【摘要】：單罐填充床蓄熱是一種重要的高溫蓄熱方式,而在充放熱過程中不發(fā)生黏性指進現(xiàn)象,保持斜溫層的穩(wěn)定是蓄熱系統(tǒng)是否可行的重要依據(jù)。本文對充放熱過程中熔鹽的流動方向、熔鹽的密度和黏度對黏性指進的影響進行了詳細的理論分析。結(jié)果表明熔鹽自上而下流動,熱熔鹽置換冷熔鹽時,熔鹽流速不能超過臨界流速;冷熔鹽置換熱熔鹽時,熔鹽流速要大于臨界流速才能維持斜溫層的穩(wěn)定。熔鹽自下而上流動,熱熔鹽置換冷熔鹽時,必然會發(fā)生黏性指進;冷熔鹽置換熱熔鹽時,沒有流速的限制,斜溫層能自然保持穩(wěn)定。
[Abstract]:Single tank packed bed heat storage is an important way of high temperature heat storage, but there is no viscous fingering phenomenon in the process of heat filling and releasing. Keeping the stability of inclined temperature layer is an important basis for the feasibility of heat storage system. In this paper, the flow direction of molten salt, the influence of density and viscosity of molten salt on viscosity fingering are analyzed in detail. The results show that the flux of molten salt flows from top to bottom. When hot melt salt is replaced by cold molten salt, the flow rate of molten salt can not exceed the critical velocity, and the velocity of molten salt should be higher than the critical flow rate in order to maintain the stability of inclined temperature layer when cold molten salt is replaced by hot melt salt. When molten salt flows from bottom to top, when hot melt salt is replaced by cold molten salt, viscosity will inevitably come into being, and when cold molten salt is replaced by hot melt salt, the oblique temperature layer will naturally remain stable without the restriction of flow rate.
【作者單位】： 東莞理工學院廣東省分布式能源系統(tǒng)重點實驗室;
【基金】：國家自然科學基金項目(No.51306039) 廣東省自然科學基金項目(No.2015A030313655)
【分類號】：TM615

【相似文獻】

相關(guān)期刊論文 前1條

1 李維仲;董波;宋永臣;;水平通道內(nèi)黏性指進現(xiàn)象LBM模擬[J];大連理工大學學報;2012年03期

相關(guān)會議論文 前1條

1 袁士寶;陳月明;;分形方法在多孔介質(zhì)黏性指進中的應用[A];中國力學學會學術(shù)大會'2005論文摘要集（下）[C];2005年

，

本文編號：2413675