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脈動燃燒干燥換熱特性分析與實
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and Experiment of Heat Transfer in Helmholtz Pulse Combustion Dryer
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    摘要:

    利用Helmholtz型脈動燃燒器，進(jìn)行了脈動氣流與黃銅球間的對流換熱實驗,，應(yīng)用集總熱容法確定了不同頻率脈動氣流與黃銅間的對流換熱系數(shù),，探究了脈動頻率對脈動燃燒干燥過程中氣流與物料間對流換熱系數(shù)的影響，建立了努塞爾數(shù)與脈動頻率間的關(guān)聯(lián)式,，并對耐火土顆粒在脈動燃燒氣流中的干燥過程進(jìn)行了預(yù)測，實驗結(jié)果與預(yù)測值吻合較好,。

    Abstract:

    In order to further understand the heat transfer characteristics of pulse combustion drying process, a Helmholtz type pulsing burner was used to carry out heattransfer experiments. Through a convective heat-transfer experiment between pulsing air and brass ball by the method of lumped heat capacity, the convective heat-transfer coefficient in different frequencies pulse air was determined, and the impact of pulse frequency on the convective heat-transfer coefficient between material and airflow was investigated, the criterion correlation between Nu and pulse frequency was also established. By using the established correlation, the drying process of the refractory clay particles in the pulse combustion was forecasted. Compared with the experimental value, the results showed that the predicted values and the experimental results matched well.

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路倩倩,楊德勇,郎芝花,劉相東.脈動燃燒干燥換熱特性分析與實[J].農(nóng)業(yè)機(jī)械學(xué)報,2010,41(3):123-127. and Experiment of Heat Transfer in Helmholtz Pulse Combustion Dryer[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(3):123-127.

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