Mini Project - Flow Through a Flow bench

An air flow bench is a device used for testing the internal aerodynamic qualities of an engine component and is related to the more familiar wind tunnel.

It is used primarily for testing the intake and exhaust ports of cylinder heads of internal combustion engines. It is also used to test the flow capabilities of any component such as air filters, carburetors, manifolds or any other part that is required to flow gas. A flow bench is one of the primary tools of high performance engine builders, and porting cylinder heads would be strictly hit or miss without it.

Typical Flow Bench schematic

Report For the Flowbench

1) Grid Dependency Test -

Meshes with different number of cells were increased for more refinement of the flow structure of the flowbench.Mass Flow rate has been calculated with respect to number of cells with respect to planes such as Nx,Ny,Nz respectively.

GRID DEPENDENCY TEST

Case I Case II Case III Nx 20 40 30 Ny 20 50 40 Nz 20 50 80

2)Mass Flow Rate Vs Valve Lift -

Different mass flow rate has been calculated with respect to different value lifts.Five different value positions were taken for different grid numbers.

Case I

Goal (Delta)	Design Point 1	Design Point 2	Design Point 3	Design Point 4	Design Point 5
D8@[email protected] [m]	0.01	0.02	0.03	0.04	0.05
SG Mass Flow Rate 1 [kg/s]	0.000994591	0.001560611	0.001698104	0.001623885	0.00159681

Case II

Goal (Delta)	Design Point 1	Design Point 2	Design Point 3	Design Point 4	Design Point 5
D8@[email protected] [m]	0.01	0.02	0.03	0.04	0.05
SG Mass Flow Rate 1 [kg/s]	0.001118935	0.001591796	0.001707576	0.001670832	0.001800697

Case III

Goal (Delta)	Design Point 1	Design Point 2	Design Point 3	Design Point 4	Design Point 5
D8@[email protected] [m]	0.01	0.02	0.03	0.04	0.05
SG Mass Flow Rate 1 [kg/s]	0.001093521	0.001608264	0.001926921	0.001829653	0.001914256

Dimensions And Conditions For the flowbench

Cylinder Bore Diameter - 200mm

Inlet Diameter - 40mm

Shell - 3mm

Boss Extrude - 200mm

Fuel Used - Methanol(Gases)

Total Pressure at inlet - 101325 Pa

Static Pressure at Outlet - 90000 Pa

Inlet Velocity - 100m/s

Results

Case I

for Valve Lift = 0.01m

for Valve Lift = 0.02m

for Valve Lift = 0.03m

for Valve Lift = 0.04m

for Valve Lift = 0.05m

Case II

for Valve Lift = 0.01m

for Valve Lift = 0.02m

for Valve Lift = 0.03m

for Valve Lift = 0.04m

for Valve Lift = 0.05m

Case III

for Valve Lift = 0.01m

for Valve Lift = 0.02m

for Valve Lift = 0.03m

for Valve Lift = 0.04m

for Valve Lift = 0.05m