Agile Space Industries designs, manufactures, and tests in-
space chemical propulsion systems that operate on hypergolic 
propellants. Hypergols spontaneously ignite when they come 
into contact with each other without the need for an external 
ignition source. Wind restrictions for hypergolic engine 
testing are determined by atmospheric dispersion models, 
which predict the ground concentration of toxic vapors in the 
atmosphere in case of an accidental release. Test stand 
altitude systems employ motive gases that are released with 
the engine exhaust. Most dispersion models do not account for 
the momentum imparted by the motive gas into the toxic vapor 
flow, which results in overly conservative wind restrictions 
for testing. In this webinar, Gayathri Shivkumar, Senior 
Principal Propulsion Engineer at Agile, will demonstrate how 
they apply CFD modeling to predict atmospheric plume 
dispersion more realistically. CFD allows Agile to analyze 
the impact of the motive gas flow on the vapor distribution 
and to determine the plume characteristics generated by 
aerosol liquids.