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Study of explosion propagation in elongated closed vessels Duration: 01.05.2013 – 30.04.2015

Study of explosion propagation in elongated closed vessels Duration: 01.05.2013 – 30.04.2015. P ostdoctoral Research Project PN-II-RU-PD-2012-3-0035 Contract No. 17/26.04.2013. D irector of Project : Dr. Codina Movileanu. Mentor of Project : Dr. D omnina Razus. Project Budget:.

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Study of explosion propagation in elongated closed vessels Duration: 01.05.2013 – 30.04.2015

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  1. Study of explosion propagation in elongated closed vesselsDuration: 01.05.2013 – 30.04.2015 Postdoctoral Research Project PN-II-RU-PD-2012-3-0035 Contract No. 17/26.04.2013 Director of Project: Dr. Codina Movileanu Mentor of Project: Dr. Domnina Razus

  2. Project Budget:

  3. Project Summary: The main objective of this project is the experimental investigation of closed-vessel explosive combustion of fuel-air mixtures, in deflagration regime, in elongated cylindrical vessels (length/diameter > 3) in order to reveal the heat losses during flame propagation and to evaluate their impact on the flammability parameters. In these vessels, both central and side ignitions will be performed. The study will be realized with ethylene-air mixtures at various initial concentrations and various initial pressures, at ambient initial temperature. The objectives of the project are: (1) The experimental determination of the maximum explosion pressures and explosion times for ethylene-air mixtures at various p0 in elongated cylindrical vessels with various L/D ratios; (2)The calculation of adiabatic explosion pressures for fuel-air mixtures within the flammability range at ambient p0, using available computer packages; (3) The calculation of the maximum rates of pressure rise for fuel-air mixtures with various equivalence ratios at various p0 in elongated cylindrical vessels; (4) The experimental determination of the propagation velocity for deflagrations of ethylene-air mixtures at various initial pressures in elongated cylindrical vessels. The knowledge of characteristic parameters of these processes allows the assessment of explosion risks for flammable mixtures in various conditions and the design of equipment and industrial plants where flammable mixtures might be formed.

  4. Project Objectivs: 1. Experimental measurement of flammability parameters for stoichiometric ethylene-air mixtures in three asymmetrical closed vessels with central ignition at ambient p0 and T0 2. Examination of maximum explosion pressures and of times to reach the maximum pressure as a function of asymmetry ratio R=L/D 3. Calculation of the maximum rates of pressure rise and propagation velocities from pressure-time history and examination of their variation as a function of the asymmetry ratio 4. Experimental measurement of flammability parameters for stoichiometric ethylene-air mixtures in 3 asymmetrical closed vessels with central ignition at ambient T0 and various initial pressures 5. Computation of adiabatic flammability parameters

  5. Experimental set-up:

  6. Dissemination of project results: 1. C. Movileanu, D. Razus and V. Gosa,Explosion of gaseous ethylene-air mixtures in closed cylindrical vessels with asymmetrical ignition, International Conference of Physical Chemistry - ROMPHYSCHEM 15th edition: September 11-13, 2013, Bucharest, Romania (Poster); 2. Codina Movileanu , Venera Giurcan, Domnina Razus and Vasile Gosa, Flame propagation in elongated cylindrical vessels with asymmetrical ignition, Eighth Mediterranean Combustion Symposium, September 8-13, 2013 Çesme, İzmir, Turkey (Poster); 3. C. Movileanu, D. Razus, V.Giurcan and V. Gosa, Explosion parameters of gaseous ethylene-air mixtures in elongated cylindrical vessels, PRIOCHEM IX – 24-25 oct. 2013, Bucharest, Romania (Oral communication);

  7. Training of the Project Director: 1. “2013 Princeton Combustion Summer School”, Princeton University, NJ, USA, June 2013. 2.“The Combustion Institute Summer School 2013”, Lund University, Lund Sweden, Aug. 2013.

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