Browse Topic: Fire suppression

Items (21)
The emergence of electric Vertical Takeoff and Landing (eVTOL) air vehicles is transforming how people and freight are moved in short distances. This transformation has a profound impact on surrounding infrastructure necessary to provide Aircraft On Ground support for eVTOLs. The hover capabilities of eVTOLs have similar operating characteristics within terminal and uncontrolled airspace. However, the need to conserve battery energy via rapid approaches and departures affects terminal airspace management. To attract eVTOL operators, existing airports, landing zones, and vertiports are modifying their infrastructure to include fixed electric charging stations, additional taxiways, upgraded fire suppression systems, separate hangers, and capable MRO facilities. Augusta Regional Airport (KAGS) is the base airport for the annual Masters Golf Tournament which experiences five times the normal airport traffic and some 40,000 commuting patrons. eVTOLs can offset land traffic issues associated with commuters and supplies. Since KAGS is centroid to 32,000 square miles of territory void of major highways, basing eVTOLs can offer expedited transit services for people and goods which will have a profound impact on the economic viability and quality of life in the area.
Stanzione, KaydonJohnston, Diane
This SAE Aerospace Recommended Practice (ARP) provides guidelines for the effective operation and use of fire containment covers (FCCs). Technical Standard Orders (TSOs) C203 and C90e (and later revisions) incorporate AS6453, and provide the Minimum Performance Standards (MPS) for an FCC design. The net and pallet used with the FCC must be approved using the updated net and flammability requirements in TSO C90e and later revisions. However, fire containment performance also requires this equipment is properly used. Fire safety is compromised when FCCs are used in an inadequate manner.
AGE-2 Air Cargo
A hyperbaric chamber has been designed to achieve the goals of maximizing safety, minimizing complexity, and minimizing cost of hyperbaric chamber therapy. This design minimizes the volume of compressed gas in the chamber, and eliminates the need for complex gas mixing, carbon dioxide scrubbing, thermal management, and fire suppression systems. The simple pressurization system affords safe operation by minimally trained personnel. It requires only clean water and small volumes of compressed oxygen, and uses no electrical power. These features allow the chamber to be used in remote, undeveloped locations where hyperbaric oxygen therapy is currently not feasible.
Wildfires that start in backcountry areas sometimes burn for hours before being detected and reported. Satellites offer a vantage point from which infrared sensors can detect fires. Individual satellites in low Earth orbit (LEO) offer infrequent overpasses, making the delay from ignition to detection unacceptably long. Geostationary satellites offer a platform from which to maintain a round-the-clock vigil, but lack geographic precision, and cannot detect a rather small fire within a large pixel definitively above noise.
CFD Modelling on Fire Detection and Suppression in a Columbus Rack9416076/1/1994
The Columbus fire suppression procedure is based on a centralized CO2 distribution system which injects the CO2 stored in a tank into the volume where the fire has to be extinguished. The fire is detected in each volume by means of the so-called REP (Rack Essential Package), which contains a fan and the smoke sensor. In order to assess the Fire Detection and Suppression design concept and to identify possible critical areas, Alenia Spazio - with the support of Flowsolve UK, and on behalf of EUROCOLUMBUS - has performed an analysis using a Computational Fluido-Dynamic (CFD) tool. The rack containing the water pump assembly and other electronic equipment has been chosen for the study. As far as the Fire Detection is concerned, the simulation intends to predict the flow field established in the rack by the ventilation system and the transport of smoke by this velocity field from a supposed point source. The smoke from any fire within the rack must be transported to the sensor so the fire can be detected within a “reasonable” time. The Fire Suppression System has more stringent targets to meet: the CO2 must reach a 50% concentration by volume everywhere in the rack within 60 seconds. The aim of the CFD simulation was to study various combinations of CO2 nozzle and pressure relief vent positions and numbers so that the configurations which fulfill the 50% requirement can be determined. The simulation has been performed using the 1.6.5 version of the PHOENICS general-purpose CFD code.
Veneri, RuggeroParodi, Paola
Columbus APM Environmental Control System Overview: Space Station and APM Restructuring Consequences9413056/1/1994
This paper describes the main changes affecting the APM Environmental Control System (ECS) as a consequence of the Space Station Freedom (SSF) restructuring and Columbus APM overall reconfiguration. The main purposes of this reconfiguration are: minimize the number and complexity of the interfaces with Space Station Freedom (SSF) centralize avionics command and monitoring tasks revisit the failure tolerance concept of some ECS functions unify/standardize similar functions in the two subsystem adjust lifetime requirements and simplify maintenance concept of equipment. The APM ECS consists of the following functions: active thermal control (ATCS) passive thermal control (PTCS) atmosphere pressure and composition control air revitalization and cabin ventilation temperature and humidity control vacuum and venting nitrogen supply fire detection and suppression. The new ATCS configuration provides a cooling capability for a reduced number of P/L racks by means of its moderate loop. No modification is envisaged on the low temperature loop. Failure cases on both SSF thermal buses and APM ATCS have been considered and assessed, resulting in an optimization of the ATCS operation in off-nominal modes. Due to the adoption of a new APM launcher (ARIANE 5) instead of NSTS, the Negative Pressure Relief function is no longer required. A new cabin loop architecture is considered based on the use of three fans for air distribution in the APM thermal conditioning and air exchange with the adjacent SSF node (Intermodule Ventilation). As far as the Vacuum and Venting system is concerned, the only changes are the reduction of the connected lateral P/L racks and the deletion of the venting interface with the SSF. The same lateral P/L racks are also connected to the Nitrogen Supply system with the deletion of the relevant interface valves. The main change in the Fire Detection system concerns the new location of smoke detectors within the cabin loop. The Fire Suppression system is impacted due to the reduction of the number of enclosures requiring a fire suppression capability. Optimization in heater control has been achieved, while the decentralized valve control concept has been deleted in favour of a centralized one via Power Distribution Unit (PDU).
Gargioli, EugenioBalocco, PaoloLeiseifer, Hans PeterSarri, Giuseppe
Items per page:
1 – 21 of 21