Wind Model around a High Building for a Helicopter Flight Simulator

Abstract

Flight simulation tests of a fire helicopter for high buildings are conducted under the cooperative research between the National Aerospace Laboratory and the Tokyo Fire Department. One of the most important factors to realize a fire helicopter is the heavily turbulent wind around buildings which may adversely affect the safety and efficiency during fire fighting. In simulating the mission of the fire helicopter, it is required to generate the wind in real time depending on both time and location of the measuring point. When the height of the building is assumed to be infinite, it is feasible to make such wind by using two dimensional discrete vortex method. It is also shown that this method is applicable to the building whose height is not so longer than its width.