A Study on the Improvement of Combustion Performance by Air Injection
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概要
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In this paper, a new method using edge tone nozzles has been introduced for the purpose of improving three combustion characteristics, that is, the strength, stability and flame shape. Then the following subjects were examined by using several nozzles which are different in dimensions; (1) acoustic characteristics of nozzles and interactions between acoustic waves and combustion, (2) improvements in combustion strength and stable combustion region, (3) intensifying and stabilizing mechanisms, and (4) necessary strength of high frequency disturbance. The obtained results show that this method is effective to improve the above three characteristics simultaneously. Particularly, it has been found that flame shapes are altered by the secondary flow toward nozzle which is generated by the nozzle warping. The zigzag movements of combustion moles, which are caused by high frequency turbulence above 10 kHz, improve the strength and stability, and pressure variations over 60 mmAq are required to obtain high combustion efficiency.
- 一般社団法人日本機械学会の論文
著者
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TANAKA Yutaka
School of Engineering, Okayama University
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Shimamoto Yuzuru
School Of Engineering Kyoto University
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Shimamoto Yuzuru
School Of Engineering Okayama University
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Tanaka Yutaka
School Of Engineering Okayama University
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