甲板风对舰船空气尾流影响的数值研究

Numerical Research for Effect of WOD on Ship Airwake

利用CFD仿真方法对不同甲板风风速和风向角条件下的SFS2、LHA-1及CVN-73空气尾流场进行数值模拟。研究表明,舰船空气尾流场随甲板风风速的变化符合雷诺数独立性原则,这一规律表明,对于感兴趣的风向角,只需要计算一个风速即可,因此可有效减少舰船空气尾流场研究中的工作量。但是,随着风向角的变化,舰船空气尾流场会发生剧烈改变,对于感兴趣的风向角工况必须逐一进行计算。对比分析结果显示,算例中0°~15°的风向角范围是适合舰载直升机起降操作的较理想风向角。研究结果明确了甲板风对舰船空气尾流场特性的影响,可为后续舰船空气尾流场的研究提供参考,为直升机安全操作包线的制定和固定翼飞机的安全着舰提供理论依据。

In order to investigate the influence of WOD on ship airwake, the CFD simulation method is used to simulate the airwake of SFS2, LHA-1 and CVN-73 under different WOD speeds and angles. The study shows that the changing of ship airwake flowfield with the WOD speed conforms to the independence principle of Reynolds. The rule shows that it is necessary to calculate only one wind speed for each wind angle of interesting. But with the changing of wind angle, the ship airwake flowfield changes severely. Each condition should be calculated for the wind angle of interesting. The comparison and analysis result concludes that the WOD angles from 0° to 15° are the ideal range for shipboard helicopters launch and recovery operations. It clarifies the influence of WOD on the characteristics of ship airwake flowfield, which provides the theoretical reference for development of shipboard helicopter operating envelopes and finding of optimal approach paths for fixed wing aircraft.