Homogenous charge compression ignition (HCCI) combustion is spontaneous multi-site combustion of a nominally premixed air/fuel mixture that exhibits high rate of pressure rise and short combustion duration. To avoid excessive pressure rise rate and knocking, HCCI engines are fueled with highly diluted mixture using a combination of excess air and/or EGR. HCCI combustion is attractive due to ...

Using the high-resolution experimental spectral absorption coefficients of six fuel gases and line by spectra CO CH4 based on HITRAN HITEMP databases, in this paper, novel for weighted-sum-of-gray-gases (WSGG) model are presented Heptane, Methane, Methanol, MMA, Propane, Propylene, Toluene, CO. Moreover, soot, were calculated assuming Rayleigh regime implementing complex index refraction obtain...

The effect of steady strain on the transient autoignition of n-heptane at high pressures is studied numerically with detailed chemistry and transport in a counterflow configuration. Skeletal and reduced n-heptane mechanisms are developed and validated against experiments over a range of pressure and stoichiometries. Two configurations are investigated using the skeletal mechanism. First, the ef...

PURPOSE To evaluate the effect of Lamium album extract on human corneal epithelial cells (10.014 pRSV-T cell line) cultured in vitro. METHODS Normal human corneal epithelial cells were incubated with ethanol, ethyl acetate and heptane extracts from Lamium album. Their effect on cells was evaluated by neutral red (NR) uptake and MTT assays for cytotoxicity, ELISA for immunomodulation, Griess m...

Objective: This study evaluated the effect of food-simulating media associated with brushing and coffee staining on color stability of different composite resins. Materials and methods: Eighty specimens were prepared for each composite: Grandio SO (Voco), Amaris (Voco), Filtek Z350XT (3M/ESPE), Filtek P90 (3M/ESPE). They were divided into four groups according to food-simulating media for 7 day...