[1]于燕,张军,陈广闯,等.分段数对生长管过饱和环境特征的影响[J].东南大学学报(自然科学版),2018,48(2):226-231.[doi:10.3969/j.issn.1001-0505.2018.02.006]
 Yu Yan,Zhang Jun,Chen Guangchuang,et al.Effects of sections on characteristics of supersaturation in growth tube[J].Journal of Southeast University (Natural Science Edition),2018,48(2):226-231.[doi:10.3969/j.issn.1001-0505.2018.02.006]
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分段数对生长管过饱和环境特征的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
48
期数:
2018年第2期
页码:
226-231
栏目:
能源与动力工程
出版日期:
2018-03-20

文章信息/Info

Title:
Effects of sections on characteristics of supersaturation in growth tube
作者:
于燕张军陈广闯徐俊超闾荔钟辉
东南大学能源热转换及其过程测控教育部重点实验室, 南京 210096
Author(s):
Yu Yan Zhang Jun Chen Guangchuang Xu Junchao Lü Li Zhong Hui
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
细颗粒物 多段式生长管 过饱和度 传热传质
Keywords:
fine particulate matters multi-section growth tube supersaturation heat and mass transfer
分类号:
TK16
DOI:
10.3969/j.issn.1001-0505.2018.02.006
摘要:
为了研究多段式生长管中水汽相变条件下不同构建方式及初始参数等操作条件下,生长管分段数对形成的过饱和环境特征的影响,利用变物性参数传热传质模型对多段式生长管中2种过饱和构建方式,即低温饱和气流与高温热水相接触(方式1)和高温饱和气体与低温冷水相接触(方式2)及不同初始参数下形成的过饱和度分布进行了计算,分析不同分段数下形成的过饱和度分布均匀性和过饱和度水平.计算结果表明:在温差(进气温度与管壁温度)为35 K,生长管总长度为120 cm时,方式1下生长管的分段数为10时过饱和度分布均匀性较好且过饱和度水平较高;方式2下生长管的分段数为3时过饱和度分布均匀性较好且过饱和度水平较高,方式2下生长管的分段数为10时过饱和度均匀性最佳,但整体过饱和水平下降;要达到均匀化和过饱和度水平较高的过饱和度分布,随着生长管总长度的增加, 2种方式下生长管的分段数都要有所增加;而随着温差的增加,方式1的分段数需稍有增加,方式2的分段数则需减少.
Abstract:
To study the effects of the multi-section growth tube on the uniformity of the distribution of supersaturation from different creating methods, the distribution of supersaturation was predicted by a heat and mass transfer model with variable physical parameters under the condition of vapor phase transition and the uniformity of the distribution of the supersaturation was analyzed. Two creating methods for supersaturation are as follows: method 1: the saturated air at was low temperature meeting with warmer water. Method 2: the saturated air at the high temperature meeting with colder water. The calculated results demonstrate that when the temperatures difference(the temperature between the air inflow and the wall-water)is 35 K and the whole length of the growth tube is 120 cm, the uniformity of the supersaturation distribution is better and the level is higher from method 1 when the number of sections is 10. And from method 2, the quasi-uniform and high-level supersaturation distribution is achieved when the number of sections is 3 and when the number of sections is 10, the optimum uniformity is obtained but the level of supersaturation is declined. To acquire uniform and high-level supersaturation distribution, with increase of the growth tube whole length, the number of sections has a slight enlargement for both methods. What’s more, with increase of the temperature difference, the number of sections requires a little more for method 1 but less for method 2.

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备注/Memo

备注/Memo:
收稿日期: 2017-09-14.
作者简介: 于燕(1990—),女,博士生;张军(联系人),男,博士,教授,博士生导师,junzhang@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51576043).
引用本文: 于燕,张军,陈广闯,等.分段数对生长管过饱和环境特征的影响[J].东南大学学报(自然科学版),2018,48(2):226-231. DOI:10.3969/j.issn.1001-0505.2018.02.006.
更新日期/Last Update: 2018-03-20