Combustion, Explosion, and Shock Waves 

About: Combustion, Explosion, and Shock Waves is an academic journal published by Nauka. The journal publishes majorly in the area(s): Combustion & Detonation. It has an ISSN identifier of 0010-5082. Over the lifetime, 6483 publications have been published receiving 39983 citations. The journal is also known as: Combustion, Explosion and Shock Waves.

Correlating Aluminum Burning Times

Abstract: Characteristics of aluminum combustion are summarized in an overview of the subject, focusing on the burning time of individual particles. Combustion data from over ten different sources with almost 400 datum points have been cataloged and correlated. Available models have also been used to evaluate combustion trends with key environmental parameters. The fundamental concepts that control aluminum combustion are discussed, starting from a discussion of the D n law. The exponent in the D n law is shown to be lower than two, with nominal values of ≈1.5 to 1.8 being typical. The effect of the ambient medium on the burning time is considered, oxygen as an oxidizer being twice as effective as water and about five times more effective than carbon dioxide. The effect of pressure and initial temperature is minor.

Combustion of Nano Aluminum Particles (Review)

Abstract: Nano aluminum particles have received considerable attention in the combustion community; their physicochemical properties are quite favorable as compared with those of their micron-sized counterparts. The present work provides a comprehensive review of recent advances in the field of combustion of nano aluminum particles. The effect of the Knudsen number on heat and mass transfer properties of particles is first examined. Deficiencies of the currently available continuum models for combustion of nano aluminum particles are highlighted. Key physicochemical processes of particle combustion are identified and their respective time scales are compared to determine the combustion mechanisms for different particle sizes and pressures. Experimental data from several sources are gathered to elucidate the effect of the particle size on the flame temperature of aluminum particles. The flame structure and the combustion modes of aluminum particles are examined for wide ranges of pressures, particle sizes, and oxidizers. Key mechanisms that dictate the combustion behaviors are discussed. Measured burning times of nano aluminum particles are surveyed. The effects of the pressure, temperature, particle size, and type and concentration of the oxidizer on the burning time are discussed. A new correlation for the burning time of nano aluminum particles is established. Major outstanding issues to be addressed in the future work are identified.

Self-similar propagation of a free turbulent flame in mixed gas mixtures

Abstract: L. D. Landau believed that hydrodynamic instability of a flame, which he discovered theoretically [i], should in itself lead to the appearance of turbulent motion and to turbulent propagation of the combustion front already for Reynolds numbers Re = unR/v ~ 1 (u n is the normal rate of combustion and R is the radius of the visible front). Experiments show that a free spherical or cylindrical laminar flame from a weak source of ignition, in the absence of any significant perturbations (rigid wall, obstacles, buoyancy forces), does indeed become unstable, turbulent, and self-accelerating, but for Re e 103-105 .