Particle-laden swirling free jets - measurements and predictions
A 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. 18 references.
- Research Organization:
- NASA, Lewis Research Center, Cleveland, OH; Sverdrup Technology, Inc., Cleveland, OH; Michigan Univ., Ann Arbor
- OSTI ID:
- 6133308
- Report Number(s):
- AIAA-Paper-87-0303; CONF-870133-
- Journal Information:
- AIAA J.; (United States), Conference: 25. AIAA aerospace sciences meeting, Reno, NV, USA, 12 Jan 1987; Other Information: Previously announced in STAR as N--87-16826
- Country of Publication:
- United States
- Language:
- English
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