Encadrant

JB Blaisot, C. Dumouchel, G. Ribert

Résumé

The REFINE project focuses on the experimental investigation and numerical simulation of real-fluid injection and mixing processes under sub-, trans- and super-critical conditions. The domain of interest is the aerospace science and technology where supercritical fluids are considered as propellants. Indeed, the need for higher efficiency and lower emission levels leads to increased pressure and temperature levels, i.e. reaching supercritical properties of fluids. The objective of REFINE is to build a simple well-controlled test-bench able to study a fluid injection under sub-, trans- and super-critical conditions and to associate numerous experimental and numerical diagnostics to deliver the finest information. An ethane injection will then occur in a 5-liter high-pressure experimental test-bench. The X-ray diagnostics setting-up will be the project keystone, as it has to deliver a non-polluted density measurement. Indeed, such diagnostics are not disrupted by the index gradient observed in corrugated flows, contrary to laser techniques. A classical shadowgraphy technique will be also used. Finally, numerical simulations will be realized in parallel to help to the physics understanding and for code validation.

Mots clés

Atomisation, imagerie X, supercritique, morphologie.