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首页> 外文会议>US Combustion Meeting; 20070325-28; San Diego,CA(US) >Composition and temperature measurements of evaporating propanol-acetone droplets
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Composition and temperature measurements of evaporating propanol-acetone droplets

机译：蒸发丙醇-丙酮液滴的组成和温度测量

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Time-dependent temperatures and compositions within individual fiber-supported droplets initially from about 2 to 3 mm in diameter were investigated. In the experiments, droplets were composed of mixtures of 1-propanol and acetone. The droplets evaporated in room air, where the air was heated by placing an electrically heated coil underneath the droplets. The experiments employed thin optical fibers to carry light from a UV-VIS light source into and out of a droplet. The time-dependent UV absorption spectrum of the liquid between the fiber ends was measured using a spectrometer coupled to one of the fibers. This spectrum yielded real-time information on the composition of the liquid. Droplet temperatures were simultaneously measured using a thermocouple that was immersed into the liquid. Results demonstrate that droplet evaporation follows a multi-stage process and that acetone is preferentially gasified from a droplet.
机译：研究了直径随时间变化的温度和成分，这些温度和成分最初在直径约2至3毫米的单个纤维负载小滴中。在实验中，液滴由1-丙醇和丙酮的混合物组成。液滴在室内空气中蒸发，在此处通过在液滴下方放置电加热线圈来加热空气。实验使用细光纤将来自UV-VIS光源的光带入或带出液滴。纤维末端之间的液体随时间的紫外线吸收光谱是使用耦合到其中一根纤维的光谱仪测量的。该光谱产生有关液体成分的实时信息。使用浸入液体中的热电偶同时测量液滴温度。结果表明，液滴蒸发遵循多阶段过程，丙酮优先从液滴中气化。

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