轴流风力灭火机的发展及其结构讨论

Development of Axial-flow Pneumatic Fire Extinguishers and Discussion about Their Structure

近几年来,轴流风力灭火机的研发已从设计构想的提出、风机性能实验台搭建、数值分析模型的建立迈向了对不同结构下轴流风力灭火机性能讨论和设计改进阶段。在其结构形式上,目前主要对单级动叶、对旋及动静叶单级结构三种布置形式下轴流风力灭火机全压及出口风速的优劣进行实验和内流分析。结果表明,动静叶单级结构能够有效地提高轴流风力灭火机全压,但出口风速还有待提高。

In recent years, the research and development of axial-flow pneumatic fire extinguishers has shifted from proposing design concept, constructing fan performance test benches and establishing numerical models for simulation analysis to per- formance discussion and design improvement stage of axial-flow pneumatic fire extinguishers with different structures. Seen from the structural form, experiments and inner flow analysis are conducted of total pressure and outlet wind speed of axial- flow pneumatic fire extinguishers with three structural arrangements, i.e. single stage with rotor blade, counter-rotating struc- ture and single stage with both rotor and stator blades. The result shows that the structure of single stage with both rotor and stator blades can effectively improve the total pressure of axial-flow pneumatic fire extinguishers but that the outlet speed re- mains to he improved.