Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


14049.pdf (4.18 MB)

ETD Abstract Container

Abstract Header

Spatiotemporal Distribution of Soot Temperature for Fuel-Rich Flames under Unsteady Inlet Airflow Conditions

Cakmakci, Arda
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1427812554

Abstract Details

2015, MS, University of Cincinnati, Engineering and Applied Science: Aerospace Engineering.
Two pyrometric tools for measuring soot temperature response in flames under unsteady inlet airflow conditions and naturally-occurring combustion instabilities are developed. High-speed pyrometry using a high-speed color camera is used and its results are compared with those of global temperature measured using a multi-wavelength pyrometer. For the former, the pixel RGB values pertaining to respective bandwidths of red, green and blue filters are used to calculate temperature and for the latter, the emission from whole flame over narrow bandwidth (±5 nm) of wavelength centered at 660 nm, 730 nm and 800 nm is used to measure temperature. Detailed procedure for camera calibration and verification of accuracy are outlined. The combustor, running on Jet-A liquid fuel, achieves unsteady inlet airflow using a siren running at frequencies of 150 and 250 Hz and with modulation levels (RMS) 20-50% of mean velocity. Spatiotemporal response of flame temperature fluctuation measured by the high speed camera is presented by phase-averaged with average subtracted images and video fast Fourier transform at dominant forcing frequencies. The results of global temperature and temperature fluctuation show reasonable agreement between the 3-color pyrometer and high speed camera. Temperature discrepancies between the three measured temperatures of the 3-color pyrometer are within 200 K, with same correlation to global temperatures from high speed camera. While average global temperature remains steady under changes in forcing frequency and inlet air velocity fluctuation frequency, the temperature fluctuation is primarily shown to increase with increase in modulation levels of mean air velocity.
Jongguen Lee, Ph.D. (Committee Chair)
Peter Disimile, Ph.D. (Committee Member)
Awatef Hamed, Ph.D. (Committee Member)
82 p.
Aerospace Materials
Pyrometry; Combustion Dynamics; Fuel-rich flames; Soot temperature; Diagnostics

Recommended Citations

Citations

  • Cakmakci, A. (2015). Spatiotemporal Distribution of Soot Temperature for Fuel-Rich Flames under Unsteady Inlet Airflow Conditions [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1427812554

    APA Style (7th edition)

  • Cakmakci, Arda. Spatiotemporal Distribution of Soot Temperature for Fuel-Rich Flames under Unsteady Inlet Airflow Conditions. 2015. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1427812554.

    MLA Style (8th edition)

  • Cakmakci, Arda. "Spatiotemporal Distribution of Soot Temperature for Fuel-Rich Flames under Unsteady Inlet Airflow Conditions." Master's thesis, University of Cincinnati, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1427812554

    Chicago Manual of Style (17th edition)

ucin1427812554
666
© 2015, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.