The Vulcain 2 engine is an upgraded version of the main engine for the Ariane 5 rocket, developing more thrust and allowing more Isp. The engine features a bigger nozzle with a film cooled skirt as well as more powerful LOX and LH2 turbines.
We are a part of the European team of companies that is developing and producing the Vulcain 2 rocket engine. We supply several of the engine's key parts, such as the hydrogen turbines and the oxygen turbines as well as the hydrogen cooled nozzle. We have been involved in the Vulcain 2 program since its beginning in the early 1990's .
Vulcain 2 produces 30% more thrust than its predecessor. The LOX turbine for the Vulcain 2 is an upgraded version with a more powerful configuration. It is a 2-stage transonic turbine that operates at speeds similar to those of its predecessor, but at higher pressure and flow rate to develop more power. The LH2 turbine is a 2-stage transonic turbine that powers the liquid hydrogen pump of the Vulcain engine of the Ariane 5 launch vehicle. As a GG-cycle engine, the Vulcain uses hydrogen-rich gases to power its turbines. For Vulcain 2, the LH2 turbine is of similar configuration but develops more power, operating at higher speed and pressure.