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논문 기본 정보

자료유형
학술저널
저자정보
권영필 이주원 이동훈 (서울산업대학교)
저널정보
대한설비공학회 설비공학논문집 空氣調和·冷凍工學 論文集 제9권 제2호
발행연도
1997.5
수록면
221 - 228 (8page)

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A strong combustion-driven sound from a surface burner made of a perforated metal fiber plate for premixed gas was investigated to clarify the physical mechanism of its generation. A simple model was developed for the acoustic power generation in terms of the heat transfer response function and the acoustic impedance of the burner. The acoustic impedance of the perforated metal fiber placed on the open exit was measured and the heat release response of the burner to the oscillating flow associated with the acoustic disturbance was expressed in terms of a response function. It was found that the power is generated by the heat release in response to the downstream particle velocity, in contrast to the upstream velocity in the case of the Rijke oscillation driven by a heater placed in the lower half of a columm with upstream flow. The measured frequencies of the oscillation were in agreement with the estimated resonance frequencies and their excitation was varied with the combustion conditions. For the same fuel rate, the excited frequency increases with the air ratio if it is low but decreases with the ratio if not so low. Such frequency characteristics were explained by assuming a heat release response function with a time constant and it was shown that the excited frequency decreases as the time constant increases.

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Abstract

1. 서론

2. 연소진동음의 발생조건

3. 연소 진동음의 주파수 특성

4. 열전달 응답함수

5. 결론

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