TURBULENT SPRAYS IN STAGNATION FLOWS

S. C. Li; P. A. Libby; Forman A. Williams

doi:10.1615/AtomizSpr.v5.i3.30

Atomization and Sprays

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Published 12 issues per year

ISSN Print: 1044-5110

ISSN Online: 1936-2684

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TURBULENT SPRAYS IN STAGNATION FLOWS

Volume 5, Issue 3, 1995, pp. 287-304

DOI: 10.1615/AtomizSpr.v5.i3.30

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S. C. Li
Center for Energy and Combustion Research, Department of Applied Mechanics and Engineering Sciences, University of California, San Diego, La Jolla, CA 92093, USA

P. A. Libby
Center for Energy and Combustion Research, Department of Applied Mechanics and Engineering Sciences, University of California, San Diego, La Jolla, CA 92093, USA

Forman A. Williams
Mechanical and Aerospace Engineering, University of California-San Diego, San Diego, CA, USA

ABSTRACT

An experimental study of turbulent sprays of methanol impinging on a wall is reported. The turbulence is generated by a grid in the duct carrying the droplets in an air stream. Measurements of droplet diameter and of two components of droplet velocity are made with a phase Doppler particle analyzer (PDPA). Small and large droplets are observed to behave differently. By associating the velocity of the smallest droplets with that of the gas, some aspects of the statistics of the relative velocity between the gas and droplets of various sizes are obtained. Comparison with theoretical estimates of mean and fluctuating droplet velocities helps reveal how different-sized droplets respond differently to turbulence.

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