Week-11 : Discretization of 3D intake manifold using GEM-3D

1. Tutorial- single cyl DI add case 2 with discretization length 0.1 mm for intake runner and compare with default case 1

• • Parameters-Torque, BSFC, max cylinder pressure
  • simulation time

ENGINE LAYOUT OR MODEL:

CASE SETUP:

PRESSURE VS CRANK ANGLE PLOT:

MASS FLOW RATE VS CRANK ANGLE PLOT:

PERFORMANCE PARAMETERS:

PARAMETERS:

• TORQUE:

DISCRETIZATION LENGTH 1: 40mm = 96.19 Nm

DISCRETIZATION LENGTH 2 : 0.1 mm = 95.92 Nm

• BSFC:

DISCRETIZATION LENGTH 1: 40mm = 238.24 g/kWh

DISCRETIZATION LENGTH 2 : 0.1 mm = 238.92 g/kWh

• MAX PRESSURE:a

DISCRETIZATION LENGTH 1: 40mm = 117.11 bar

DISCRETIZATION LENGTH 2 : 0.1 mm = 115.18 bar

• SIMULATION TIME:

DISCRETIZATION LENGTH 1: 40mm = 6.35

DISCRETIZATION LENGTH 2 : 0.1 mm = 9480.69

2. Explore tutorial no 2 (GEM3D) - “Building intake manifold from STL model”

INTAKE MANIFOLD MODEL:

GEM 3D NEW MODEL CREATION:

Step 1- Separating Sections by Curves

Step 2- Using the Cutting Plane

Step 3 - Convert shapes into GT power components

Step 4- Adding a Custom Connection

Step5 - Set Value to Forward Discharge Coefficient - Parameter

Step 6 - Add Subassembly connection to Impose Connection Direction

Step 7 - Divide the pipe section with Area Changes

Step 8 - Making Difficult Cuts

Step 9 - Determining Orientation During Conversion

Step10 - Flow Connections

Step11 - Discretize the Model

3D to 1D converted model