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猪粪流变特性与表观粘度模型研究
  • ISSN号:1000-1298
  • 期刊名称:农业机械学报
  • 时间:2013.11.11
  • 页码:133-144
  • 分类:S216.4[农业科学—农业机械化工程;农业科学—农业工程] TK6[动力工程及工程热物理—生物能]
  • 作者机构:[1]同济大学现代农业科学与工程研究院,上海200092
  • 相关基金:国家自然科学基金资助项目(51078287)
  • 相关项目:高固含率原料厌氧消化池搅拌强度对发酵效果的作用机制
中文摘要:

采用旋转粘度计测定了不同含固率、温度条件下新鲜猪粪的流变曲线,并对含固率、温度对猪粪流变特性的影响进行了分析。结果表明:猪粪为假塑性流体且符合幂率方程。表观粘度随含固率的增大呈现增大趋势,但温度对其影响不大;表观粘度与含固率曲线存在临界点,可以作为非牛顿流体(猪粪)近似视为牛顿流体的标准;表观粘度与剪切速率曲线也存在一个临界D值,提出搅拌死区可以从剪切速度角度来定义。同时对温度影响猪粪表观粘度的机理进行了讨论;最后对表观粘度与含固率、剪切速率的关系进行了多元非线性回归分析,建立了表观粘度樽剥日圳合特集徂辑为涉殛非牛市丽'7斋体f猪娄、的T芦诗计和优化根供了甬执形式的物忡参麴姜系式.

英文摘要:

Rheological curves of pig manure with different solid holdup and temperatures were measured by a rotational viscometer. The effects of solid holdup and temperatures on the rheological behaviors were studied. The results indicated that pig manure behaved like pseudoplastic fluid and followed the power law model. The apparent viscosity showed an "upward growth" trend with the increase of solid holdup, but the temperature had little influence on it. There were some critical points on viscosity and solid curves, and they could be used as the standard of non-Newtonian fluid (pig manure) regarded as Newtonian approximately. There were also some critical D values on viscosity and shear rate curves, proposing that they could be used as definition of dead zone. The mechanism for temperature affecting apparent viscosity was discussed. Finally, the relationship between analyzed apparent viscosity and solid holdup and shear rate with the help of multiple nonlinear regression were analyzed, and a mathematical model was established and fittted well with experimental results, which provided the relationship of physical parameters in the functional form for process design and optimization involving non-Newtonian fluid (pig manure)

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期刊信息
  • 《农业机械学报》
  • 中国科技核心期刊
  • 主管单位:中国科学技术协会
  • 主办单位:中国农业机械学会 中国农业机械化科学研究院
  • 主编:任露泉
  • 地址:北京德胜门外北沙滩一号6号信箱
  • 邮编:100083
  • 邮箱:njxb@caams.org.cn
  • 电话:010-64882610 64867367
  • 国际标准刊号:ISSN:1000-1298
  • 国内统一刊号:ISSN:11-1964/S
  • 邮发代号:2-363
  • 获奖情况:
  • 荣获中国科协优秀期刊二等奖,1997~2000年连续4年获中国科协择优资金,被列入中国期刊方阵,中国期刊方阵“双效”期刊
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  • 美国化学文摘(网络版),英国农业与生物科学研究中心文摘,荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版),中国北大核心期刊(2000版)
  • 被引量:42884