Defining a Fireball Scenario

Under the Standalones node, insert a Fireball Scenario and name it Fireball under flame impingement.

Open the input dialog for the Fireball Scenario and set the data as follows:

The Burst pressure is 60% greater than the normal operating pressure and is used in calculating the surface emissive power of the fireball.

Note: the Fireball tab section gives you the choice between using a correlation to obtain the radius, duration and emissive power, or entering your own values. For this Scenario, you are taking the default settings and using the correlation.

Running the calculations and viewing the results

Run the calculations for the Tank wagons folder, move to the Weathers tab, select the 1.5/F Weather and view the Graphs for all the Tank wagons Scenarios.

In the Fireball Graphs, you will see that the Fireball Scenario gives slightly larger effect distances than the Catastrophic rupture Scenario, with a distance of about 514 m to 4 kW/m2 compared with 492 m. This shows the effect of the higher vessel pressure used in the Fireball Scenario to model failure under flame impingement, whereas the Catastrophic rupture Scenario considers a rupture under normal operating conditions which then has a probability of igniting immediately and giving fireball effects.

Saving the workspace

You have now completed the tutorial, and you should save the workspace in order to save the changes you have made.