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Dissertation_OHLNK-Final.pdf (529.69 MB)

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MICROGRAVITY DROPLET COMBUSTION IN CARBON DIOXIDE ENRICHED ENVIRONMENTS

Hicks, Michael C
http://rave.ohiolink.edu/etdc/view?acc_num=case1461953095

Abstract Details

2016, Doctor of Philosophy, Case Western Reserve University, EMC - Mechanical Engineering.
Microgravity droplet combustion experiments were performed in atmospheres with elevated concentrations of CO2 at pressures of 1.0 atm, 3.0 atm, and 5.0 atm to examine the effects of a radiatively participating gas commonly used as a fire suppressant in space applications. Results were obtained from two unique experimental platforms, NASA Glenn Research Center’s 5.2 second drop tower (i.e., the Zero Gravity Facility “ZGF”) and the International Space Station (ISS). Tests performed in the ZGF deployed methanol and n-heptane droplets, with initial diameters ranging from 1.25 mm to 2.0 mm, onto a 120 micron quartz fiber. Tests performed on the ISS deployed n-heptane droplets with initial diameters ranging from 2.0 mm to 4.0 mm and were were either freely deployed or tethered with an 80 micron SiC fiber. Ambient atmospheres comprised 21% O2 with various concentrations of CO2 ranging from 0% to a maximum of 70% by volume with a balance of N2 . Results are reported showing the effects of a thermally participating gas at atmospheric and elevated pressures on the fuel droplet’s average burning rates, sooting propensity and, in the case of methanol at 1 atm, on its unique extinction mechanism.
James Tien, PhD (Advisor)
370 p.
Aerospace Engineering; Mechanical Engineering; Physical Chemistry; Physics; Radiation
microgravity; droplet combustion; combustion science; molecular gas radiation

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Citations

  • Hicks, M. C. (2016). MICROGRAVITY DROPLET COMBUSTION IN CARBON DIOXIDE ENRICHED ENVIRONMENTS [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1461953095

    APA Style (7th edition)

  • Hicks, Michael. MICROGRAVITY DROPLET COMBUSTION IN CARBON DIOXIDE ENRICHED ENVIRONMENTS. 2016. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1461953095.

    MLA Style (8th edition)

  • Hicks, Michael. "MICROGRAVITY DROPLET COMBUSTION IN CARBON DIOXIDE ENRICHED ENVIRONMENTS." Doctoral dissertation, Case Western Reserve University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1461953095

    Chicago Manual of Style (17th edition)

case1461953095
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© 2016, some rights reserved.Creative Commons License MICROGRAVITY DROPLET COMBUSTION IN CARBON DIOXIDE ENRICHED ENVIRONMENTS by Michael C Hicks is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.