Increased understanding is needed with respect to soot formation from high pressure diesel sprays as emissions standards become increasingly stringent and require complex methods for its reduction. Understanding soot formation and its spatial distributions is necessary to advance fundamental spray combustion knowledge. Given that the underlying nature of high pressure combusting diesel sprays r...

The emission of solid carbonaceous particulate matter (i.e. soot) is a world-wide problem that effects both human health and global environmental health alike. Although a number of sources contribute to the concentration of soot in the atmosphere, Diesel engines play a significant role. Diesel engines, or direct-injection compression-ignition engines, are the primary power plant for delivering ...

In the present study, a global kinetic model of three-way-catalyst-coated gasoline particulate filters was developed to understand relevant mechanisms taking place both in clean and real soot-loaded filters. The involves reaction rate expressions for CO, C2H4, C7H8 conversion over Pd/CeZr/Al2O3 catalyst, hydrothermally treated at 650 °C. Particularly, new expression proposed ethylene based on d...

We present a detailed set of measurements from a piloted, sooting, turbulent C2H4fueled diffusion flame. Hybrid femtosecond/picosecond coherent anti-Stokes Raman scattering (CARS) is used to monitor temperature and oxygen, while laser-induced incandescence (LII) is applied for imaging of the soot volume fraction in the challenging jet-flame environment at Reynolds number, Re = 20,000. Single-la...

In this article we present a parameter free aggregation model for soot formation. Each soot particle is represented as a fractal aggregate that can be described by its total volume, total surface, and number of hydrogenated sites on its surface. The moments of the joint Probility Density Function (PDF) of these three quantities are solved using the Direct Quadrature Method of Moments (DQMOM). T...

A novel method for soot detection based on SiC MOSFET devices with a dual suspended/ floating gate configuration in a co-fired LTCC package has been investigated. Response to different concentrations of soot was measured through the application of an electric field between the two gate electrodes to attract charged soot onto the sensor surface. Results are promising with ap plication areas from...

In this study, using the lattice Boltzmann method, we simulate soot accumulation in porous media to examine the particle trap in a diesel particulate filter (DPF). The porous media are numerically formed for different inner structure with given porosity. The porous structure similar to the real sample, Ni-Cr metal, can be obtained, where the pressure fields in both cases are almost the same. In...

The technique of laser-induced incandescence (LII) has been used to study non-soot, in particular silver particles. Experiments were based on experience with LII soot measurements and a sensitivity analysis regarding the influence of various parameters. Some experimental modifications, e.g. double laser pulse excitation, have been tested. A major extension of the LII technique consists in measu...

JP-8, a surrogate fuel, and several model compounds were used to produce soot aerosols in a drop-tube furnace with optical access. The soluble organic fractions (SOF) of soot aerosols were studied with GC, GC-MS, and 13C NMR. The residue of each aerosol sample was studied with Raman spectroscopy, ESR, and a recently developed technique used to determine the conductivity and extent of turbostrat...