舰面流场中起动位置对旋翼瞬态气弹响应影响

赵嘉琛; 韩东; 于雷

doi:10.13224/j.cnki.jasp.2020.01.017

舰面流场中起动位置对旋翼瞬态气弹响应影响

doi: 10.13224/j.cnki.jasp.2020.01.017

基金项目: 旋翼空气动力学重点实验室开放基金(RAL20180201-1); 国家自然科学基金面上项目(11972181);2018年研究生创新基地(实验室)开放基金(KFJJ20180106);江苏高校优势学科建设工程

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出版历程
- 收稿日期: 2019-07-31
- 刊出日期: 2020-01-28

Influence of starting position of ship surface flow field on rotor transient aeroelastic response

National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics,College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

摘要

摘要: 为研究舰面流场中直升机起动位置对旋翼瞬态气弹响应影响,通过CFD方法模拟得到舰面流场速度分布信息。旋翼动力学建模采用非线性准定常气动模型和中等变形梁假设,结合不同起动位置对动力学方程进行求解。结果表明:直升机起动位置越靠近舰艏和左舷,桨叶负向挥舞越大。在甲板中心1 m范围内,最靠近舰艏和左舷的位置负向最大位移可达159%旋翼半径,中心处负向最大位移仅为85%旋翼半径,源于靠近舰艏和左舷位置垂向气流变化梯度明显高于舰艉和右舷。研究表明舰面流场垂向气流变化梯度对旋翼瞬态气弹响应影响明显,改变直升机起动位置能有效降低旋翼瞬态气弹响应。
- 直升机 /
- 舰面流场 /
- 瞬态气弹响应 /
- 起动位置 /
- 气流变化梯度
Abstract: In order to study the influence of starting position of helicopter on rotor transient aeroelastic response in ship surface flow field, the velocity distribution information of ship surface flow field was simulated by CFD method. Nonlinear quasi-steady aerodynamic model and moderately deformed beam assumption were used in rotor dynamics modeling, and the dynamic equations were solved by combining different starting positions. The results showed that if the starting position of helicopter was closer to the bow and the port side, the negative swing of blade was greater. Within 1 m of the deck center, the maximum negative displacement near the port side of the bow can reach 159% of the rotor radius, while the maximum negative displacement at the center was only 85% of the rotor radius. The vertical airflow gradient near the port side and the bow was obviously higher than that near the starboard side and the stern. The results show that the vertical airflow gradient has a significant effect on the transient aeroelastic response of the rotor. Changing the starting position of helicopter can effectively reduce the transient aeroelastic response of the rotor.
- helicopter /
- ship surface flow field /
- transient aeroelastic response /
- starting position /
- airflow gradient

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