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Particle-laden swirling free jets - Measurements and predictionsA theoretical and experimental investigation of single-phase and particle-laden weakly swirling jets was conducted. The jets were injected vertically downward from a 19 mm diameter tube with swirl numbers ranging from 0 to 0.33. The particle-laden jets had a single loading ratio (0.2) with particles having an SMD of 39 micrometers. Mean and fluctuating properties of both phases were measured using nonintrusive laser based methods while particle mass flux was measured using an isokinetic sampling probe. The continuous phase was analyzed using both a baseline k-epsilon turbulence model and an extended version with modifications based on the flux Richardson number to account for effects of streamline curvature. To highlight effects of interphase transport rates and particle/turbulence interactions, effects of the particles were analyzed as follows: (1) locally homogeneous flow (LHF) analysis, where interphase transport rates are assumed to be infinitely fast; (2) deterministic separated flow (DSF) analysis, where finite interphase transport rates are considered but particle/turbulence interactions are ignored; and (3) stochastic separated flow (SSF) analysis, where both effects are considered using random-walk computations.
Document ID
19870055374
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bulzan, D. L.
(NASA Lewis Research Center Cleveland, OH, United States)
Shuen, J.-S.
(Sverdrup Technology, Inc. Cleveland, OH, United States)
Faeth, G. M.
(Michigan, University Ann Arbor, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 87-0303
Accession Number
87A42648
Distribution Limits
Public
Copyright
Other

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