[hamedc]

Originally Posted by tmburton

Hamed,

The rate shape you enter in CONVERGE Studio during spray setup is just a way of prescribing the shape of the mass flow rate vs. time profile for your injection event. CONVERGE will shift the x-axis (time or CA) to begin at inject_start_time, scale the x-axis (time or CA) to fit into your specified inject_duration, and scale the y-axis (mass flow rate or velocity) to achieve the required inject_mass.

Best regards,

Tristan

Thank you for your reply.

I have an injector that injects the iso-octane in two stages and at a pressure of 1000 bar.
I used a trapezoidal profile as rate shape and set the axis. however, the spray calculator determined over-predicted value for injection pressure.

I have attached these rate values.

Best regards,
Hamed