Exact(4)
A linear dependence of the extinction velocity as a function of droplet diameter constitutes the present state of knowledge.
Results for extinction velocity as a function of droplet diameter and freestream temperature are presented for an n-heptane droplet.
A correlation that accurately reproduces the numerical predictions for extinction velocity over a wide range of droplet diameters and ambient temperatures is presented.
Results from the recently conducted limited number of space based tests, presented in this paper, seem to confirm the prediction validating the closed-form formula for the critical extinction velocity.
Similar(56)
The diffusion flame extinction axial velocity profile has been measured, and the local extinction axial strain rate has been determined to be 710 s−1.
The eventual extinction during the velocity increase was categorized as either acoustic extinction or boundary layer extinction.
In this work, the effects of a nonunity Lewis number were estimated through experiments with a methane air flame; the eventual extinction during the velocity decrease was investigated in more detail; and the growth of the extinction boundary layer was analyzed with a transient one-dimensional model of the flame stretch.
The equation used to calculate specific activity was as follows: (extinction coefficient) × (velocity per min) × ((protein concentration in mg/ml)/(protein dilution factor in assay)).
The porous micro-combustor has the low-velocity extinction limits as low as ∼0.2 m/s and the blowout limits in terms of critical equivalence ratios increase with increasing inlet flow velocity.
Droplets above a certain diameter (approximately 30 μm for methane air flames) lead to a turning-point extinction, where the burning velocity at the turning point is approximately half of the unperturbed burning velocity without any water-mist loading.
For zero gravity the LOI based on wake flame extinction decreases rapidly with flow velocity for small velocities but with further increase in velocity the LOI value stays approximately constant.
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