Experimental setup

Combustible materials: metals (Mg, Al, B, Ti, Zr, Zn and other), coal (including high-ash coal), fuel-water emulsions, organic solid and liquid fuels, low-grade fuels and combustible waste.

Diagnostic methods: optical, electrical, gravimetric, x-ray analysis, electron microscopy.

Directions:

  1. Energetical combustion.

Ignition and combustion of disperse systems – single particles (biofuel blends single droplets or gas-suspensions), dusts and porous systems.

  1. Gas dynamics of combustion.

Flame propagation in dispersed systems.

Stability and structure of combustion wave, laminar, vibrating and turbulent flames in two-phase systems (aerosols and dusts).

Limits of flame propagation.

  1. Technological combustion.

Self-propagating high-temperature synthesis (SHS) of luminophors (ZnS, CdS for example), intermetallic compounds (Ti3Al, Ni3Al for example), ultra-hard materials (TiC и WC for example), and molybdenum disulfide as an example of the most effective artificial solid lubricant.

Gas-disperse synthesis (GDS) of nano- and ultrafine powders of metal oxides (Al2O3, ZrO2, TiO2, Fe2O3, MgO, ZnO) in specially organized laminar two-phase flames.

  1. Ecological problems in combustion.

These problems are decided along with the problems of energetical combustion and are directed on elaboration of physical bases of fire and explosion hazards prevention; optimization of combustion processes for different fuels, reduction of hazardous emissions and utilization of the combustible waste.

Our team

2 professors, 4 PhD, 9 post-graduates, scientists and engineers.

 

Experimental setups:

  1. Constant volume vessel (V = 4,1l) – Hartman apparatus analog.

Object of study: fine dispersed solid fuels/oxydizing gas mixtures (including hybrid mixtures with combustible gas) ignition and combustion in air or oxygen containing controlled environments.

Available parameters to define:

  • Pressure-time histories of fuel/oxidizer mixtures combustion or explosion;
  • rates of pressure increase;
  • average and maximum pressure increasing rates;
  • maximum explosion pressure;
  • combustion products temperature;
  • definition of minimal ignition energy;
  • upper and lower flame propagation (explosion) limits for combustible dusts.

  1. Constant pressure vessel.

Object of study: laminar flame propagation in conditions of small volume fine dispersed solid combustible dust clouds in oxydizing (air or oxygen containing) gases environments (including combustible gas/oxidizing gas hybrid mixtures).

Available parameters to define:

  • upper and lower laminar flame propagation limits;
  • radiative characteristics for burning clouds;
  • definition of minimal ignition energy (for free clouds conditions);
  • dependency of flame propagation speed on combustible dust and oxidizing gas properties and concentration.

 

Flash point apparatus

Object of study: liquid fuels (materials with flammable vapors) ignition process depending on material type and temperature.

Available parameters to define:

  • flash point temperature for different materials;

 

  1. Vertical tube experimental setup for flame propagation studies.

Object of study: gas or fine dispersed combustible dust-oxidizing gas suspensions flame propagation process along or against the gravity vector;

limits and conditions for flame propagation transitional regimes (from laminar to vibration and turbulent combustion).

Available parameters to define:

  • lower laminar flame propagation (explosion) limit;
  • laminar flame velocity/normal flame speed dependency on fuel dust and oxidizing gas properties.

  1. Preheated fuel mixture dust burner for low-energy fuels study.

Object of study: low-grade solid fuels and combustible waste burning regularities in a premixed laminar dust flame.

Available parameters to define:

  • low-grade solid fuels and flammable waste burning conditions;
  • flame length and structure dependency from fuel and oxidizing gas parameters;
  • combustion mass rate depending on fuel and oxidizing gas parameters.

  1. Flammable dusts self/auto-ignition experimental apparatus (unit, assembly) – Godbert-Greenwald furnace

Object of study: fine dispersed combustible dust particles-gas mixtures ignition and auto-ignition (including low-grade solid fuels and combustible waste) in the air or other oxygen containing environment.

Available parameters to define:

  • ignition delay time dependency on solid fuel and oxidizing gas parameters.
  • Minimum ignition and auto-ignition temperature dependency on solid fuel and oxidizing gas parameters;

  1. Individual particles and agglomerates ignition experimental setup.

Object of study: single particles and agglomerate of fuel particles ignition and auto-ignition (including low-energy solid fuels and combustible waste) in air or other oxygen containing environments.

Available parameters to define:

  • Minimum ignition and auto-ignition temperature dependency on solid fuel and oxidizing gas parameters;
  • Ignition/auto-ignition delay time dependency on solid fuel and oxidizing gas parameters.

  1. Liquid fuel droplets ignition and combustion experimental setup.

Object of study: single liquid fuel droplets ignition and auto-ignition (including liquid biofuels and their mixtures with liquid mineral fuels) in air and other oxygen containing environments;

Available parameters to define:

  • Minimum ignition and auto-ignition temperature dependency from liquid fuel and oxidizing gas parameters;
  • Ignition delay time dependency on liquid fuel (biofuel) and oxidizing gas parameters;
  • Effective energy value determination via ignition critical conditions of biofuel blends;
  • Liquid biofuel combustion rate constant effective value determination;
  • Determination of liquid fuel (biofuel) burning rate constant;
  • Liquid droplet burning time dependency on fuel (biofuel) and oxidizing gas parameters.

 

  1. Liquid fuel droplet combustion experimental setup with equivalence ratio variation.

Object of study: liquid fuels droplet combustion (including liquid biofuels and their blends with liquid mineral fuels).

Available parameters to define:

  • Combustion zone structure and temperature dependency on equivalence ratio value;
  • Ignition delay time dependency from liquid fuel and oxidizing gas parameters;
  • Liquid droplet burning time dependency from equivalence ratio value, fuel and oxidizing gas parameters.

 

  1. Self-propagating high-temperature synthesis experimental setup (SHS-reactor).

Object of study: self-propagation high temperature synthesis of target products.

Available parameters to define:

  • Combustion wave propagation velocity in solid fuel/solid oxidant system depending on mixture proportions, temperature and pressure in reactor;
  • Combustion temperature and combustion zone width dependency on initial charge composition, temperature and pressure in reactor.

Obtained target products phase and structural composition investigated by scanning electron microscopy and x-ray phase analysis.

  1. Nano- and ultrafine metal oxides powders gas-disperse synthesis unit (GDS-unit).

Object of study: metal particles-gas mixtures combustion in dust burner conditions and combustion products physical properties controlling methods.

Available parameters to define:

  • flame speed dependency on fuel dust and oxidizing gas properties;
  • flame length and structure dependency on fuel and oxidizing gas parameters;
  • metal dust flame irradiative characteristics;
  • premixed and diffusion dust flames concentration limits (in burner conditions).

Furthermore, this experimental setup allows to synthesis sufficient amounts (up to 1kg per hour) of different nano- or ultrafine metal oxide powders.

  1. Thermo-gravimetric apparatus.

Object of study:  liquid fuel droplet evaporation process’s and solid fuel particles/agglomerates oxidation and/or volatilization process’s kinetics.

Available parameters to define:

  • continuous precision control of solid particle or liquid droplet mass consumption rate in air or oxygen-rich environment;
  • mass consumption time history of solid particle or liquid droplet;
  • solid particle or liquid droplet mass consumption rate by evaporation or volatilization depending on temperature and gas environment composition.
  • liquid or solid fuel particle/droplet global law’s pre-exponential factor and activation energy values for the evaporation, gasification and / or chemical reaction same to Arrhenius law.

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