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Addition Of Hydrogen And Oxygen From Electrolysis To A Gasoline-Fuelled Spark Ignition Engine., Karina Richters
Addition Of Hydrogen And Oxygen From Electrolysis To A Gasoline-Fuelled Spark Ignition Engine., Karina Richters
Electronic Theses and Dissertations
Automobile companies are under increasing pressure from environmental organizations and government regulators to develop more environmentally friendly automobiles, while buyers continue to want the performance and reliability of today's car. Therefore, researchers are continuing to experiment with methods to enhance the performance provided from an engine while reducing emissions. The use of hydrogen has been the focus of many researchers. One of the benefits of using hydrogen is the potential for substantial reduction in emissions. Unfortunately, one of the main obstacles is the development of a hydrogen engine is on-board hydrogen storage. It has been suggested that the use of …
An Investigation Into The Head And Neck Injury Potential Of Three-Year-Old Children In Forward And Rearward Facing Child Safety Seats., Rita Francesca Turchi
An Investigation Into The Head And Neck Injury Potential Of Three-Year-Old Children In Forward And Rearward Facing Child Safety Seats., Rita Francesca Turchi
Electronic Theses and Dissertations
This research focused on the injury potential of children in forward and rearward facing configurations involved in frontal collisions. Experimental sled tests were completed following the requirements of the Federal Motor Vehicle Safety Standard (FMVSS) 213 using a Hybrid III 3-year-old dummy in a forward facing configuration restrained in a child restraint system (CRS) that employed a five-point seat belt. The Hybrid III 3-year-old dummy was equipped with three uniaxial accelerometers arranged in mutually perpendicular directions in the head and chest. Experimental sled tests were also completed for a rearward facing configuration, but the results were not applicable due to …
Control-Oriented Model For Operation Of Hcci Engines., Faming Sun
Control-Oriented Model For Operation Of Hcci Engines., Faming Sun
Electronic Theses and Dissertations
A mathematical engine model is developed in this thesis to study the operation process in Homogeneous Charge Compression Ignition (HCCI) engines. Ethanol, an alternative fuel, is chosen for testing in this model. Two-step reaction mechanisms are implemented to model combustion process for which Arrhenius reaction rates are used. The simulation results are then compared with experimental data from a modified heavy-duty diesel engine. Results from this model show good correlation with experiment with respect to combustion phasing, pressure rise and peak pressure. Based on this model, a controller could be synthesized to keep HCCI ignition at a minimum advance for …
Crush Characteristics Of Quasi-Statically Loaded Square Aluminum Tubes With Circular Hole Discontinuities., Bryan Arnold
Crush Characteristics Of Quasi-Statically Loaded Square Aluminum Tubes With Circular Hole Discontinuities., Bryan Arnold
Electronic Theses and Dissertations
The research completed for this thesis is focused on the energy absorption capabilities of axially loaded structures fabricated from aluminum alloy extruded tubing with a square cross section. Quasi-static compressive testing is used to examine the effects of different sizes of dual centrally-located circular hole discontinuities on the crush characteristics of the extrusion absorber test specimens. Test specimens fabricated from three types of aluminum alloy extrusion stock material, AA6061-T4, AA6061-T6, and AA6063-T5, and two wall thicknesses were considered in the crush testing. Finite element models of each of the test specimens were developed using a material model incorporating damage mechanics. …
Study Of Crossflow Cooling And Heating Of Air Via An In-Line Elliptical Tube Array Heat Exchanger., Mesbah-Ul Ghani Khan
Study Of Crossflow Cooling And Heating Of Air Via An In-Line Elliptical Tube Array Heat Exchanger., Mesbah-Ul Ghani Khan
Electronic Theses and Dissertations
In current study, airside heat transfer and flow characteristics of an elliptical tube array heat exchanger were experimentally investigated by examining the effects of Reynolds number on Nusselt number and pressure drop coefficient. In a thermal wind tunnel, the air-cooling and air-heating experiments were conducted via an array of 18 elliptical tubes (each 300 mm long) with their 31.7 mm major axis parallel to the air crossflow. The tubes, minor-to-major axis ratio of 0.3, were evenly spaced by 6.1 mm airgap. The array was placed in a 300 x 300 mm2 and 600 mm long test section. Water entered the …