The first set of experiments is dedicated to first-class and original science of very broad interest for the world-wide scientific community in the field of near-ambient and high-temperature critical fluids and in the field of material sciences. This research includes for example combustion in supercritical water and the solidification of lamellar eutecticsand is an extension of the programme conducted on board the MIR space station and the Space Shuttle.
This High Temperature Insert is dedicated to the study of forced piston effect in H2O and coupling phenomena between chemical reactions and hydrodynamics in highly compressible supercritical fluids.
The scientific objectives are: study of the heat and mass transfer in near-critical water submitted to pulse heating and/or mechanical quenching, with observation of the critical behaviour of water.
The experiment will necessitate critical temperature (Tc) search and balancing steps with measurement of temperature and density gradient relaxation.
This experiment has led to the study of new technological issues linked to high temperature and use of high pressure.
The design is intended to withstand temperatures up to 600°C and high pressure up to 500 bars. The sample cell body and the corresponding optical windows are submitted to an aggressive environment that must to be closely controlled. Recent achievements have evidenced the technical difficulties in this high-temperature, high-pressure experimental cell, observed through a wide transmission diameter (around 12 mm), designed taking into account a reduced volume and NASA safety constraints.