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Automotive Engineering Commons

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Full-Text Articles in Automotive Engineering

Advances In Automotive Conversion Coatings During Pretreatment Of The Body Structure: A Review, Mark Doerre, Larry Hibbitts, Gabriela Patrick, Nelson K. Akafuah Nov 2018

Advances In Automotive Conversion Coatings During Pretreatment Of The Body Structure: A Review, Mark Doerre, Larry Hibbitts, Gabriela Patrick, Nelson K. Akafuah

Institute of Research for Technology Development Faculty Publications

Automotive conversion coatings consist of layers of materials that are chemically applied to the body structures of vehicles before painting to improve corrosion protection and paint adhesion. These coatings are a consequence of surface-based chemical reactions and are sandwiched between paint layers and the base metal; the chemical reactions involved distinctly classify conversion coatings from other coating technologies. Although the tri-cationic conversion coating bath chemistry that was developed around the end of the 20th century remains persistent, environmental, health, and cost issues favor a new generation of greener methods and materials such as zirconium. Environmental forces driving lightweight material selection ...


Study Of Near-Cup Droplet Breakup Of An Automative Electrostatic Rotary Bell (Esrb) Atomizer Using High-Speed Shadowgraph Imaging, Jacob E. Wilson, Stephen William Grib, Adnan Darwish Ahmad, Michael W. Renfro, Scott A. Adams, Ahmad Salaimeh May 2018

Study Of Near-Cup Droplet Breakup Of An Automative Electrostatic Rotary Bell (Esrb) Atomizer Using High-Speed Shadowgraph Imaging, Jacob E. Wilson, Stephen William Grib, Adnan Darwish Ahmad, Michael W. Renfro, Scott A. Adams, Ahmad Salaimeh

Mechanical Engineering Faculty Publications

Electrostatic Rotary bell (ESRB) atomizers are used as the dominant means of paint application by the automotive industry. They utilize the high rotational speed of a cup to induce primary atomization of a liquid along with shaping air to provide secondary atomization and transport. In order to better understand the fluid breakup mechanisms involved in this process, high-speed shadowgraph imaging was used to visualize the edge of a serrated rotary bell at speeds varying between 5000 and 12,000 RPM and with a water flow rate of 250 ccm. A multi-step image processing algorithm was developed to differentiate between ligaments ...


Characterization Of Rotary Bell Atomizers Through Image Analysis Techniques, Jacob E. Wilson Jan 2018

Characterization Of Rotary Bell Atomizers Through Image Analysis Techniques, Jacob E. Wilson

Theses and Dissertations--Mechanical Engineering

Three methods were developed to better understand and characterize the near-field dynamic processes of rotary bell atomization. The methods were developed with the goal of possible integration into industry to identify equipment changes through changes in the primary atomization of the bell. The first technique utilized high-speed imaging to capture qualitative ligament breakup and, in combination with a developed image processing technique and PIV software, was able to gain statistical size and velocity information about both ligaments and droplets in the image data. A second technique, using an Nd:YAG laser with an optical filter, was used to capture size ...