Week 4: Project - Steady state simulation of flow over a throttle body

Aim: To Study the Steady state simulation of flow over throttle body.

Software used: Converge CFD

Theory:

The throttle valve used in IC Engines, it is a circular disc placed near to the intake manifold which controls the mass flow rate of air fuel mixture entering the combustion chamber.

In a petrol engine, the throttle valve impacts the quantity of air that is drawn in. More or less fresh air or air-fuel mixture flows into the cylinder according to how open the valve is. The position of the throttle valve directly determines the performance of the engine.

Geometry in Converge CFD:

Case Setup:

Application type:

Materials : Air

Simulation Parameters:

Run Parameters:

Steady State Monitor:

Simulation time parameters:

Solver Parameters:

Boundary Conditions:

Inlet:

Outlet:

Outerwall:

Throttle wall:

Intial conditions:

Physical Models:

Turbulence model- RANS

Grid Control:

Base Grid:

Fixed embedding:

Mesh:

Contours:

Velocity:

Pressure:

Vectors:

Plots:

Pressure at inlet:

Pressure at outlet:

Velocity:

Mass Flow rate:

Total cell count:

Observations:

The Fixed emedding created a fine mesh near the Throttle body. that will help to capture the smooth plots near the throttle body.

The total number of cells isnot changed because mesh embedding is permanent.

In the velocity profile wake region is formed.

In the low pressure wake region is shown.