Mr. Belmont et al., METHODS FOR EXAMINING ANISOTROPIES IN EARLY COMBUSTION .1. MULTISCALEEXPERIMENTAL DETERMINATIONS, Combustion science and technology, 108(1-3), 1995, pp. 149-173
Experimental measures are developed for the description of anisotropic
growth in the early stages of the flame kernel development in an oper
ating spark ignition internal combustion engine. These measures are de
velopments of the support area concept introduced by Bradley and Abdel
-Gayed. By applying the technique of multi-scale analysis derived from
texture analysis to such anisotropy measures it has shown to be possi
ble to obtain time dependent information about the effect of the vario
us local length scales in the processes that influence early flame gro
wth. The analysis techniques employed are demonstrated to offer very w
ide scope for characterising anisotropic time varying combustion and t
he basis is laid for a formal development of this topic as presented i
n the companion paper. An interesting observation is that for cycles o
ther than partial combustions the largest length scale of process effe
cting the flame kernel on tends to increase with time during the early
flame growth.