE:

                

                                     

 

GT-ISE (Integrated Simulation Environment) - 

GT-ISE provides interface where models are built, simulation settings are declared and simulations are launched. Here various components are brought into a project map an all are inter connected together linkig the complete model into a single system.

               

 

 

GEM_3D and COOL_3D -

GEM3D is a 3D graphical pre-processor that combines uilding and importing tools that are used to create 1D GT SUITE models from 3D geometries. Here models can be imported and built in 3D. Also exhaust systems can also be imported or built from the scratch.Not only can 3D models imported and characterized but additional components can also be added to the models in GEM3D. The GEM3D tool easily converts CAD geometry of flow networks into 1D GT-Models. The COOL 3D tool allows for 3D model building and automatic export of underhood cooling module models. COOL3D is also accessed through GEM3D is included in GT-SUITE.  

                 

 

VTDESIGN - 

VT Design is a graphical preprocessing tool for valvetrain and cam design. Kinematic and Quasi dynamic analysis can be run and viewed directly from the VTDESIGN interface. Here CNC cutting tool path can also be calculated from kinematics. It includes cam design tool for modelling or creating cam profiles using various methods. Also Spring design tool is provided to create and modify spring shapes using geometry changes or force vs displacement curves.

                        

 

GT SPACECLAIM - 

GT-SPACECLAIM is a 3D CAD tool used for model building and preparation. It helps in importing and converting common CAD formats to GEM3D and COOL3D. Simplifying geometry to prepare model for preparation. GT-SPACECLAIM uses built-in translation tool to import common CAD formats into GT-SUITE. This tool also supports various formats to import geometry which helps to repair or replace missing surfaces i.e. simplifying geometry. Also it contains building tools in order to model a fully-featured parts.

                       

 

GT-POST -

It is a ploting and data handling tool used by the GT-SUITE. Once the simulation is complete, the results obtained are viewed in GT-POST. This is a graphical interface that enables viewing and manuplating of the data that is collected from the simulation performed. It quickly generates 2-D and 3-D plots also combine data from different cases, simulations into a singe plot. Cross-plotting of results from various simulations are also allowed by using post processing templates. This tool helps to perform math operations for the data in all the plots.

                 

 

GT-SUITE license provides access to multiple applications to perform.    

Modules in GT-SUITE:-

 GT-SUITE provides comprehensive set of validated 0D/1D/3D multiphysics component library, which can simulate the physics of Fluid Flow, Thermal, Mechanical, Multi-Body, Structural, Electrical, Chemistry, Controls, Magnetic etc.

             

 Flow library (any fluid, gas or liquid or mixture)

Acoustics library (both non-linear and linear)

Thermal library (all types of heat transfer)

Mechanical library (kinematics, multi-body dynamics, frequency domain)

Electric and Electromagnetic library (circuits, electromechanical devices)

Chemistry library (chemical kinetics)

Controls library (signal processing)

Built-in 3D CFD and 3D FE (thermal and structural)

 

 

Flow:

Generally the each main module contains sub-modules i.e. components, connections and references which contains the templates. Each sub modules include different templates.

Components in the Flow

Flow contains templates  like pipe, tank, inflow valves etc which are used for setting up the required case. Each template decribes its own function i.e. End Environmet represents the boundary conditions of pressure, temperature etc. Similarly, PipeRound template helps to model pipes that have a round cross-section.  

Connections in the Flow

This template models helps to calculate the mass flow rate between the adjacent flow volumes. They represent how the flow is and helps to calculate flow parameters.

References

These references are not the physical part. It helps to display where all the things are used. It defines solver settings for the flow solver. Also describes the properties of gases.

 

Flow Structure:-

Example:     

The procedure followed is we should create Templete, from the templete create various objects. Finally, from objects create required parts.

        

Mechanical:

In this module we can bascially look at the mechanical parts like cylinder geometry, compression ratio, piston diameter, firing order etc. The parameters for size , shape and other required mechanisms are modified during the simulation.

Thermal:

Here it helps to define the thermal properties of various materials when the component wall temperatures are calculated.

Electromagnetic:

This is specified in areas where use data for receiving and transmitting various signals. It contain various models that are relavent to the electrical properties and functions. It alos provides template for joining the two electrical branches.

Control:

It bascially includes control systems like Actuators and sensors to handle the simulation. This system helps to link between control library and tehe actual physics library .  Also control sensor helpsto link various physical parts like flow, mechanical, electrical, thermal parts to the control component parts.

 

Q.  

Locate following setting:

• Time control flag 
• Time step and solution control 
• Integrator/Solver type 

A. 

Time Control Flag -  This is used to assign time parameters to the simulation i.e. specifying the simulation duration and also we can set our convergence criteria (ON/OFF). Simulation time can be expressed in multiple ways i.e. by cycles or seconds.

 

Time Step and Solution control - This helps to manage the time step along with the flow setting i.e. we can select the mode of flow setting, which means we can select implicit or explicit.

 

Integrator / Solver Type -   This bascially helps for time marching of ODE's present in the libraries.

 

 

Q.  Explore intercooler tutorial and note down all settings of:

• Run setup 
• Advanced setup
• Plot setup 
• Output setup

A.

     

 

Run setup settings -

 

Advanced setup settings -

 

 

Plot setup settings  - 

 

 

Output setup Setting - 

 

Q.  Problem:  Given

• Diameter of cooler inlet and outlet pipe= 50 mm
• Length of the CAC= 1000 mm
• Inlet mass flow rate = 1200 kg/ h at 100 degC
• Outlet pressure 2 bar at 30 deg C

Calculate the total heat transfer at Charge Air Cooler (CAC)

Calculate pressure drop across CAC.

 A.

Importing Setup from tutorials:-

Setting up Case:-

PostProcessing:-

 

Results:-

Pressure drop:

Pressure drop across CAC= 0.0837 bar.

 

Net Heat Transfer Rate:

Total Net Heat Transfer Rate at CAC = 8.731KW

 

Therefore, 

Total net heat transfer rate =  8.731KW and Pressure drop across CAC= 0.0837 bar.