The Use of CFD to Analyze and Predict the Pressure Drop Along Flat Oval Duct Fittings

Authors

Erin Drake, San Jose State University
Nicole Okamoto, San Jose State UniversityFollow
Ernie Thurlow, San Jose State UniversityFollow

Publication Date

7-1-2020

Document Type

Conference Proceeding

Publication Title

ASHRAE Transactions

Volume

126

Issue

2

First Page

493

Last Page

500

Abstract

Very few loss coefficients are available in ASHRAE databases for flat oval duct fittings. The use of CFD instead of lab experiments to determine loss coefficients for duct fitting has been validated using comparisons to existing data for round and flat oval duct fittings. Experimental data for a variety of fitting geometries and flow rates were all within 20% of CFD results. Following the benchmark, loss coefficients for flat oval mitered 90° fittings and a flat oval three gore 45° fitting were determined. For future work, surface roughness will be added to the CFD model to improve accuracy, and a wider range of fittings will be evaluated.

Department

Mechanical Engineering

Recommended Citation

Erin Drake, Nicole Okamoto, and Ernie Thurlow. "The Use of CFD to Analyze and Predict the Pressure Drop Along Flat Oval Duct Fittings" ASHRAE Transactions (2020): 493-500.