Blast wave interactions with burning cloud of fuel sprays

• Autorzy: Kuznetsov M.S. , Dorofeev S.B. , Alekseev V.I. , Abyzov M.M.
• Języki publikacji: EN

Abstrakty

EN

Experimental results on the interaction between blast wave and burning cloud of fuel spray in air are presented. The objective of the work was to study evoluation of blast wave parameters as a result of pressure wave interaction with burning heterogeneous fuel-air cloud. Experiments have been performed with gasoline (B 70), kerosene (Jet A), and diesel fuel. Unconfined clouds were produced by the liquid fuel dispersing through split nozzles mounted on the horizontal tube. Amount of a fuel was about 100-110 kg in the testes. Aerosol clouds had semi cylindrical shape and their volume was about 1000 m3 (up to 7.5 m in radius, 15-20 m in length). Spray clouds were ignited by a distributed ignition source (an elastic HE charge of 16 m in length) located along the cloud on the height of 1.5 m above the ground. Blast wave was generated by a HE charge (0.35-10 kg), located outside the cloud. Time delay between the cloud ignition moment and the external blast wave initiation was varied from 0.02 to 1.0 s. Piezoelectric pressure transducers were used to record shock propagation. Pressure transducers were placed along two perpendicular directions from the HE charge. Blast wave overpressure and impulse as functions of distance from explosion origin were studied in cases with and without influence of burning cloud. It was found out that interaction of the air blast wave with the burning cloud is able to change parameters of the blast wave significantly. In addition to decreased decay rate of blast intensity with distance, amplification of intensity of the blast wave inside the clouds was observed. The effect of amplification was found to be very sensitive to the time delay between cloud ignition and blast-cloud interaction, and to the fuel type. Possibility of blast wave parameters changes due to interactions with burning clouds may be important for analyses of the blast effect of accidental explosions.

• Wydawca: Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archivum Combustionis
• Rocznik: 1998
• Tom: Vol. 18 nr 1-4
• Strony: 7--20
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Kuznetsov M.S.

autor

Dorofeev S.B.

autor

Alekseev V.I.

autor

Abyzov M.M.

• RRC 'Kurchatov Institute' Moscow, Russia