Ümit Özgür Köylü

TL;DR: In this paper, the structure of soot aggregates was investigated, emphasizing the fractal properties as well as the relationships between the properties of actual and projected soot images. And the authors found that soot aggregate fractal property is relatively independent of fuel type and flame condition, yielding a fractal dimension of 1.82 with experimental uncertainties of 0.08 and 0.5, respectively.

TL;DR: In this paper, the structure of soot was investigated within the fuel-lean (overfire) region of overventilated buoyant turbulent diffusion flames burning in still air, and the results showed that the structure varies with fuel type but is relatively independent of both position in the overfire region and flame residence time for the long residence time regime.

TL;DR: In this article, a thermocouple particle densitometry (TPD) was used for measuring absolute soot volume fraction in flames. But the TPD method is not applicable to the upper regions of these co-flowing flames since OH concentrations there suffice to rapidly oxidize any soot particles that deposit.

TL;DR: In this article, a new particle volume fraction measurement technique was developed using electron microscope analysis of thermophoretically sampled particles/aggregates based on a theoretical treatment of particle deposition to a cold surface immersed in a flame.

TL;DR: The results suggested that the RDG-FA theory is a reasonable approximation for optics of a wide range of fractal aggregates, considerably extending its domain of applicability.