Central Research Institute
for Machine Building
EN RU

Zarevo

Zarevo

Programms

Cipher of the experiment: Zarevo
Direction of the NPI: 1. Physical and Chemical Processes and Materials in Space Environment
Section CNTS: Space Material Science
Name of experiment: 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.
Purpose of the experiment: 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:
    1. n-dodecane;
    2. 2,6,10-trimethyldodecane;
    3. 2,2,4,6,6-pentamethylheptane.

Scientific equipment: 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.
Expected results:
  • 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.
Experiment state: Accomplished