Week 1 : Exploring the GUI of GT-POWER

Introduction:

GT Suite is the CAE simulation tool with capabilities and libraries aimed at a vide range of application and industries. It offer engineering functionalities ranging from fast concept design to detailed system or sub system/component analysis,design optimization and root couse investigation.

Applications of GT-Suite in Industries

(1) On highway Vehicle

(2) Off- Highway vehicle

(3) Marine and rail

(4) Industrial Machinery

(5) Aerospace

(6) Power Generation

Multi Physics platform

The foundation of GT-SUITE is a versatile multi physics platform for constructing models of general systems based on many underlying fundamental libraties:

(1) Flow library(Any fluid,gas or liquid or mixture)

(2) Acoustics library (Both linear and non linear)

(3) Thermal libraty(all types of heat Transfer)

(4) Mechanical Library (Kinematics,Multi-body dynamics,Frequency domain)

(5) Electric and Electromagnetic library (Circuit,electromechanical devices)

(6) Chemistry Library (Chemical Kinetics)

(7)Controls library(Signal Processing)

(8) Built-in 3D CFD and 3D FE( thermal and Structural)

Modern Software with Unique Capabilities

• Fusion of 1D and 3D simulation in one tool
• Imports solid models from CAD to create 1D and 3D models
• Performs embedded 3D CFD and 3D FE thermal/structural modelling with all boundary conditions provided by the simulated surrounding complete system

Enterprise-Level Capabilities

• Integration with leading PLM tools and revision control tools (Siemens Team Center, Microsoft Sharepoint, SVN)
• System integration and collaboration tools
• Includes tool-neutral co-simulation platform with FMI support (xLINK)
• Distributed computing
• DOE and optimization

Gt suite:

It contains all GT libraries and capabilities. The ideal choice for full vehicle design and analysis, GT-SUITE offers an all-inclusive package that provides an important cost advantage to users.

Templates in GT suite

GT Power Templates:

GT-suitemp templates

Time control flag:

Time control flag are of two type continous and periodic used according to case setup. For Engine application Time control flag is periodic and for other applications continous option. In max. simulation Duration we define time for which setup will run to get converged solution.

• Periodic: Periodic indicates that the model contains at least one circuit which contains a periodic event (i.e. engine cylinder “cycle”) and therefore requires tracking of results with respect to angle over each cycle. Any model that includes an ' EngineCrankTrain', ' CrankAnalysis' , or ' EngineCrankShaft' part should use the periodic option. Note that the simulation duration for a periodic simulation can be specified in cycles or in time, whichever is most convenient.
• Continuous: Continuous indicates that the simulation includes no periodic event, and therefore has no need to track results with respect to a cyclic angle. This is the typical setting for models that contain only quasi-steady fluid circuits such as coolant or underhood air. The simulation duration for a continuous simulation is typically specified in time.

Time step and solution control:

In the Run setup under the flowcontrol tab the time step and solution control optionis present.

• Name of the ' FlowControlExplicit', ' FlowControlImplicit', or ' FlowControlQS' reference object that can be used to define the numerical parameters for the explicit, implicit, or quasi-steady flow solver, respectively.
• If there are no flow circuits in the model, starting in V2016 Build 2 this attribute may be set to “ign” or left blank (which is a rare exception to the normal requirement in GT-SUITE that all cells must be filled).

• INTEGRATOR/SOLVER TYPE
  • In the flow control Tab>Home Tab > RunSetup >ODE Control the Integrator/Solver Type is present.

