Zobrazeno 1 - 10
of 91
pro vyhledávání: '"P. Durbetaki"'
Publikováno v:
International Journal for Numerical Methods in Fluids. 20:507-522
A numerical model of radiative ignition of pyrolysing solid fuels is developed. The model is one-dimensional and transient. The following mechanisms are simultaneously accounted for. (i) the surface heat and mass transport, (ii) the surface oxidation
Publikováno v:
Combustion and Flame. 94:349-362
A modeling analysis of laser-induced ignition of coals is presented. The model is one dimensional, transient, and incorporates the following: the surface ignition reaction, the in-depth pyrolysis, the gas-phase absorption of the laser radiation and b
Autor:
Xianming Li, P. Durbetaki
Publikováno v:
International Journal for Numerical Methods in Engineering. 35:853-870
The vertical surface of a non-reactive semi-infinite solid is suddenly heated by a radiative heat flux source. The surface temperature increases and a thermal wave penetrates the solid. At the same time, the hot surface heats the neighbouring air, wh
Autor:
P. Durbetaki, Phuoc X. Tran
Publikováno v:
International Journal for Numerical Methods in Engineering. 30:859-873
Radiative ignition studies wre carried out on vertical 2.54 cm circular fabric pairs, and single fabrics of 2.54 cm diameter and 15.2 × 15.2 cm. These fabrics were exposed to a time invariant radiative heat flux using the Large Ignition test Apparat
Autor:
M. B. Kennel, Johney B. Green, P. Durbetaki, J. S. Armfield, Robert M. Wagner, Charles E. A. Finney, James A. Drallmeier, C.S. Daw
Publikováno v:
SAE Technical Paper Series.
We describe a method for detecting and quantifying time irreversibility in experimental engine data. We apply this method to experimental heat-release measurements from four sparkignited engines under leaning fueling conditions. We demonstrate that t
Autor:
Kalyan Annamalai, P. Durbetaki
Publikováno v:
Combustion and Flame. 27:253-266
Prediction of the fire hazard for a piece of garment exposed to a flaming heating source requires the development of a fabric ignition model which provides an accurate description of the flame-fabric interaction. Ignition times have been measured ear
Autor:
C.C. Ndubizu, P. Durbetaki
Publikováno v:
Fire Safety Journal. 1:281-290
A model is presented to predict the radiative ignition time of a ventically oriented fabric in the presence of air. Both exothermic and endothermic reactions are included in the pyrolysis process. Sample calculations predicted ignition times which ar
Publikováno v:
Fire Safety Journal. 1:243-254
Modeling analysis on the ignition of thermally thin and thermally thick materials uses an ignition criterion which incorporates the concentration dependent self-ignition temperature of the pyrolyzate-air mixtures. A device known as the lower ignition
Autor:
Kalyan Annamalai, P. Durbetaki
Publikováno v:
Combustion and Flame. 29:193-208
A century-long held notion was that the ignition of coal particles always occurs in the gas phase, as in a totally pyrolysing material. Recent experimental results disprove such a sequence, at least for small bituminous coal particles. Coals undergo
Autor:
P. Durbetaki, Tran X. Phuoc
Publikováno v:
International Journal for Numerical Methods in Engineering. 25:373-386
The ignition of a semi-infinite solid polymer under convective exposure is investigated. A quasi-steady approximation is used for the gas phase and the transient effect is accounted for in the solid phase only. Both surface and gas phase chemical rea