火墙式火炕内烟气流动特性数值模拟分析

对比火墙式火炕和传统火炕内部烟气流动特性、烟气温度分布、炕面温度分布，分析两种炕体结构的热工性能，并为农村火炕的进一步优化设计提供理论依据。利用火灾动力学模拟软件FDS5．3应用大涡模拟方法的场模型、辐射模型模拟分析传统火炕和火墙式火炕的炕面温度、炕内烟气温度分布与烟气流动特性，得到相关云图和温度分布。火墙式火炕的炕面温度比传统型火炕炕面温度高10℃左右，向室内散热量大，在炕火墙和灶同时工作时，炕头中心温度达到85℃。火墙式火炕的炕体结构优于传统火炕，但仍然存在炕头过热的问题，有待进一步优化。

Numerical Simulation Analysis of the Smoke Flowing Characteristics within Huo-Kang with Hot-wall

The smoke＇s flow characteristics, temperature distribution inside a Huo-Kang with and without hot-wall, and the surface temperature distribution of the Huo-Kang are analyzed. Differences between the traditional Huo-Kang and the Huo-Kang with hot-wall are compared. Their thermal performances within the structures are expounded, which provide theory basis for better design of Huo-Kang in village. By using fire dynamics simulation software FDS5.3, the large eddy simulation method is applied to the field of model; radiation model simulation is used to analyze the surface temperature, smoke tempera- ture distribution and flow characteristics for the traditional Huo-Kang with and without hot-wall; and relevant cloud and temperature distribution are provided. The surface temperature of the Huo-Kang with hot- wall is about 10 ℃ higher than the traditional Huo-Kang; heat dissipating capacity of the Huo-Kang with hot-wall is bigger, when the hot-wall and the Huo-Kang are working together; the central surface temperature of the head of the Huo-Kang with hot-wall is some 85 ℃. We get the conclusion that the structure of the Huo-Kang with hot-wall is superior to the traditional Huo-Kang, but it still has problem that the surface of head of Huo-Kang is too hot, it needs to improve.