Experimental heat exchanger performance in a thermoacoustic prime mover
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Authors
Castro, Nelson C.
Subjects
Acoustics
Thermoacoustic
Thermoacoustics Heat Transport
Heat Exchanger
Thermoacoustic Prime Mover
Thermoacoustic
Thermoacoustics Heat Transport
Heat Exchanger
Thermoacoustic Prime Mover
Advisors
Hofler, Thomas J.
Atchley, Anthony A.
Date of Issue
1993-12
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
This thesis investigates the experimental heat exchanger performance in a neon filled thermoacoustic prime mover. The experimental approach is to measure the waveform and spectrum of the acoustic oscillations, as well as the relevant temperatures for heat exchangers of 0.257, 0.569, and 0.82 cm in length. A temperature gradient is established across the stack by submerging the cold heat exchanger and cold end tube in liquid nitrogen and keeping the hot heat exchanger and hot end tube at ambient temperature. Measurements are made at various mean gas pressures ranging from 1.5 to 50 kPa and for various effective positions of the stack in the standing wave. Acoustic pressure amplitudes as high as 29% of mean gas pressure are generated by the prime mover. The primary experimental controls over heat exchanger performance are the various heat exchanger lengths mentioned above, and the control of the thermal penetration depth, which decreases with increasing mean gas pressure. Results indicated that the prime mover can generate peak-to-peak displacement amplitudes that are much longer than the heat exchanger lengths
Type
Thesis
Description
Series/Report No
Department
Physics
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
85 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.