广东第二师范学院学报
廣東第二師範學院學報
엄동제이사범학원학보
Journal of Guangdong Education Institute
2013年
3期
53~57
,共null页
横掠管束 凝结换热 准则关联式
橫掠管束 凝結換熱 準則關聯式
횡략관속 응결환열 준칙관련식
flow across finned pipe bundles; condensation heat transfer; correlations
翅片管束发生凝结换热对换热效果影响重大.选定含湿混合气体(温度75~94℃和水蒸气质量分数12%~20%),对该气体横掠翅片管束的凝结换热进行了实验研究.通过对实验数据的分析,得到混合气体进口温度、混合气体流速、不凝性气体质量分数对凝结换热过程的影响,并拟合得到凝结换热Nu数的准则关系式.
翅片管束髮生凝結換熱對換熱效果影響重大.選定含濕混閤氣體(溫度75~94℃和水蒸氣質量分數12%~20%),對該氣體橫掠翅片管束的凝結換熱進行瞭實驗研究.通過對實驗數據的分析,得到混閤氣體進口溫度、混閤氣體流速、不凝性氣體質量分數對凝結換熱過程的影響,併擬閤得到凝結換熱Nu數的準則關繫式.
시편관속발생응결환열대환열효과영향중대.선정함습혼합기체(온도75~94℃화수증기질량분수12%~20%),대해기체횡략시편관속적응결환열진행료실험연구.통과대실험수거적분석,득도혼합기체진구온도、혼합기체류속、불응성기체질량분수대응결환열과정적영향,병의합득도응결환열Nu수적준칙관계식.
Abstract: The occurrence of condensation has significant effect on heat transfer of finned tube bundles. In this essay, the heat transfer experiments are carried out to study the moist air flowing and condensing across the finned tube bundles and, with the range of temperature 75-94℃ and vapor mass fraction is 12%~20%. According to the experimental data, the mixed gas imports temperature, velocity, and the non-condensable gas mass fraction has notable impact on the condensation heat transfer process. And the criterion equation of Nu numbers are fitting for this process.