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中文摘要：
斯特林发动机的燃烧特性直接影响到整机性能．采用可视化试验台架，利用高速摄影机拍摄以乙醇为燃料的斯特林发动机燃烧火焰图片，分析了乙醇燃料引射式燃烧的火焰脉动和形态的特点；根据燃烧方式与火焰RGB值的对应关系，分析了引射空气量的变化对斯特林发动机燃烧方式的影响．结果表明，加入适量引射空气可提高火焰的稳定性，降低火焰长度，增大火焰张角，使燃烧室火焰充满度提高，并且乙醇火焰燃烧方式转变为半预混合、半扩散式．
英文摘要：
The performance of a Stirling engine is closely related with the quality of combustion. Visual test bench is adopted, by using a high-speed camera to photograph combustion flame, the effect of gas ejector on the stability and the shape of ethanol flame was analyzed. According to the relationship between RGB and combustion mode in different ways, the change of combustion mode when ejected air is participating in combustion was studied. The results show that, with suitable amount of ejecting air, the stability of the flame is improved apparently, and the length of the flame is shortened, the fullness of the flame is in- creased significantly, and the mode of combustion becomes half pre-mixed and half-diffusion combustion.
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Combustion, performance and emission characteristics of a DI diesel engine fueled with ethanol-biodi
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