The heat flux temperature and density on a heat emitting calorimeter surface are defined from an incorrect inverse heat conductivity problem, a software complex applied to solve an inverse heat conductivity problem and thermocouple measurement results.

Gas-droplet flows are tested at droplet velocity of 5 through 150 m/s and diameters of more than 5 mcm under surface temperatures of up to 12500C and heat flux densities of up to 20 MW/m².


Photo of liquid atomization by means of pneumatic nozzle ( exposure = 5 ns)

Droplet velocities are determined by means of a special laser correlation velocity sensor (LKDC-1) within the range of 0.5 to 200 m/c.

In addition to temperature measurements by means of thermocouples the heat emitting surface temperature is remotely measured by FLIR System Thermocam S60 IR Camera.




To visualize a gas-droplet flow structure a SOLO IV impulse laser with an impulse duration of 5ns CANON EOS 300D Camera are used. The results of flow photographing to measure droplet sizes are processed by a special software complex. To measure droplet sizes in the range of up to 1000 mcm the MALVERN laser-optical instrument is also used.

A computerized test system on the basis of VME and 2 PCs provides physical parameter measurement and the test bench operation control.


General view of a test rig for laser correlation velocity sensor calibration





Results of in-jet droplet flow velocity measurement by means of laser correlation velocity sensor:


Test bench for cooling ability investigation of fire fighting systems



Test portion area at the moment of gas-droplet jet injection::



Test sample temperature measurement results by IR camera during fire suppression


Temperature field measurement results on the test sample surface by IR camera at the gas-and-droplet jet delivery shut-off: