Week-6 : Turbocharger Modelling

Solution: Turbocharging Model:

Question:

• List down different TC and locate examples from GT Power
• Explore tutorial number 6 and 7
• Plot operating points on compressor and turbine maps
• In which application Variable Geometry Turbine is beneficial?
• Explore example- Diesel VGT EGR and understand the modeling part

Answer:

A. Different Turbochargers and Examples in GT Power:

B. Explore: Tutorial 6 & 7

Week 6 : 6cylDI-final (Location: Tutorials--> Modeling_Applications --> Engine_Performance --> 06 - 6cylDIturbo --> 6cylDI-final)

Week 7 : Turbo_Step5-final (Location: Tutorials--> Modeling_Applications --> Engine_Performance --> 07 - Turbocharging --> Turbo_Step5-final)

C. Plot operating points on compressor and turbine maps

Turbocharging model - 5 step model was simulated. Case setup and results are as follow.

Engine Performance for 3 different altitude (0, 3000 & 5000 meters) cases was studied.

Compressor & Turbine Maps:

Case 1: Altitude 0 m

Case 2: Altitude 3000 m

Case 3: Altitude 5000 m

D. In which application Variable Geometry Turbine is beneficial?

The variable geometry turbine allows significant flexibility over the pressure ratio across the turbine. In diesel engines, this flexibility can be used for improving low speed torque characteristics, reducing turbocharger lag and driving EGR flow. The most common designs of variable geometry turbochargers include the pivoting vane design and the moving wall design.

E. Example- Diesel VGT EGR and understand the modeling part