Radiative heat load, generated by heat combustion products, might be important for structural design and sensitive issues as radar observability and infrared signature. Therefore, accurate estimation of the radiative heat load, generated by the plume and the nozzle, on the structure of the rocket is mandatory. Researching on this topic keeps from 2003 due to several National and International Research Projects, in particular for the VEGA launch Vehiclein collaborations with international Companies and Industries and with National and International Institutions.

cmc-vulcain-subscale-nozzle-extension

 

In particular the radiative effects, of the P80 and Avum plumes (solid and liquid engines), at specific altitudes, on the rocket structure were analyzed.

Two main difficulties characterize this investigation:

  • the P80 solid particles
  • the Avum operating altitude, which is distinguished by a free molecular flow regime