Comparison of Gas Velocity Measurements and CFD Predictions in the Exhaust Duct of a Stationary Source

Published

July 13, 2011

Author(s)

Rodney A. Bryant, Olatunde B. Sanni, Elizabeth F. Moore, Robert P. Borthwick, Marco G. Fernandez, Iosif I. Shinder, Jiann C. Yang, Aaron N. Johnson

Abstract

Two series of independent flow measurements were conducted for cross validation of flow velocity in the exhaust duct of the NIST Large Fire Laboratory. In the first series, two pressure measurement probe types, an S probe and a 3-D probe, were used to perform velocity profiling across two chords of the exhaust duct. Several detailed velocity profiles were generated using a probe traverse spacing of 2.54 cm (1.0 in). CFD simulations showed good qualitative agreement for cold flow conditions. The second series of measurements used two S probes, one on each chord, and a minimum of 20 EPA Method 1 traverse positions per chord. Qualitative comparisons of the velocity profiles showed that the flow profiles at the sampling plane were sensitive to run conditions such as flow inlet location, flow magnitude, and heat content of the flow.

Proceedings Title

Proceedings: Continuous Emissions Monitoring User Group Conference & Exhibit 2011

Conference Dates

June 8-10, 2011

Conference Location

Chicago, IL

Conference Title

Continuous Emissions Monitoring User Group Conference & Exhibit 2011

Pub Type

Conferences

Download Paper

Local Download

Keywords

flow measurement, CFD, emissions monitoring

Citation

Bryant, R. , Sanni, O. , Moore, E. , Borthwick, R. , Fernandez, M. , Shinder, I. , Yang, J. and Johnson, A. (2011), Comparison of Gas Velocity Measurements and CFD Predictions in the Exhaust Duct of a Stationary Source, Proceedings: Continuous Emissions Monitoring User Group Conference & Exhibit 2011, Chicago, IL, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=908658 (Accessed October 22, 2025)