Physico-chemical processes and materials in space conditions
Obtaining the initial data to develop a model of hydrocarbon fuel combustion in microgravity in order to create a fire safety system in the pressurized compartments of spacecraft.
- Experimental study of the process of cold-flame combustion of individual droplets of hydrocarbon fuels (n-dodecane, 2,6, 10-trimethyldodecane and 2,2,4,6,6-pentamethylheptane) in microgravity.
- Development of the express-analysis procedure of experimental data based on design-theoretical studies of cold-flame combustion of a large n-heptane droplet in the air at 1 atmosphere and comparison of the obtained results with experimental data.
- Issue of science-based recommendations on changing the space experiment execution modes.
- Obtaining experimental data for the development and verification of detailed, simplified and global kinetic mechanisms of oxidation and combustion of the following hydrocarbons:
Used Science Hardware:
Science hardware CIR (Multifunctional module for combustion study) containing a 100-litre chamber with the equipment allowing to change the gas atmosphere composition, as well as the MDCA unit built-in to study the droplet combustion. In the unit there are fuel tanks and pipes and also needles and mechanical drives for the generation of droplets. For the droplet ignition two sets of electrodes disposed diametrically opposite in the vicinity of the droplet are used. After the ignition these electrodes are removed. The installation is outfitted with the optical recording equipment providing the droplet video observation and its surrounding flame in different frequency ranges and also with sensors recording pressure, temperature and the gas composition in the chamber.
- videodata with the droplet image;
- videodata with the image of a hot flame (via CH-filters) and a cold flame (via a broadband formaldehyde filter);
- videodata with the image of the droplet and supporting fiber in the infrared range;
- values of the radiation fluxes both in the wide and narrow spectral ranges;
- accompanying data: chamber pressure, temperature, gas composition and others.