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Design, Development and Validation of UC Film Cooling Research Facility

Kandampalayam Kandasamy Palaniappan, Mouleeswaran
http://orcid.org/0000-0003-2505-4171
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1511863107613678

Abstract Details

2017, MS, University of Cincinnati, Engineering and Applied Science: Aerospace Engineering.
Film cooling effectiveness can be measured by thermal and mass transfer analysis. We have designed and developed a flat plate adiabatic wind tunnel facility to study film cooling effectiveness of selected film hole geometries by mass transfer analysis using a heavy gas (CO2) as a substitute for the coolant, measuring the mixing by both gas sampling and full field measurements by an optical measurement technique using pressure/oxygen sensitive paint. The flat plate adiabatic wind tunnel consists of a 24” long by 1.5” x 4” rectangular duct with a 0.5” radiused inlet mounted on a 15.5” ID x 24.5” long mainstream air plenum. Air was supplied to one end of the mainstream air plenum and forced through flow straightening components such as a perforated metal plate and honeycomb layers exiting through the wind tunnel.Cooling flow (CO2) was injected into the mainstream air through film cooling holes in test coupons that are attached to the top surface of 1.5” x 4” x 3” high cooling plenum, mounted on an opening in the bottom surface of the wind tunnel, 5” from the duct inlet. The test coupons are 3” x 5.5” x 0.375” thick with a centrally reduced pocket of 2” x 4” x 0.17” thickness. The film cooling holes are of 0.1” diameter. The tests were run for three cases of round (cylindrical), inclined film cooling holes (25°, 30° and 35°) at a coolant to mainstream density ratio of 1.5 and a mainstream Mach number, M# of 0.14 with a Blowing ratio, M ranging from 0.5 to 2.0 in increments of 0.25. The mass concentrations of the coolant gas were measured at discrete locations downstream of coolant injection by bleeding gas samples through instrumentation taps and passing them through a gas (CO2) analyzer. Film cooling effectiveness was then calculated by mass transfer analysis using the coolant gas concentrations. The test facility was validated by comparing the results with published data. The effects of blowing ratio and other flow parameters on film cooling effectiveness were studied in detail by analyzing and interpreting the results.
Ephraim Gutmark, Ph.D. (Committee Chair)
Shaaban Abdallah, Ph.D. (Committee Member)
Jeffrey Kastner, Ph.D. (Committee Member)
206 p.
Aerospace Materials
Film Cooling; Round holes; Facility Validation; Gas analysis; Mass transfer analogy; Density ratio

Recommended Citations

Citations

  • Kandampalayam Kandasamy Palaniappan, M. (2017). Design, Development and Validation of UC Film Cooling Research Facility [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1511863107613678

    APA Style (7th edition)

  • Kandampalayam Kandasamy Palaniappan, Mouleeswaran. Design, Development and Validation of UC Film Cooling Research Facility. 2017. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1511863107613678.

    MLA Style (8th edition)

  • Kandampalayam Kandasamy Palaniappan, Mouleeswaran. "Design, Development and Validation of UC Film Cooling Research Facility." Master's thesis, University of Cincinnati, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1511863107613678

    Chicago Manual of Style (17th edition)

ucin1511863107613678
286
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This open access ETD is published by University of Cincinnati and OhioLINK.