FURTHER EXPERIMENTS WITH WOOD BLOCK RADIOMETERS INCLUDING THE RESPONSE TO A SKEWED PULSE OF RADIATION
Heselden, A.J. and Griffiths, L.G., 1969. FURTHER EXPERIMENTS WITH WOOD BLOCK RADIOMETERS INCLUDING THE RESPONSE TO A SKEWED PULSE OF RADIATION. Fire Research Notes747
Wood blocks of the kind used to make measurements at the Flambeau test
fire 760-12-67 have been calibrated using a skewed pulse of radiation
approximating to that measured in similar previous fires. The relation between
damage sustained by the blocks and peak intensity were broadly similar to those
for a constant intensity pulse except that with a skewed pulse having a peak
intensity of about 2 W/cm^2 the behaviour of the block was more variable.
The data obtained at the recent Flambeau fire 760-12-67 have been
re-examined in the light of these new calibrations. The variation of peak
intensity over the fire area was closely similar to that previously obtained
when the incident intensity was assumed to be constant for a period of 20 min.
Correlations were found, as before, between the peak intensities at various
positions in the 'streets' between the fuel piles.
