Validation of a Simulation Tool for an Environmentally Friendly Aircraft Cargo Fire Protection System

Abstract

One of the objectives of the CleanSky-2 project is to develop an Environmentally Friendly Fire Protection (EFFP) system to substitute halon for the aircraft cargo hold. For this, an aircraft demonstrator including the cargo hold was equipped with a nitrogen-based fire suppression system. The demonstrator is located in the Flight Test Facility (FTF) low-pressure vessel and can thus be subjected to realistic cruise pressure conditions and take-off and descent pressure profiles. As a design tool, a zonally refined simulation model to predict the local oxygen and nitrogen concentration distribution in the cargo hold has been developed using the Indoor Environment Simulation Suite (IESS). The model allows for fast transient simulations of the suppression system operation. This paper presents a model validation case of knockdown during cruising, followed by a holding phase and descent.

Electrical Disturbances in Terms of Methods to Reduce False Activation of Aerial Fire Protection Systems

“…The fire protection system on board can be in the form of a simple fire-extinguishing system (activated manually by the pilot) [ 7 , 8 ] or a complex automatic fire detection and suppression system [ 9 , 10 , 11 ].…”

Special Issue “10th EASN International Conference on Innovation in Aviation & Space to the Satisfaction of the European Citizens”

“…The effectiveness of the proposed control architecture and control laws is demonstrated in numerical simulations. Pathak et al [5] present their work on a model validation case for the distribution of the agent of an environmentally friendly fire protection system (EFFP) in the cargo hold of an aircraft. In the low-pressure vessel of the Fraunhofer Flight Test Facility (FTF), the team was able to equip an aircraft demonstrator with an EFFP and to validate refined simulation models for knockdown during different flight phases in this setup.…”