스택의 채널 수에 다른 열음향파의 특성 비교 연구
A Comparative Study on the Characteristics of Thermoacoustic Waves by the Stack Channel Number
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The conversion of solar energy into acoustic waves is experimentally studied. Measurements were made on the Sound Pressure Level (SPL), onset time and the temperature gradient across the stack, with the Cell Per Square Inch (CPSI) of stack changed. A pyrex resonance tube is used with a honey-comb structure ceramic stack along with Ni-Cr and Cu wires. An AL1 acoustical analyzer was used to measure the SPL and frequency of acoustic waves whereas K-type thermocouples were hired to estimate temperature gradients. As a result, when the supply electric power was 25 W, maximum SPLs of 104.1 dB, 109.4 dB and 112.8 dB were detected for the stacks of 200, 300 and 400 CPSI and their respective stack positions of 70mm, 60mm and 50mm from the closed end.
Abstract
The conversion of solar energy into acoustic waves is experimentally studied. Measurements were made on the Sound Pressure Level (SPL), onset time and the temperature gradient across the stack, with the Cell Per Square Inch (CPSI) of stack changed. A pyrex resonance tube is used with a honey-comb structure ceramic stack along with Ni-Cr and Cu wires. An AL1 acoustical analyzer was used to measure the SPL and frequency of acoustic waves whereas K-type thermocouples were hired to estimate temperature gradients. As a result, when the supply electric power was 25 W, maximum SPLs of 104.1 dB, 109.4 dB and 112.8 dB were detected for the stacks of 200, 300 and 400 CPSI and their respective stack positions of 70mm, 60mm and 50mm from the closed end.
참고문헌 (9)
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- 박성식, "태양열 적용을 위한 열음향 레이저의 특성 비교 연구", 한국태양에너지학회 논문집, 32(2), pp.105~1102 (2012), 한국태양에너지학회[DOI]
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