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Agricola_MS_Thesis.pdf (6.22 MB)

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Nozzle Guide Vane Sweeping Jet Impingement Cooling

Agricola, Lucas
http://rave.ohiolink.edu/etdc/view?acc_num=osu1525436077557298

Abstract Details

2018, Master of Science, Ohio State University, Aero/Astro Engineering.
Sweeping jet impingement cooling was investigated in a gas turbine nozzle guide vane design with an engine-relevant Biot number of 0.3. Sweeping jets were created with fluidic oscillators and were compared to steady jets produced by cylindrical orifices (with length-to-diameter ratio of 1), the current state-of-the-art in engine designs. Experiments were performed in a low speed linear cascade with additively manufactured test pieces. The impingement cooling geometries were examined at multiple coolant mass flow rates and freestream turbulence intensities. The overall effectiveness of each cooling geometry was calculated using thermocouple measurements of the freestream and coolant temperatures, and infrared thermography measurements of the vane external surface temperature. A computational thermal inertia technique was used to determine the internal Nusselt numbers. The heat transfer provided by steady impinging jets produced a higher overall effectiveness and Nusselt number in the leading edge geometry. The sweeping jets provided more uniform heat transfer, reducing thermal gradients near the stagnation point. Pressure drop across each jet geometry was measured at a range of applicable mass flow rates. Fluidic oscillators were shown to create similar pressure drop to circular orifice holes when additive manufacturing abilities were fully incorporated in the nozzle guide vane internal cooling designs.
Jeffrey Bons (Advisor)
Ali Ameri (Committee Member)
James Gregory (Committee Member)
106 p.
Aerospace Engineering
Turbomachinery; Gas turbine; heat transfer; impingement; sweeping jet; thermal inertia; nozzle guide vane; additive manufacturing

Recommended Citations

Citations

  • Agricola, L. (2018). Nozzle Guide Vane Sweeping Jet Impingement Cooling [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1525436077557298

    APA Style (7th edition)

  • Agricola, Lucas. Nozzle Guide Vane Sweeping Jet Impingement Cooling. 2018. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1525436077557298.

    MLA Style (8th edition)

  • Agricola, Lucas. "Nozzle Guide Vane Sweeping Jet Impingement Cooling." Master's thesis, Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1525436077557298

    Chicago Manual of Style (17th edition)

osu1525436077557298
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This open access ETD is published by The Ohio State University and OhioLINK.