Ein wesentlicher Teil der wiederentzündbaren Rakete Ariane 6 besteht die Qualifikationstests
Ein integraler Bestandteil der wiederentzündbaren Oberstufe der Ariane 6-Rakete hat die Qualifikationstests bestanden und wird in Kürze zum Testen in die Oberstufe integriert.
Das Auxiliary Power Unit (APU) der oberen Stufe ist einer der letzten Teile der Rakete, die sich qualifizieren, und wird verwendet, um ihre Tanks unter Druck zu setzen. Die APU ist auch für den Betrieb des kryogenen Flüssigraketenmotors von Vinci unerlässlich, der die wiederentzündbare obere Stufe des Airane 6 versorgt.
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Ariane 6 is the latest in the European series of space launch vehicles and is expected to make its first flight in April 2022. Once the upper stage of Ariane 6 is in orbit, the Vinci engine can be reignited up to five times, enabling it to deliver multiple payloads during one mission and ensuring that the engine safely deorbits.
Ariane 6 is the first reignitable launcher developed by the ArianeGroup for the European Space Agency.
More than 50 tests, representing more than 50 hours of operation, have been conducted on the APU since the beginning of its development.
Once integrated into the upper stage, the APU draws a small quantity of liquid oxygen and hydrogen fuel from the tanks which it heats up by means of a gas generator produced entirely by 3D printing, pressurizes, and then injects back into the tanks.
This process settles the propellants towards the bottom of the tanks to ensure optimal operation of the Vinci engine’s turbopumps. Because the behavior of fluids is significantly affected by weightlessness, the propellants would otherwise tend to disperse throughout the tanks.
The APU can also generate additional thrust on demand. For example, to propel the stage once in orbit, a function that is particularly useful for the separation of satellite “clusters”, a method used for constellation deployment, or to improve the accuracy of final orbital injection.
The next stage of testing for the APU will be conducted once it is integrated into the first complete Ariane 6 upper stage, the purpose-built Hot Firing Model (HFM), which is being preapted at the German Aerospace Center DLR’s dedicated test bench in Lampoldshausen, Germany.
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