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Technical Paper

A Fuel Consumption Simulator for Teaching Efficient Driving Practices

2008-04-14
2008-01-1291
A fuel consumption simulator was developed to help students in driver's education courses identify driving practices that maximize a vehicle's fuel economy. To maintain the interest of teenage students, a computer program was developed as a first-person driving simulation and was made to resemble the video-game driving simulators that are available for recreation. To keep the costs of using the simulator reasonably low for high schools, the simulator was developed for use with Windows based computers and off-the-shelf driving controls for video games. While the simulator was created for use with off-the-shelf equipment, the simulator uses an incompressible flow model of the intake and exhaust processes with realistic transmission and torque converter models to predict fuel consumption and vehicle performance. The engine and transmission models were calibrated using manufacturer reported engine performance data.
Technical Paper

A Biodiesel Mini Baja Vehicle and Student Competition

2008-04-14
2008-01-1293
The SAE Mini Baja® competition is an extremely popular design competition that focuses on the design of an off-road vehicle for performance and cost-of-production. A 2006-07 EPA P3 Phase I grant was awarded to the University of Alabama at Birmingham to convert a vehicle created for the SAE Mini Baja® competition to a biodiesel vehicle. Because of the major size difference in the diesel engine chosen compared to the much smaller gasoline engine, conversion of the Baja vehicle required considerably more effort than expected. While many mechanical aspects of the bio-diesel conversion were more complicated than expected, the students were successful in creating bio-diesel and in modifying important vehicle systems. The students also gained a substantial understanding of the economical and environmental aspects of alternative fuel generation. Through the conversion experience gained at UAB, the rules for a new competition were explored.
Technical Paper

Cold Soaked Fuel Frost Roughness Evolution on a Simulated Integrated Fuel Tank with Aluminum Skins

2023-06-15
2023-01-1442
Cold soaked fuel frost (CSFF) is frost that forms on aircraft wing surfaces following a flight because of cold excess fuel remaining in integrated fuel tanks. Previous investigations by Zhang et al. (2021a) and Zhang et al. (2021b) have focused on experimental measurements and correlation development for frost observed using a small frost wind tunnel employing a thermo-electric cooler to impose a surface temperature for a range of environmental conditions. To model the CSFF approach in more detail, an experimental facility was developed and described by McClain et al. (2020) using a thermal model of an integrated wing fuel tank placed inside of a climatic chamber. In this paper, experimental measurements of CSFF are presented using two aluminum wing skins. One of the skins was created using an aluminum rib structure, and the other skin was created without the rib.
Technical Paper

Photogrammetric Frost Roughness Measurements in Cold-Soaked Conditions

2019-06-10
2019-01-1970
Cold-soaked fuel frost (CSFF) is a form of aircraft wing contamination that occurs when a vehicle caries sufficient fuel for multiple trips or take-offs and landings. Following the first trip, which may reach altitudes above 10,000 m (33,000 ft), the fuel for the subsequent trips is carried in the wing tanks and may reach temperatures below -25 °C. In certain times of the year at some airports, temperatures and humidity levels will form CSFF on the aircraft wing surfaces over the fuel tanks. Unless an exemption is granted for the specific aircraft model, aircraft are not allowed to takeoff if the wing surfaces are contaminated by frost. Because aircraft operators desire to minimize vehicle time spent at airports, aircraft manufacturers are expected to pursue designs that safely operate with CSFF at takeoff and to pursue certification exemptions for aircraft models enabling CSFF takeoffs.
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