摘要
对浸没燃烧建立冷态实验系统,用空气代替烟气、空气管压力代替燃烧室压力,研究了浸没燃烧室相对压力波动极限幅度与浸没深度、空气流量、鼓泡孔直径、鼓泡孔分布之间的关系。利用SPSS软件拟合出燃烧室相对压力波动极限幅度的数学模型,并在热态实验工况下对模型的准确度进行了验证。冷态实验表明,不同浸没深度下的空气管相对压力波动极限幅度随空气流量的变化趋势基本一致,最大极限幅度随空气流量的增大而变大,最小极限幅度(负值)随空气流量的增大而减小。在相同空气流量下,空气管相对压力波动极限幅度随浸没深度的变化趋势基本一致,最大极限幅度随浸没深度的增加明显降低,最小极限幅度随浸没深度的增加明显变大。浸没深度一定时,最大极限幅度随鼓泡管直径的增加而变大,最小极限幅度随鼓泡管直径的增加而减小。在相同的空气流量下,最大极限幅度随鼓泡充满度的增加而减小,最小极限幅度随鼓泡充满度的增加而变大。建立的燃烧室相对压力波动极限幅度的数学模型准确度高,可反映相对压力波动极限幅度与各相关变量的关系。
An experimental system of submerged combustion in cold state was established,air instead of flue gas,air tube pressure instead of combustion chamber pressure. The relationship between the relative pressure fluctuation limit amplitude of the submerged combustion chamber and the immersion depth,air flow rate,bubbling pore diameter and bubbling pore distribution was studied. The mathematical model of the relative pressure fluctuation limit amplitude of the combustion chamber was fitted by SPSS software,and the accuracy of the model was verified under the hot experimental conditions. The cold state experiments show that the variation trends of the relative pressure fluctuation limit amplitude of air tubes with the air flow rate are basically the same at different immersion depths.The maximum limit amplitude increases with the increase of the air flow rate. The minimum limit amplitude( negative value) decreases with the increase of the air flow rate. The variation trends of the relative pressure fluctuation limit amplitude of air tubes with immersion depths are basically the same at the same air flow rate. The maximum limit amplitude significantly decreases with the increase of the immersion depths.The minimum limit amplitude significantly increases with the increase of the immersion depths. When the immersion depth is constant,the maximum limit amplitude becomes larger as the diameter of the bubble pore increases,and the minimum limit amplitude decreases as the diameter of the bubbling pore increases. At the same air flow rate,the maximum limit amplitude decreases as the bubbling fullness increases,and the minimum limit amplitude becomes larger as the bubbling fullness increases. The mathematical model of the relative pressure fluctuation limit amplitude in combustion chamber has high accuracy,which can reflect the relationship between the relative pressure fluctuation limit amplitude and each related variable.
作者
杨洋
史永征
郭萧宇
刘蓉
王浩
WANG Yang;SHU Yongaheng;GUO Xoaoyu;LIU Rong;WANG Hao
出处
《煤气与热力》
2019年第6期34-39,10043,共7页
Gas & Heat
关键词
浸没燃烧
燃烧室压力波动
空气流量
浸没深度
鼓泡孔直径
鼓泡孔分布
submerged combustion
pressure fluctuation in combustion chamber
air flow rate
immersion depth
bubbling pore diameter
bubbling pore distribution
