Исследование свойств смесей дизельного топлива с углеродными нанотрубками и характеристик его распыливания

Показатели топливной экономичности и токсичности отработавших газов дизельных двигателей можно улучшить путем добавления углеродных нанотрубок в нефтяное дизельное топливо. Углеродные нанотрубки, применяемые в качестве перспективной наноразмерной присадки к дизельному топливу, обладают высокой теплопроводностью и большим отношением площади поверхности к объему. Теплофизические свойства указанных топлив зависят от состава смесей. Проанализированы теплофизические свойства углеродных нанотрубок и их смесей с дизельным топливом. Добавление углеродных нанотрубок в дизельное топливо оказывает незначительное влияние на его динамическую вязкость и теплопроводность. С использованием численных моделей смоделирован процесс распыливания и испарения дизельного топлива с различным содержанием углеродных нанотрубок в камере сгорания постоянного объема. Точность вычислений подтверждена хорошим совпадением расчетных данных с экспериментальными. Моделирование распыливания смесей показало, что длина струи линейно зависит от содержания углеродных нанотрубок в дизельном топливе. Увеличение содержания углеродных нанотрубок в смеси приводит к уменьшению среднего диаметра капель по Заутеру и угла раскрытия конуса струи. Наличие углеродных нанотрубок в дизельном топливе несущественно влияет на содержание в нем паров топлива.

Литература

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