WRF野外火灾模型中的火灾边界点火
Ignition from a Fire Perimeter in a WRF Wildland Fire Model
摘要：
目前的WRF火灾模型在给定的时间从给定的着火点开始火灾。我们希望在给定的时间从给定的火力周界开始模型。然而，燃料平衡和大气状态取决于火灾的历史。这项工作的目的是创建一个近似的人工历史的火灾的基础上给定的火灾周长和时间和一个近似的点火点和时间。然后，回放火灾历史建立合理的燃料平衡，并将热通量输出到大气模式中，这使得大气环流得以发展。然后，大气-火灾耦合模型接管。在本初步调查中，假设周界为凸形或星形，根据点火点到周界的距离计算火灾区域内的点火时间。模拟结果表明，理想的例子，火灾可以继续在一个自然的方式从周边。可能的扩展包括用于更一般的周界的算法，以及从周界向后运行火灾模型以创建更真实的历史。所使用的模型扩展了WRF-Fire，可从openwfm.org获得。
英文摘要：
The current WRF-Fire model starts the fire from a given ignition point at a given time. We want to start the model from a given fire perimeter at a given time instead. However, the fuel balance and the state of the atmosphere depend on the history of the fire. The purpose of this work is to create an approximate artificial history of the fire based on the given fire perimeter and time and an approximate ignition point and time. Replaying the fire history then establishes a reasonable fuel balance and outputs heat fluxes into the atmospheric model, which allow the atmospheric circulation to develop. Then the coupled atmosphere-fire model takes over. In this preliminary investigation, the ignition times in the fire area are calculated based on the distance from the ignition point to the perimeter, assuming that the perimeter is convex or star-shaped. Simulation results for an ideal example show that the fire can continue in a natural way from the perimeter. Possible extensions include algorithms for more general perimeters and running the fire model backwards in time from the perimeter to create a more realistic history. The model used extends WRF-Fire and it is available from openwfm.org.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
