transom window

1. The results showed that transom window types have much influence on airflow field inside the greenhouse, and that airflow distribution differs distinctively. The average velocity varies about 30%, while the maximum velocity does not vary much in three window types.
   模拟结果表明：顶窗配置形式对温室内自然通风影响较大，室内流场差异明显，平均流速最大相差30%以上，但气流最大速度相差不大。

noun

1. a window above a door that is usually hinged to a horizontal crosspiece over the door

   Synonym:    transomfanlight