检索结果-南通市图书馆

Experimental Investigation of Spray Evaporation in Turbulent Flow in Countercurrent Humidifier

Journal of Shanghai Jiaotong university(Science) 2004年第1期9卷 19-25页

作者：王玉璋刘永文翁史烈 Key Lab. for Power Machinery and Eng. of the Ministry of Education Shanghai Jiaotong Univ.

The process in the countercurrent humidifier of HAT cycle involves the evaporation of atomized liquids in a turbulent environment. To allow an optimization of such process and provide data for the validation of numerical calculation, the spray evaporation in a countercurrent air stream was studied experimentally. Measurements were taken for different flow parameters, such as airflow rate and liquid flow rate in order to provide reliable data. Phase-Doppler anemometry (PDA) was applied to obtain the spatial change of the droplet size spectrum in the flow field and to measure droplet size-velocity correlations. These local measured profiles of droplet mean velocities, velocity fluctuations and droplet mean diameters were obtained by averaging over all droplet size classes. Moreover, DualPDA signal processing allows accurate determination of the droplet mass flux and local concentration, from which the global evaporation rates could also be determined. These local temperature profiles were measured using the thermocouple and acquired by data acquisition system based on virtual instrument (VI) technology.

关键词： spray phase-Doppler anemometer (PDA) turbulence evaporation droplet velocity droplet size humidifier

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improvement in an Interpolation Algorithm Concerning Multiple Factors to Predict Drift Distance

Improvement in an Interpolation Algorithm Concerning Multipl...

引用

第三届国际计算机及计算技术农业应用学术会议

作者： Wang Xiu~1 Ma Wei~1 Ji Jianbing~1 1 National Engineering Research Center for Information Technology in Agriculture 100097 Beijing Mao Yijin~(1 2) 2 China Agricultural University 100083 Beijing He Ming~3 3 University of Science and Technology of Beijing Beijing 100097 China

＜正＞Research on droplet drift distance is one important part of precision agriculture,there are many factors influencing drift distance such as environment conditions and physical property of droplets group. According to previous research results based on other agricultural experts,those factors involving temperature,relative humidity of environment,velocity of wind,droplet sizes,discharge height from nozzle and droplet initial velocity play an essential role in determining how far droplet drift *** Heping Zhu in Ohio State University have designed one quick method to predict droplet drift distance by assuming that each relations between those factors and drift distance is absolutely ***,error generating from assumption itself is obvious and it is entirely necessary to reduce any error caused by designed algorithm as much as *** analysis, such error could be reduced remarkably if partial improvement is made in Dr Heping Zhu’s interpolation *** this paper,relation between droplet size and drift distance is changed to be cubic because of its strong non-linear ***,we develop a software implemented with this new interpolation method,and then both of the results founded on the same but special combination of input variables are compared,and the result reveals that this new interpolation tally better with experiment data than the origin one and relative error based on those special combination of input variables are reduced obviously.

关键词： linear interpolation cubic droplet size drift distance VC++

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：