The Spray Structure from Swirl Atomizers. 1st Report, General Characteristics and Structure of a Spray of a Swirl Atomizer.

Abstract

The drop size, velocity and volume flux and their distributions were measured to clarify the spray structure from a swirl atomizer. A inner region of a spray consists of smaller drops which are entrained by induced air. In outer region, larger drops with larger momentum traject at straight from an atomizer. The region between them consists of drops with the characteristics of the inner region and of the outer region. From those results, a structure model of a spray from a swirl atomizer was proposed. A spray consists of a disintegration region, a main flow region, and a stagnated flow region along the axis. The main flow region can be divided into two regions, an entrained flow region inner and an sheath region outer.