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首页> 外文会议>Fuel injection and sprays, 2010 >Prediction of Liquid and Vapour Penetration of Early-Injection Diesel Sprays
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Prediction of Liquid and Vapour Penetration of Early-Injection Diesel Sprays

机译：早期喷射柴油喷雾的液体和蒸气渗透率的预测

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摘要

Transient liquid and vapour penetration of Diesel sprays is numerically investigated for conditions corresponding to early-injection timings; this injection approach can be followed since it allows sufficient fuel-ambient mixing avoiding NO_x and soot-forming combustion. Model validation takes place against experimental data available for injection into an optically accessible constant volume chamber using a single-hole injector nozzle. A parametric analysis on the effect of ambient temperature and density, injection duration, multiple injection strategy and nozzle hole diameter is performed to enlighten the development of the injected sprays for various early-injection strategies. The model is found to predict reasonably well the experimental trends both for steady-state and transient injection events. Accurate prediction of the influence of the injection parameters, particularly during the initial liquid spray formation, which strongly affects the transient spray development, may assist engine developers to the design of more efficient combustion systems.
机译：数值研究了柴油喷雾剂的瞬态液体和蒸气渗透，以发现与早期喷射正时相对应的条件。可以采用这种喷射方法，因为它可以进行充分的燃料环境混合，从而避免了NO_x和形成烟灰的燃烧。模型验证是根据可使用单孔进样器喷嘴注入光学上可访问的恒定体积腔室的实验数据进行的。对环境温度和密度，喷射持续时间，多次喷射策略和喷嘴孔直径的影响进行参数分析，以启发各种早期喷射策略的喷射喷雾的发展。发现该模型可以很好地预测稳态和瞬态注入事件的实验趋势。准确预测喷射参数的影响，尤其是在初始液体喷雾形成过程中，这会严重影响瞬态喷雾的发展，这可能有助于发动机开发人员设计更高效的燃烧系统。

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