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A Low-power Liquid-fuelled Burner Using a Novel Atomization Concept

机译：使用新型雾化概念的低功率液体燃料燃烧器

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摘要

The design of and experimental results for a low-power heating oil burner, operating between 1.25 and 5.1 kW with exhaust gas emissions within the normative regulations for domestic usage, are presented. In contrast to common domestic heating oil burners, the atomization and combustion sections are spatially separated to allow the implementation of a novel atomization concept for low-power liquid-fuelled burners proposed in a previous study. The main working principle for spray generation is the secondary atomization of a droplet chain impinging on a pin downstream. Through pulse-width modulation (PWM) of the droplet generator, modulation of the spray flowrate over a wide range with constant spray quality was achieved. Phase-Doppler anemometry measurements under non-reacting conditions were performed to obtain the droplet size distribution of the spray. Three model liquids were used to determine the influence of liquid properties on the droplet size distribution. The Sauter mean diameter (SMD) values obtained for all liquids and operation parameters studied are in the range of 10% of the primary droplet diameter, which is 30 mu m for the setup in this study.
机译：介绍了低功率取暖油燃烧器的设计和实验结果，该燃烧器在1.25到5.1 kW之间工作，并且废气排放符合家用规范。与普通的家用取暖油燃烧器相比，雾化和燃烧部分在空间上分开，可以实现先前研究中提出的针对低功率液体燃料燃烧器的新型雾化概念。产生喷雾的主要工作原理是撞击在下游销钉上的液滴链的二次雾化。通过液滴发生器的脉冲宽度调制（PWM），可以在恒定的喷雾质量的情况下在宽范围内调节喷雾流量。在非反应条件下进行相多普勒风速测定，以获得喷雾的液滴尺寸分布。使用三种模型液体来确定液体性质对液滴尺寸分布的影响。所有液体和所研究的操作参数的苏特平均直径（SMD）值在一次液滴直径的10％范围内，在本研究中，初始液滴直径为30微米。

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