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Abstract

The present research contract, carried out in the framework of a French working group CEA-EDF-ENSMA, was divided into four phases: 1) Phase 1: Scaling effects on a pressure field generated by spontaneous accelerations of deflagrations in a homogeneous medium : these "CHARLES" tests performed on completely unconfined charges of ethylene-air and acetylene-air mixtures (V approximately equal to 12m3) have demonstrated the high sensitivity of the pressure field to the flame acceleration, particularly at the end of the propagation. 2) Phase 2: Effect of a sudden discontinuity in the concentration of the combustible gas on the deflagration speed in a heterogeneous medium : this discontinuity was obtained using two concentric latex balloons, filled with different hydrocarbon concentrations and also destroyed before firing. 3) Phase 3: Study of pseudo-detonation modes for the explosion of spherical ethylene-air mixtures : these modes were sought by increasing an explosive plastic mass associated to the igniter. 4) Phase 4: Study of the influence of cloud shape and ignition point location on the pressure field generated by the explosion. A retractable enclosure was designed, built and unfortunately destroyed by the second test.

Additional information

Authors: BROSSARD J, UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.);DESBORDES D, UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.);LEYER J C, UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.);SAINT CLOUD J P, UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.);DI FABIO N, UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.);GARNIER J L, UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.);LANNOY A, UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.);PERROT J UNIV. DE BOURGES-ORLEANS, UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.);UNIV. DE POITIERS, UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.);EDF- DIR. DE L'EQUIPEMENT, UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.);CEA-DEPT D'ANALYSE DE SURETE,PARIS, UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.);EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. , UNIV. DE BOURGES-ORLEANS;UNIV. DE POITIERS;EDF- DIR. DE L'EQUIPEMENT;CEA-DEPT D'ANALYSE DE SURETE,PARIS;EDF-DIR. DES ETUDES ET RECH. CEA-CEN. D'ETUDES SC. ET TECH. D'AQUITAINE (FR.)
Bibliographic Reference: EUR 9679 FR (1985) MF, 80 P., BFR 150, BLOW-UP COPY BFR 400, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
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