波浪条件下地效翼型气动力的环量控制研究

doi:10.16183/j.cnki.jsjtu.2021.384

摘要/Abstract

摘要：

波浪海面气流环境相对复杂,严重影响了地效飞行器巡航过程中的稳定性与安全性.针对波浪条件下的地效翼型,应用数值方法分析了不同海况波浪形状和不同飞行攻角对翼型气动特性的影响,进一步研究了定常吹气和周期吹气方法对地效下的环量控制翼型气动力影响规律.计算结果表明:波浪海面地效下,翼型升力系数随波浪周期性变化,波浪的波高较高、波长较短,翼型攻角较大时升力系数波动的幅度较大;通过与波浪相对运动相同周期的吹气环量控制方法,可以有效地控制波浪海况下翼型升力系数的波动,增强地效飞行器的稳定性与安全性.

关键词: 地面效应, 波浪海面, 气动特性, 环量控制, 吹气动量系数

Abstract:

The interaction of airflow and sea waves seriously affects the flight stability and cruising safety of ground effect vehicles. The influence of different sea states and different angles of attack were analyzed numerically on the aerodynamic characteristics of the airfoil under ground effect of wavy wall. The influence of the constant blowing and periodic blowing methods was further studied on the aerodynamic force of the airfoil under ground effect. The simulation results show that the lift coefficient of the airfoil changes periodically with the wave under the wavy ground wall. The amplitude of the lift coefficient fluctuation is larger with the increasing of wave height and angle of attack, or the decreasing of wavelength. Applying the circulation control method for periodic blowing in the same period as the relative motion of the waves can effectively weaken the fluctuation of the airfoil lift coefficient under wavy sea conditions and improve the flight stability and safety of ground effect vehicles.

Key words: ground effect, wavy wall, aerodynamic characteristic, circulation control, blowing momentum coefficient

中图分类号:

V211.41

刘浩, 孙建红, 孙智, 陶洋, 王德臣, 刘光远. 波浪条件下地效翼型气动力的环量控制研究[J]. 上海交通大学学报, 2022, 56(8): 1101-1110.

LIU Hao, SUN Jianhong, SUN Zhi, TAO Yang, WANG Dechen, LIU Guangyuan. Circulation Control of Airfoil Aerodynamic Force Under Ground Effect of Wavy Wall[J]. Journal of Shanghai Jiao Tong University, 2022, 56(8): 1101-1110.

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飞行器名称	巡航速度/(km·h^-1)	平均气动弦长/m
里海怪物	555	19.12
鹈鹕	490	30.50
小鹰	231	9.67

算例	海况等级	浪高/ m	风级	波速/ (m·s^-1)	周期/ s	波长/ m	风速/ (m·s^-1)
Case1	3	0.7	4	7.2	3.8	18	4.7
Case2	4	1.4	5	10.0	5.4	34	6.3
Case3		1.4	4	7.2	3.8	18	4.7
Case4		0.7	5	10.0	5.4	34	6.3

算例	K₀	K₁	K₂	R²
Case1	0.726 8	0.010 9	0.519 0	0.997 8
Case2	0.879 3	0.093 4	0.254 7	0.993 9
Case3	0.675 2	0.080 7	0.510 9	0.994 5
Case4	0.991 7	0.123 1	0.096 9	0.997 5