AERODYNAMIC FORCES ACTING ON AN ALBATROSS FLYING ABOVE SEA-WAVES  

作　　者：盛其虎 吴德铭 张亮 

机构地区：[1]College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, P.R.China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2005年第9期1222-1229,共8页应用数学和力学（英文版）

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina(No.50279004)andtheNationalHi-TechResearchandDevelopmentProgramofChina(863Program)(No.2002AA516010)

摘　　要：Numerical investigation on the dynamic mechanism has been made for an albatross to fly effectively near sea surface. Emphasizing on the effect of the sea wave, the albatross is simplified as a two-dimensional airfoil and the panel method based on the potential flow theory is employed to calculate the wave effect on the aerodynamic forces. The numerical results have been presented for the states of flying at different constant speeds with constant heights above sea level, and flying at different constant speeds with the combined oscillations of pitching and free heaving. It is shown that the albatross flight efficiency depends on not only the speed and height of flight but also the wave amplitude and the wavelength. The albatross benefits by wave effect to get thrust, so as to reduce the resistance in the circumstances of rough sea.Numerical investigation on the dynamic mechanism has been made for an albatross to fly effectively near sea surface. Emphasizing on the effect of the sea wave, the albatross is simplified as a two-dimensional airfoil and the panel method based on the potential flow theory is employed to calculate the wave effect on the aerodynamic forces. The numerical results have been presented for the states of flying at different constant speeds with constant heights above sea level, and flying at different constant speeds with the combined oscillations of pitching and free heaving. It is shown that the albatross flight efficiency depends on not only the speed and height of flight but also the wave amplitude and the wavelength. The albatross benefits by wave effect to get thrust, so as to reduce the resistance in the circumstances of rough sea.

关 键 词：UNSTEADY AERODYNAMICS panel method wave effect ALBATROSS 

分 类 号：V211.4[航空宇航科学与技术—航空宇航推进理论与工程]