The Proceedings of the Symposium on Stirlling Cycle

Influence of He-Ar mixed ratio on performance of the loop-type thermoacoustic engine

Satomi NAKAMOTO, Mineo TANAKA, Tohru HATA, Tomio NISHITANI, Yoshio MAR ...

Article type: Article
Pages 123-124
Published: October 15, 2002
Released on J-STAGE: June 19, 2017

DOIhttps://doi.org/10.1299/jsmessc.2002.6.123

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We have made a simple loop-type thermoacoustic engine that will be used for a refrigerator and examined pressure amplitude of oscillation along the loop tube changing a mixed ratio of He-Ar mixture in the loop tube. We have tried to find the efficiency of energy conversion in the stack by assuming that the acoustic wave could be expressed as the superimposition of the standing wave component and the progressing wave component that attenuates linearly along the loop. It is found that the efficiency changes remarkably depending on the mixed ratio of the mixture.

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Basic Characteristics of a Thermal Compressor for Space Application (II)

Akihiro KUSHINO, Hiroyuki SUGITA, Wei DAI, Youichi MATSUBARA

Article type: Article
Pages 125-126
Published: October 15, 2002
Released on J-STAGE: June 19, 2017

DOIhttps://doi.org/10.1299/jsmessc.2002.6.125

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We report the performance of a workflow amplifier, aiming for the next-generation space cryocoolers. The progressive-wave-type thermal compressor with solid displacers was manufactured and examined using 1.5MPa-compressed He gas. An amplification ratio of 1.6 was measured at the driving frequency of 24.4Hz, which is higher than the resonance frequency of this system, 23.5Hz. We separately performed numerical simulations and found a consistent behavior.

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Development of a Thermoacousitc Recorder

Masayasu HATAZAWA, Yoshitoki SEO

Article type: Article
Pages 127-130
Published: October 15, 2002
Released on J-STAGE: June 19, 2017

DOIhttps://doi.org/10.1299/jsmessc.2002.6.127

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A recorder with thermoacoustic sound wave generator is described. It was developed for introduction to "Thermoacousitc phenomena" and exhibition of the 99' youngster's science festival in Chiba. It is constructed of a resonance tube, which has 7 holes on its side wall for generating one octave sound waves, from C_1 of 65.4Hz to C_2 of 130.8Hz, stack and heat exchangers. It is ascertained that generated sound wave frequency is influenced by temperature inside the resonance tube and sound pressure level is affected by hole position on its side wall. It sufficient operated and is useful for the youngsters to enlighten the science interest.

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Thermoacoustic Stirling Engine using a resonance tube

Yusuke TASHIRO, Tetsushi BIWA, Yuki UEDA, Taichi YAZAKI, Uichiro MIZUT ...

Article type: Article
Pages 131-132
Published: October 15, 2002
Released on J-STAGE: June 19, 2017

DOIhttps://doi.org/10.1299/jsmessc.2002.6.131

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A thermoacoustic Stirling Engine with a high efficiency needs both the traveling wave phase and high acoustic impedance. However, the acoustic impedance of a freely traveling plane wave is fixed at the ρδ, resulting in significant viscous energy losses due to high acoustic velocities. So we focus on a position in a resonance tube, where both a high acoustic impedance and a traveling wave phase are formed. We put a regenerator stacked with many screen meshes into this paticular position and externally imposed steep temperature gradients along the regenerator. We succeed in the amplification and attenuation of sound intensity depending on the sign of the temperature gradient.

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[title in Japanese]

Article type: Appendix
Pages App5-
Published: October 15, 2002
Released on J-STAGE: June 19, 2017

DOIhttps://doi.org/10.1299/jsmessc.2002.6.App5

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Practical model Stirling engines which stimulate Intellectual curiosity

Masataka KUGIMIYA

Article type: Article
Pages 133-134
Published: October 15, 2002
Released on J-STAGE: June 19, 2017

DOIhttps://doi.org/10.1299/jsmessc.2002.6.133

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Production of model Stirling engine used for science camp

Kenzo KODAMA, Fumio NUMAJIRI, Hiroshi MURAKAMI, Masakuni KAWADA

Article type: Article
Pages 135-136
Published: October 15, 2002
Released on J-STAGE: June 19, 2017

DOIhttps://doi.org/10.1299/jsmessc.2002.6.135

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[title in Japanese]

Article type: Appendix
Pages App6-
Published: October 15, 2002
Released on J-STAGE: June 19, 2017

DOIhttps://doi.org/10.1299/jsmessc.2002.6.App6

CONFERENCE PROCEEDINGS FREE ACCESS

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