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Quasi-Detonation in Semi-Closed Encumbered Space

6 Quasi-Detonation in Semi-Closed Encumbered Space [Pg.107]

Due to the low density of H2, an accidental hydrogen emission creates a high probability of forming highly explosive volumes in the upper part of a confined or semi-confined space. A characteristic of the near-ceiling HAM volumes is a free region in the combustible bay basement and, probably, along the sides of a gas-polluted space. [Pg.107]

Besides, devices providing operation conditions for personnel and equipment are normally installed in the near ceiling space. For the purposes of HAM layer combustion investigation under such specific conditions, large-scale facilities and model sets have been made [27]. [Pg.107]

The layout of a large-scale test arrangement is presented in Fig. 5.19. The channel length is 5.7 m. The channel width is 1.6 m. Three values of the HAM layer height were used H = 0.60 m at the channel volume - 5.47 m, // = 0.30 m at the channel volume - 2.74 m and // = 0.15 m at the channel volume - 1.37 m. In some tests the channel cross -section was blocked by wooden grids with BR = 0.6. The distance between the grids was 0.5 m. A non-accelerating combustion velocity of about 33 m/s was recorded in the unencumbered layer. In the encumbered layer the blast processes illustrated in Fig. 5.20 were revealed. [Pg.108]




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