• Integrator/solver type used in the time-marching of all ODEs including mechanical, electrical and magnetic libraries. For recommendations based on the application, please see the color-coded table immediately following this text.
• Explicit-Adams-PECE: Explicit Adams-Bashforth-Moulton predictor-corrector integration scheme with variable order accuracy. This integrator is recommended for large non-stiff problems, problems with a high maximum time step which have different scales and real time applications.
• Explicit Runge-Kutta: integration scheme that is 5 th order accurate. This integrator is recommended for non-stiff problem
• Implicit-Trapezoidal: Implicit Trapezoidal integration scheme that is 2 nd order accurate. This integrator is recommended for moderately stiff problems.
• Implicit-H.H.T:Implicit Hilber-Hughes-Taylor integration scheme that is 2 nd order accurate. This integrator is recommended for moderately stiff problems.
• Implicit-Radau2: Implicit 2-stage Radau integration scheme that is 3 rd order accurate. This integrator is recommended for stiff problems.
• Implicit-Radau3: Implicit 3-stage Radau integration scheme that is 5 th order accurate. This integrator is recommended for stiff problems.
• Implicit-S.D.C.3: Implicit 3-stage Spectral Deferred Correction (S.D.C.) integration scheme that is 5 th order accurate. This integrator is recommended for very stiff problems.

• 3.Explore Intercooler tutorial and Note down all the settings:

  • Open the Gt suite and click on Files and then select Tutorials then select Engine Performance and then 6cylDITurbo and then select the intercooler_final.gtm
  • Thus the intercooler set up will pop up on the screen.

  

  • Run Setup
    • In this module all the settings are done according to the results of our Simulation to obtain the exact results.It Contains the different Setups like Time Control,Intialization,Flow Control,ODE Control,Signal Control,Thermal Control,Convergence RLT.
    • Each Settings have a different Attributes to run the simulation.we can go through all this sections detailed in the below images.

  Time Control:

  

  Intialization:

  

  Flow Control:

  

  ODE Control:

  

  SignalControl:

  

  Thermal Control:

  

  ConvergenceRLT:

  

• Advanced Setup
  • Advanced Setup also have the different Attributes and we can go through all this sections detailed in the below images.It Contains the different Setups like General,FLow,Mechanics,Restart,Version Changes,Paths,MiscFiles
  • Each Settings have a different Attributes to run the simulation.we can go through all this sections detailed in the below images.

General

Flow

Mechanics:

Restart:

Version Changes:

Paths:

MiscFiles:

• Plot Setup

Cycle and/or time plots may be requested by selecting the appropriate plot from the "Plot Options" folder within each part. Each of these requests will result in a plot being stored. (This is not true when the specific plot requires a certain modeling option to be used in order to calculate the results that are to be presented in the plot. For example, plots of the pipe wall temperature versus radius will be made only when the wall temperature solver is used in the model.

Plot Setup, which is found under the "Run" pull-down menu, gives the user a variety of options to change the way in which the plots are requested. If no changes are requested, the Default Values, as specified in the top right corner of the Plot Setup Dialog, will be used. A button called "Remove Plot(s)" is available to remove unwanted plot requests from Plot Setup. All plots requested in individual parts will be stored regardless of whether the user chooses to use Plot Setup.

• • GT_Post processing data can be done it is used for the accesing the data from the results.It Contains the different Setups like Data_Storage,General,GT_POST_Setup,Flow,ODE_Mech,ScoreboardRLTs,UserScoreboardRLTs,EndOfRunTables.
  • Each Settings have a different Attributes to run the simulation.we can go through all this sections detailed in the below images.

Data_Storage:

General:

GT_POST_Setup:

Flow:

ODE_Mech:

ScoreboardRLTs:

UserboardRLTs:

EndofRunTables:

4.Inter Cooler Problem:

• Open the Inter-Cooler tutorial by opening through the following steps.
• File > Tutorials>Engine Performance>06-6cylDITurbo>intercooler_final.gtm

Results:

Change to PLT contour map and select Thermal from the template.

The total heat transfer is 7.5539484 Kw

Change to pressure template to find the pressure drop

The pressure drop is 1.1233449E-5 bar

Conclusions:

• Thus the GUI of GT Suite format is being explained
• Locations of the different setups is found.
• Elaboration of the different setups is done and explained them.
• For the Intercooler Engine the Temperature and Pressure Drop has been computed.