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논문 기본 정보

자료유형
학술저널
저자정보
Kuan Chen (유타대학교)
저널정보
한국에너지기후변화학회 에너지기후변화학회지 에너지기후변화학회지 Vol.5 No.2
발행연도
2010.10
수록면
44 - 57 (14page)

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초록· 키워드

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Two identical TA (ThermoAcoustic) lasers were constructed, tested, and characterized for the generation and manipulation of high-amplitude acoustic waves from heat. Pyrex glass tubes with one open end and ceramics used in automobile catalytic converters were employed to fabricate the TA lasers. The ceramic stack in each TA laser was heated by NiCr (nichrome) resistance heater wire at one end, and cooled at the other end by radiation and natural convection of atmospheric air. Generated acoustic energy and sound waves were analyzed for different power supply rates and laser position arrangements. Changes in wave amplitude and phase difference due to triggered excitation and cross talking of the two lasers were investigated. Also tested and characterized were the focusing and synchronization of the two TA laser outputs to manipulate the acoustic energy intensity. It was found the sound waves generated by a pair of identical TA lasers were almost 180 degrees out of phase when the openings of the two lasers were very close to each other, resulting in much lower sound energy level at the focusing point. When the two lasers were far apart, the phase difference between the sound waves of the two lasers varied with time. Amplitudes of both sound waves increased slightly when the two laser output waves were in phase.

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Abstract
1. Introduction
2. TA laser construction and experiments
3. Results and Discussions
4. Conclusions
References

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