...Seik Mansoor Ali; Vasudevan Raghavan; K. Velusamy; Shaligram Tiwari Concurrent flame spread over methanol pool surface under atmospheric conditions and normal gravity has been numerically investigated using a transient, two-phase, reacting flow model. The average flame spread velocities...

...S. S. Krishnan; M. K. Saini; Y. Zheng; J. P. Gore Radiative heat transfer in oxygen-enhanced inverse flame configurations is an important area of study for fundamental combustion research and for terrestrial and spacecraft fire safety. Motivated by this, heat flux distributions, total radiative...

... is also possible. The catalytic reactions can be beneficial in porous burners and catalytic reactors that use low equivalence ratios. In this case, the porous burner flame can be stabilized at low temperatures to prevent any substantial gas emissions, such as nitrogen oxides. The present paper...

...S. W. Dean; M. L. Pantoya; A. E. Gash; S. C. Stacy; L. J. Hope-Weeks Flame propagation and peak pressure measurements were taken of two nanoscaled thermites using aluminum (Al) fuel and copper oxide (CuO) or nickel oxide (NiO) oxidizers in a confined flame tube apparatus. Thermal equilibrium...

...Ya-Ting Tseng; James S. T’ien A detailed two-dimensional transient model has been formulated and numerically solved for concurrent flames over thick and thin solids in low-speed forced flows. The processes of flame growth leading to steady states are numerically simulated. For a thick solid...

...D. Liu; Q. X. Huang; F. Wang; Y. Chi; K. F. Cen; J. H. Yan A nonintrusive measurement technique is presented numerically for simultaneous measurement of three-dimensional (3D) soot temperature and volume fraction fields in the axisymmetric or asymmetric flames with charge-coupled device (CCD...

...Tairan Fu; Zhe Wang; Xiaofang Cheng Optical diagnostics techniques to measure diesel combustion flame temperatures are useful for evaluation and control of combustion processes. In this paper, diesel combustion flame temperatures are measured based on a multicolor pyrometry method respectively...

... are constructed for combustion gases such as CO 2 and H 2 O . Sample calculations are performed for a 1D medium and also for a 2D axisymmetric combustion flame. The narrow band-based hybrid method is observed to accurately predict heat transfer from extremely inhomogeneous gas-soot mixtures with/without wall...

... in diameter. These fractal aggregates were numerically generated using a combination of the particle-cluster and cluster-cluster aggregation algorithms with fractal parameters representing flame-generated soot. Ten different realizations were obtained for a given aggregate size measured by the number...

... influence of a mist addition as an opposed flow to a small-scale liquid (heptane) pool fire structure, especially at its base, the more interesting zone regarding the mechanisms of flame stabilization and extinction and, on the other hand, the effect on the surface radiant heat feedback. Experiments...

... composition and nitrogen dilution were investigated. Lean flame extinction limits were determined for the two fuels and were found to be unaffected by the presence of the catalytic surface. The flame extinction data indicated that the systems were controlled by gas phase combustion with negligible...

...Abhilash J. Chandy; David J. Glaze; Steven H. Frankel Due to the complex nonlinear coupling of turbulent flow, finite-rate combustion chemistry and thermal radiation from combustion products and soot, modeling, and/or simulation of practical combustors, or even laboratory flames undergoing strong...

... Incandescence: Excitation Intensity ,” Appl. Opt. 0003-6935 , 37 , pp. 1607 – 1616 . Vander Wal , R. L. , Zhou , Z. , and Choy , M. Y. , 1996 , “ Laser-Induced Incandescence Calibration via Gravimetric Sampling ,” Combust. Flame 0010-2180 , 105 , pp. 462 – 470 . Snelling...

...Lawrence A. Kennedy The combustion synthesis of carbon nanotubes is reviewed, examining their formation and control in diffusion flames. Much of the initial work in this area employed coflow diffusion flames and provided insight into carbon nanotube (CNT) formation. However, the inherent...

...Xi Jiang; Hua Zhao; Kai H. Luo A non-premixed impinging jet flame at a Reynolds number 2000 and a nozzle-to-plate distance of two jet diameters was investigated using direct numerical simulation (DNS). Fully three-dimensional simulations were performed employing high-order numerical methods...

.... The investigation reveals that during the combustion period, the heat flux and heat transfer coefficient vary substantially in space and time due to the transient nature of the flame propagation. For example, during the early stages of the flame impingement on the wall, the heat flux undergoes a rapid increase...

...Y. Levy; M. Lev; V. Ovcharenko The combustor that is a 30% flat (rectangular) model of an annular turbojet-engine combustion chamber was studied. It gave a turbulent nonpremixed kerosene-air flame with equivalence ratios within the range of 0.15–0.75. Measurements of CO 2 infrared radiation were...

...Hemant P. Mungekar; Arvind Atreya Motivated by heat transfer and environmental concerns, a study of flame radiation and soot particulate emission is reported for partial premixing in low strain-rate ( < 20 s − 1 ) methane counterflow flames. Temperature, OH concentration, and soot volume...

...M. Z. Haq A spherically expanding flame in a quiescent premixture is a bifurcation phenomenon, in which the flame becomes unstable at a radius, greater than some critical value, while remaining stable below that critical radius. Beyond this critical radius, developing instabilities are initiated...

...Amit Kumar; Kevin Tolejko; James S. T'ien A detailed, two-dimensional, laminar, flame spread model over a thin solid is solved in both a normal gravity downward spread configuration and in a microgravity quiescent atmosphere configuration. The radiation transfer equation is solved using discrete...