Dispersion of Sprays in Solid-Injection Oil Engines

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Abstract
In investigating the problem of how to improve atomization and dispersion in the solid-injection oil engine, the knowledge of the mechanism of spray formation was found to be scant. In the researches covered by this paper, it was not attempted to develop a spray theory. A few experiments were made for the purpose of clearing up which physical forces do or do not participate in the atomization and distribution process. A large number of charts have been made representing sprays under various conditions, these seeming to point to the following general conclusions: Dispersion becomes more even when injection pressure is increased, when the oil viscosity is decreased, and when the air density is increased; the cone angle increases with increasing oil pressure, increasing air density, and decreasing viscosity of oil; a larger percentage of oil reaches a given distance in a spray having a slenderer spray cone; no definite influence of orifice dimensions was noticeable in using cylindrical orifices of the dimensions employed in the tests discussed.

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