CIESC Journal ›› 2008, Vol. 59 ›› Issue (10): 2601-2607.
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PU Wenhao;ZHAO Changsui;XIONG Yuanquan;LIANG Cai;CHEN Xiaoping;LU Peng;FAN Chunlei
Online:
Published:
蒲文灏;赵长遂;熊源泉;梁财;陈晓平;鹿鹏;范春雷
Abstract:
A new frictionalkinetic model for dense phase pneumatic conveying of pulverized coal in a horizontal pipe at a high pressure was establishedThis model treated the kinetic and frictional stresses of particles additivelyThe kinetic stress was modeled by using the kinetic theory of granular flowThe friction stress proposed by Srivastava et al. was modified to account for dense phase pneumatic conveyingThe simulation results included profiles of gas and particle phase axial velocity, profiles of solids concentration, profiles of the turbulence intensity of gas and particle phase, as well as the value of pressure gradientThe formation and motion process of the settled layer were verifiedAn experiment was also carried out to validate the accuracy of the simulation results, which showed that the predictions of pressure gradient were in good agreement with the experimental data.
Key words: 摩擦应力, 气力输送, 密相, 颗粒动理学
摩擦应力,
摘要:
针对加压密相气力输送,对现有的颗粒静摩擦力模型进行适当修正,并将其与颗粒动理学理论相结合,建立了可以描述加压密相气力输送的气固湍流流动状况的多相流模型。该模型充分考虑了颗粒间碰撞和摩擦力作用,以及气相和颗粒团湍流脉动之间的相互作用。采用该模型对水平管内加压密相气力输送进行了三维数值模拟研究,模拟得到了气相和固相的速度、浓度和湍流强度分布,以及压降梯度的变化规律,再现了颗粒沉积层的形成和运动的动态过程。并进行了加压密相煤粉气力输送试验研究,预测的压降梯度与试验测量结果相符合。
关键词: 摩擦应力, 气力输送, 密相, 颗粒动理学
PU Wenhao, ZHAO Changsui, XIONG Yuanquan, LIANG Cai, CHEN Xiaoping, LU Peng, FAN Chunlei. Numerical simulation of dense pneumatic conveying of pulverized coal in horizontal pipe at high pressure[J]. CIESC Journal, 2008, 59(10): 2601-2607.
蒲文灏, 赵长遂, 熊源泉, 梁财, 陈晓平, 鹿鹏, 范春雷. 水平管加压密相煤粉气力输送数值模拟 [J]. 化工学报, 2008, 59(10): 2601-2607.
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https://hgxb.cip.com.cn/EN/Y2008/V59/I10/2601
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