灭火飞机投放试验地面附着密度测量方法研究

基于水体投放的扩散特性和工程试验的要求,设计了一种灭火飞机量化落水地面附着特性的测量方法。该方法主要包含地面数据采集的试验设备、矩阵布局和精度评估3个方面,考虑到工程试验费用的有限性,根据飞机投水的计算流体力学仿真计算结果,采用纸杯地面布阵的方法进行落水质量采集,综合数值模拟和线性插值等数学方法,给出了适用于大型水陆两栖飞机投水任务系统性能评估的试验矩阵方案和投水精度评估的具体方式,并通过与国外特定型号的投放试验数据绘图结果的比对,验证了测量方法的有效性。

Study on Measurement Method of Ground Adhesion Density of Fire Extinguishing Aircraft Launching Test

Based on the diffusion characteristics of water body and the requirement of engineering test, a measuring method of quantitative ground adhesion characteristics of fire extinguishing aircraft was designed. This method mainly includes three aspects: test equipment for ground data acquisition, matrix layout and accuracy evaluation. Considering the limitation of engineering test cost, the CFD simulation results of aircraft water delivery were presented. The paper cup ground array method was used to collect the falling water quality, and the mathematical methods such as numerical simulation and linear interpolation were synthesized. To evaluate the accuracy of water delivery for large amphibious aircraft, an experimental matrix scheme and a specific method were presented. The validity of the measurement method was verified by comparing the results of the test data drawn with foreign specific models.