1. for the spatio-temporal characterization of flamelet dynamics, with the aid of laser diagnostics or probe techniques [7-10]. In this context, laser induced one-point Rayleigh scattering has been intensively used to determine the characteristics of the instantaneous density (or temperature) field in laboratory turbulent premixed flames withdifferent configurations [4-6,11,12]. Many parameters, relevantformodeling purposes, havebeen deduced from these measurements. They concern the reaction progress variable, the flame crossing frequency, the characteristic flamelet passage and transit times, and also estimates forthe mean reaction rate and the flame surface density [4,5]. These measurements are however mostly confined to onepoint statistics, and therefore, only temporal averages ortimescales havebeendetermined.
2. 3-0.5