科技通报
科技通報
과기통보
Bulletin of Science and Technology
2015年
11期
138-142
,共5页
恒壁温%水平翅片%湿空气%数值模拟%对流传热特性
恆壁溫%水平翅片%濕空氣%數值模擬%對流傳熱特性
항벽온%수평시편%습공기%수치모의%대류전열특성
constant wall temperature%horizontal fin tube%wet air%numerical simulation%convective heat transfer property
对恒壁温条件下翅片管外湿空气的冷却过程进行了数值模拟和试验研究。研究结果表明：湿空气中水蒸汽的冷凝对空气流动的影响较小；湿空气流过单支翅片管的进、出口温降随进口空气温度的升高而增加，随进口湿空气相对湿度和速度的增加而降低；对流传热的Nu数随Re数的增加而增加，随进口空气相对湿度的增加而降低。
對恆壁溫條件下翅片管外濕空氣的冷卻過程進行瞭數值模擬和試驗研究。研究結果錶明：濕空氣中水蒸汽的冷凝對空氣流動的影響較小；濕空氣流過單支翅片管的進、齣口溫降隨進口空氣溫度的升高而增加，隨進口濕空氣相對濕度和速度的增加而降低；對流傳熱的Nu數隨Re數的增加而增加，隨進口空氣相對濕度的增加而降低。
대항벽온조건하시편관외습공기적냉각과정진행료수치모의화시험연구。연구결과표명：습공기중수증기적냉응대공기류동적영향교소；습공기류과단지시편관적진、출구온강수진구공기온도적승고이증가，수진구습공기상대습도화속도적증가이강저；대류전열적Nu수수Re수적증가이증가，수진구공기상대습도적증가이강저。
The cooling property of wet air flow on the outside of horizontal finned tube was numerical simulated and tested under the condition of constant wall temperature. The research results showed that the influence of the vapor condensation on the air flow was very weak. Simultaneously, the temperature drop of the wet air between the inlet and outlet increased with the inlet air temperature, and decreased with the inlet air relative humidity and velocity. The Nusselt number of convective heat transfer increased with the Reynolds number, and decreased with the inlet air relative humidity.
