Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Characterization of the Inlet Combustion Air in NIST's Reference Spray Combustion Facility: Effect of Vane Angle and Reynolds Number.

Published

Author(s)

J F. Widmann, S R. Charagundla, Cary Presser

Abstract

The airflow through a 12-vane cascade swirl generator is examined numerically to characterize the inlet combustion air in the reference spray combustion facility at NIST. A three-dimensional model is used to simulate the aerodynamics in the swirl generator that imparts the desired degree of angular momentum to the air in the annulus leading into the reactor. A parametric study is presented in which the effects of the vane angle and Reynolds number are examined. Reynolds numbers ranging from 5,000 to 30,000 and vane angles ranging from 30 deg to 60 deg are investigated. For a vane angle of 50 deg, which is the current operating condition of the swirl generator, a recirculation zone develops at the exit of the annulus for Reynolds number, Re = 9500. The Renormalization Group method (RNG) k-e turbulence model is used to model the transport, production, and dissipation of turbulence due to its superior performance (relative to the standard k-e turbulence model) for this type of flow.
Citation
NIST Interagency/Internal Report (NISTIR) - 6458
Report Number
6458

Keywords

combustion, Reynolds number, turbulence, fluid mechanics, numerical analysis, validation, computational fluid dynamics

Citation

Widmann, J. , Charagundla, S. and Presser, C. (2000), Characterization of the Inlet Combustion Air in NIST's Reference Spray Combustion Facility: Effect of Vane Angle and Reynolds Number., NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.IR.6458 (Accessed April 13, 2024)
Created January 1, 2000, Updated November 10, 2018