Русский

Physico-chemical processes and materials in space conditions


Experiment Electric Flame


Objective:

Obtaining high-precision experimental data for studying the effect of electric fields on diffusion flame.

Tasks:

  • Experimental study of the properties of diffusion flame of methane and ethane exposed to electrostatic field and transient process in response to changes in the electric field under microgravity conditions. Obtaining data about the shape of the flame, its temperature, soot formation and the limits of its existence depending on the flow rate, the mixture dilution and the strength of the electric field.
  • Development of procedures for analyzing experimental data on the basis of theoretical calculations of characteristics and structure of the diffusion flame in electric field under microgravity conditions and comparing analytical data with those obtained in the course of the space experiment.
  • Providing scientifically proven recommendations on changing the modes of carrying out the space experiment.
  • Obtaining and processing experimental data, solving a number of inverse problems to extract kinetic data for models of diffusion flame in electric field taking into account ionic wind, chemi-ionization and other factors under microgravity conditions.

Equipment for the experiment:

  • a chamber with two orthogonal optical windows,
  • a burner made up of two coaxial pipes,
  • ignition system,
  • gas feed and disposal system,
  • measuring instrumentation (optical and UV-cameras, radiometer, pressure and acceleration sensors, thermocouples, laser extinction and pyrometry unit, gas chromatograph),
  • control unit,
  • data processing and storage unit.

Experiment results:

  • video information with the images of the diffusion flame in the optical and UV bands;
  • radiant flux values both in the wide and the narrow spectral bands;
  • accompanying data: pressure in the chamber, temperature, gas composition.

Expected results:

Characteristics of diffusion flame in the concurrent air flow will be obtained for both highly diluted compositions and under soot-forming conditions depending on the inlet gas velocity and mixture dilution. The results of these experiments will be directly applicable to practical issues related to turbulent combustion, ignition, flame stabilization and many others.