PPT-Modeling Heat and Smoke Movement in Aircraft Cabins with a Flexible Meshing FDS

Haiqing Guo 1 Marcos Vanella 2 Sean Crowley 1 Paul Scrofani 1 Richard E Lyon 1 1 William J Hughes Technical Center FAA Atlantic City NJ 2 NIST Gaithersburg NJ. Features• Tetrahedral meshing methods Mesh Controls - Transition/growth settings - Body, face, edge, vertex sizings- Body, face, edge, vertex sphere - Body, face, edge curvature-based ANSY Read R&N Ch. 14.1-14.2. Next lecture: Read R&N 18.1-18.4. You will be expected to know. Basic concepts and vocabulary of Bayesian networks.. Nodes represent random variables.. Directed arcs represent (informally) direct influences.. 2. Icing Factors. Liquid water content. Temperature. Droplet size. Cloud type. Airfoil geometry. Airspeed. Duration of exposure. 3. Where Icing is Likely to Occur. 4. Icing Risk. 5. Most icing tends to occur at temperatures between 0°and -20°C. Jake Blanchard. Spring 2008. Here we continue the meshing from last time. 3-D meshing options:. Free mesh a volume with tetrahedral elements. Extrude a meshed area. Sweep. Create volume. Mesh an area. An Educational Program to Improve the Level of Teaching Risk-Informed, Performance-based Fire Protection Engineering Assessment Methods. DJ Icove & AE Ruggles. Department of Nuclear Engineering. 1. Fall 2007. Some Modeling Approaches. Extrusion – Take an area and “extrude” it into a 3-D volume (Modeling/Operate/Extrude/Areas). Extrusion (continued). You can also extrude about an axis. Axis is identified by . ___________________________. CAD geometry based pre-processing for CFD using abstract modeling techniques. CastNet. : CAD-based . Pre-Processor . for . OpenFOAM. ®. Attributes: Concept of CAD associated . Parametric Study. Changmin Cao, May Corn, . Vaidya Sankaran. United Technologies Research Center. Kenneth Bell, Ama. n. da Daly, Terry Simpson. Kidde Fire Protection Systems. International Aircraft Systems Fire Protection Forum . CHAPTER 5 Fire Behavior Knowledge Objectives Describe the chemistry of fire. List the three states of matter. List the five forms of energy. Explain the concept of the fire triangle. Explain the concept of the fire tetrahedron. Case Study USS George Washington (CVN-73) 22 May 2008 Timeline of 22 May 2008 0600 While preparing for UNREP smoke was reported to bridge and thought incinerator was source. Bridge reported incinerator was secured. 3 combined elements create a continuous chemical reaction resulting in combustion. Take away just one and the chemical reaction is interrupted and the fire goes out. Camp fires. Everyone has seen one of these. www.xitadel.com XIPA ML Automation of typical Geometric features and Connections; Generic Modeling Specifications and Guidelines. • Save ~50% vs. Traditional Meshing time XIPA Custom: Custome Rodger Dyson. NASA Glenn Research Center. Exergy Analysis and Design Workshop. Wright Patterson Air Force Base. April 17-18, 2019. 1. v. 2. Prefer technology that:. improves fuel efficiency, . reduces emissions, . Rodger Dyson. NASA Glenn Research Center. CEC/ICMC. Hartford, CT. July . 24, . 2019. 1. v. . . 2. 2. Electric Aircraft Thermal Challenge. Current proposed solutions include:. Ram air HX. adds weight and aircraft drag.