This is in continuation of work done to study the parameters that affect fire suppressant delivery and distribution in an idealized aircraft engine nacelle, based on the quarter scale model used at WPAFB. The primary objective of this paper is to outline the study of the computational fluid dynamics (CFD) approach to study the injection and spread of an inert fire suppressant in an idealized aircraft engine nacelle and to validate the model used. The inert gas (Nitrogen) is used as the fire suppressant. Initially, the work done by Hammins is used as the basis for validating the computational model. The model settings are chosen based on work done by Crawford and then modified to better match the experimental data. The computational model and assumptions used are documented and suggestions for improved accuracy of CFD model are suggested before applying the CFD model to the WPAFB geometry to conduct preliminary studies of agent spread in the nacelle.

transport model, computational fluid dynamics, WPAFB geometry.

Received: April 9, 2024; Accepted: May 13, 2024; Published: November 4, 2024

How to cite this article: Sanjay Shanmugasundaram and Peter J. Disimile, Validation of species transport model to simulate agent transport in a nacelle, Advances and Applications in Fluid Mechanics 31(2) (2024), 63-92. https://doi.org/10.17654/0973468624004

This Open Access Article is Licensed under Creative Commons Attribution 4.0 International License

References:
[1] B. Crawford, J. K. Watterson, S. Raghunathan and J. Warnock, Modelling the dispersion of a fire suppressant through an idealised nacelle, 44th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, 2006.
[2] A. Hamins, T. G. Cleary and J. Yang, An analysis of the Wright Patterson full-scale engine nacelle fire suppression experiments, U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, Gaithersburg, MD, 1997.
[3] A. R. Black, J. M. Suo-Anttila, P. J. Disimile and J. R. Tucker, Numerical predictions and experimental results of air flow in a smooth quarter-scale nacelle, AIAA 40th Aerospace Sciences Meeting and Exhibit, AIAA 02- 0856, January 14- 17th 2002, Reno, Nevada.
[4] J. Hewson, S. Tieszen, W. Sundberg and P. DesJardin, CFD modeling of fire suppression and its role in optimizing suppressant distribution, NIST Special Publication (NIST SP) - 984-4, 2003.
[5] J. C. Hewson and D. R. Keyser, Predicting fire suppression in a simulated engine nacelle, NIST Special Publication (NIST SP) - 984-4, 2004.
[6] Sanjay Shanmugasundaram and Peter J. Disimile, CFD Analysis of Flow-field in a generic engine nacelle, International Journal of Engineering Sciences and Research Technology (IJESRT) 8(7) (2019), 173-196.
[7] P. J. Disimile, J. R. Tucker, B. Crosswell and J. M. Davis, The transport of water sprays past generic clutter elements found within engine nacelles, Fire Safety Journal 40 (2005), 65-78.
[8] J. M. Davis and P. J. Disimile, Effect of engine nacelle clutter density on downstream water spray distributions, Atomization and Sprays 18(6) (2008), 553-569.
[9] M. S. Caspers, R. C. Maple and P. J. Disimile, The effect of turbulent length scales on flow driven diffusion flames, AIAA 2007-1628, US Air Force T&E Days, 13-15 February 2007, Destin, Florida.
[10] M. S. Caspers, R. C. Maple and P. J. Disimile, CFD investigation of flow past idealized engine nacelle clutter, AIAA 2007-3825, the 18th AIAA Computation Fluid Dynamics Conference, 25-28 June 2007, Miami, FL.
[11] J. M. Davis and P. J. Disimile, Pool fire stability downstream of circular cylinders in an engine nacelle environment, The Sixth Triennial International Aircraft Fire and Cabin Safety Research Conference, Atlantic City, New Jersey, USA, October 25th -28th, 2010.