富冰层释冷中沟道生长模拟研究

王 玉乔
华北电力大学能源动力与机械工程学院

摘要


基于焓的格子Boltzmann方法和多孔介质随机生成方法，建立了在冰浆富冰层释冷过程中的沟道生长模型，并验证了模型的可靠性。研究了富冰层渗透率、冰颗粒粒径和初始冰温对沟道生长的影响。结果表明：渗透率对沟道纵向生长影响最显著；冰颗粒粒径对沟道整体生长的影响较小，但对局部生长影响较大；初始冰温对沟道生长影响相对较弱。富冰层渗透率、冰颗粒粒径和初始冰温对沟道生长的影响均为非线性，富冰层渗透率大于1.2×10-3mm2时，渗透率越大，沟道生长越缓慢；在融冰释冷15s后，冰颗粒粒径为0.75mm时，沟道以0.15mm/s的速度横向增长，冰颗粒粒径为1mm时，沟道以0.1mm/s的速度横向增长，冰颗粒粒径为1.25mm时，沟道以0.3mm/s的速度横向增长，粒径对沟道纵向影响较小。

关键词


富冰层释冷；焓；富冰层；沟道生长

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参考


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DOI: http://dx.doi.org/10.12361/2661-3506-07-04-143689

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