Flow modeling of flat oval ductwork elbows using computational fluid dynamics

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:345222

Mahank, T A; Mumma, S A ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States)

Incompressible turbulent flow fields in heating, ventilating, and air-conditioning (HVAC) elbows were computed using an incompressible, three-dimensional computational fluid dynamics (CFD) solver implementing a {kappa}-{epsilon} turbulence model. Two different geometries were investigated, including 90-degree five-gore hard-bend and easy-bend flat oval elbows. The geometries represent a subset of many configurations analyzed in ASHRAE RP-854, Determination of Duct Fitting Resistance by Numerical Analysis. For each configuration, the zero-length pressure loss coefficient was calculated. The flow was described through contours of velocity and plots of static pressure. The Reynolds number for these flows was held constant at 100,000 based on duct diameter and mean fluid velocity.

• OSTI ID: 345222
• Report Number(s): CONF-9702141--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
DUCTS
FLOW MODELS
GEOMETRY
INCOMPRESSIBLE FLOW
NUMERICAL ANALYSIS
SPACE HVAC SYSTEMS
THREE-DIMENSIONAL CALCULATIONS
TURBULENT FLOW