Martinez_MS_THESIS_FINAL_10.12.2019.pdf (13.17 MB)

EXPERIMENTAL STUDY OF A LOW-FREQUENCY THERMOACOUSTIC DEVICE

Download (13.17 MB)
thesis
posted on 25.11.2019, 19:01 by Ariana G Martinez
An experimental study of a low-frequency transcritical thermoacoustic device has been conducted at Purdue University's Maurice J. Zucrow Laboratories. The purpose of this study was to characterize the thermoacoustic response of transcritical R-218 and asses it's feasibility for energy extraction and waste heat removal. This rig operated as a standing-wave configuration and achieved pressure amplitudes as high as 690 KPa (100 psi) at a temperature difference of 150 K and a bulk pressure of 1.3 P/Pcr (3.43 MPa). To the author's knowledge, this is the highest ever thermoacoustic pressure amplitude achieved in a non-reacting flow. The thermoacoustic response was characterized by varying temperature difference and bulk pressure parametrically. The effect of resonator length was characterized in a set of tests where resonator length and bulk pressure was varied parametrically at a single temperature difference. Finally, the feasibility for energy extraction was assessed in a set of tests which characterized the ability of the working fluid to pump itself through a recirculation line with check valves. This set of tests showed that the working fluid was able to create self-sustained circulation by inducing a pressure differential across the check valves with the thermoacoustic response. This circulation was induced while still maintaining a significant pressure amplitude, demonstrating promising results as a feasible method for energy extraction and waste heat removal.

Funding

Rolls-Royce

History

Degree Type

Master of Science in Aeronautics and Astronautics

Department

Aeronautics and Astronautics

Campus location

West Lafayette

Advisor/Supervisor/Committee Chair

Dr. Stephen D. Heister

Additional Committee Member 2

Dr. Carlo Scalo

Additional Committee Member 3

Dr. Timothee Pourpoint

Additional Committee Member 4

Dr. Mario Migliorino

Licence

Exports