Wind tunnel test for aerodynamics of wing-in-ground craft flying near smooth/wavy surface
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摘要: 为研究波浪水面地效飞机气动特性的变化规律,在Φ3.2 m低速风洞开发了新的试验技术,以模拟地效飞机飞越1 m实际浪高水面时的气动特性。研制了具有一定上下升沉和前后平移行程的固定波浪地板,模拟螺旋桨带动力地效飞机在起飞、巡航、着水等状态飞经波峰、波谷、中立位置等相位时的气动性能。在现有水平活动地板基础上,采用在水平活动带表面设置2个周期波形的方式研制了活动波浪地板,通过活动波浪带的周期性循环运行,模拟地效飞机不断飞越波浪的情况,其模拟相似性更高,可以更加准确地模拟地效飞机与波浪之间的相对运动。利用固定水平地板、固定波浪地板和活动波浪地板装置模拟空中、近平静水面和近波浪水面飞行状态,获得了地效飞机无动力和螺旋桨带动力条件的气动特性风洞试验结果。研究结果表明:螺旋桨带动力和地板对地效飞机起飞和着水状态气动性能具有很强的耦合影响,并非简单的叠加关系;地效飞机在波浪的不同相位上方时,升阻性能和俯仰力矩均存在较强变化,影响飞行平稳性。Abstract: In order to investigate the aerodynamics of the wing-in-ground craft flying near wavy surface the dedicated wavy ground floor and moving wavy belt are devised to simulate the real water wave with the height of one meter. The wavy ground floor is capable of varying its vertical and horizontal position. The moving wavy belt which contains two waves on the belt is suitable for the wind tunnel test of the wing-in-ground craft flying over all the phases of the wave. The wind tunnel test has been carried out which simulates the wing-in-ground craft flying in the sky, near smooth surface and wavy surface by means of flat ground floor, wavy ground floor and moving wavy belt, respectively. The wind tunnel test results show that propellers and the floor have a coupling effect on the taking-off and landing aerodynamics of the wing-in-ground craft, instead of simple superposition. What is more, the aerodynamic loads of the wing-in-ground craft fluctuate dramatically over the various phases of the wave.
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Key words:
- wing-in-ground craft /
- smooth surface /
- wavy surface /
- wind tunnel test /
- moving wavy belt
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表 1 主要试验参数及其模拟的飞行状态
Table 1. Flight condition and corresponding wind tunnel test parameters
模拟状态 风速/(m·s–1) 电机转速/(r·min–1) 桨叶角 拉力系数 前进比 起飞 32 12100 –5° 0.273 0.513 着水 40 12000 –5° 0.170 0.647 巡航 50 8950 –10° 0.028 1.086 -
[1] 李先达. 实用地效飞行器技术发展述评[J]. 前沿科学,2011,5(3):22-31. doi: 10.3969/j.issn.1673-8128.2011.03.005LI X D. Review on key technologies to develop practical WIG craft[J]. Frontier Science,2011,5(3):22-31. doi: 10.3969/j.issn.1673-8128.2011.03.005 [2] 屈秋林,刘沛清,秦绪国. 地效飞行器波浪地面飞行气动性能数值研究[J]. 航空学报,2007,28(6):1327-1333. doi: 10.3321/j.issn:1000-6893.2007.06.009QU Q L,LIU P Q,QIN X G. Numerical research on aerodynamic characteristics of WIG craft flying over wavy ground[J]. Acta Aeronautica et Astronautica Sinica,2007,28(6):1327-1333. doi: 10.3321/j.issn:1000-6893.2007.06.009 [3] 乐挺,王立新. 地效飞机的纵向稳定性和气动布局特点研究[J]. 飞行力学,2007,25(3):5-8. doi: 10.3969/j.issn.1002-0853.2007.03.002YUE T,WANG L X. A study on longitudinal stability and configu-ration characteristics of wing-in-ground effect craft[J]. Flight Dyna-mics,2007,25(3):5-8. doi: 10.3969/j.issn.1002-0853.2007.03.002 [4] 秦绪国,刘沛清,屈秋林. 翼型波浪水面巡航地面效应数值模拟[J]. 北京航空航天大学学报,2011,37(3):295-299, 304. doi: 10.13700/j.bh.1001-5965.2011.03.001QIN X G,LIU P Q,QU Q L. Numerical simulation on aerodynamics of airfoil flying over wavy water surface[J]. Journal of Beijing University of Aeronautics and Astronautics,2011,37(3):295-299, 304. doi: 10.13700/j.bh.1001-5965.2011.03.001 [5] 邢福,吴宝山,朱仁庆. 地效翼气动力特性的数值预报[J]. 船舶力学,2004,8(6):19-30. doi: 10.3969/j.issn.1007-7294.2004.06.003XING F,WU B S,ZHU R Q. Investigation on numerical prediction of WIG’s aerodynamics[J]. Journal of Ship Mechanics,2004,8(6):19-30. doi: 10.3969/j.issn.1007-7294.2004.06.003 [6] 顾璇. 近地/海运动过程中的空气动力学分析[D]. 哈尔滨: 哈尔滨工程大学, 2009.GU X. Aerodynamic analysis on near-ground/sea motion[D]. Harbin: Harbin Engineering University, 2009. [7] 杨美,杨韡,杨志刚. 地效翼地面粘性效应风洞试验研究[J]. 空气动力学学报,2015,33(1):82-86. doi: 10.7638/kqdlxxb-2013.0002YANG M,YANG W,YANG Z G. Wind tunnel test of ground viscous effect on wing aerodynamics[J]. Acta Aerodynamica Sinica,2015,33(1):82-86. doi: 10.7638/kqdlxxb-2013.0002 [8] 周丹杰,曹德一,东海宁. 国内外地效飞行器实验研究[J]. 战术导弹技术,2010(3):32-36. doi: 10.16358/j.issn.1009-1300.2010.03.002ZHOU D J,CAO D Y,DONG H N. Experimental research on Wing-in-ground-effect vehicle[J]. Tactical Missile Technology,2010(3):32-36. doi: 10.16358/j.issn.1009-1300.2010.03.002 [9] HIEMCKE C. NACA 5312 in ground effect: Wind tunnel and panel code studies[R]. AIAA-97-2320, 1997. doi: 10.2514/6.1997-2320 [10] 陈新, 单雪雄. 三维机翼掠海飞行时非定常气动力和兴波的数值计算[C]//2003空气动力学前沿研究研讨会论文集. 北京: 中国宇航出版社, 2003: 132-137. [11] 杨炯,梁鉴,李征初. 活动地板关键技术研究[J]. 实验流体力学,2008,22(4):68-71. doi: 10.3969/j.issn.1672-9897.2008.04.015YANG J,LIANG J,LI Z C. Key technical research on developing moving belt ground proximity[J]. Journal of Experiments in Fluid Mechanics,2008,22(4):68-71. doi: 10.3969/j.issn.1672-9897.2008.04.015 [12] 李征初,杨炯,梁鉴,等. Φ3.2 m风洞活动地板系统研制[J]. 实验流体力学,2011,25(4):89-93. doi: 10.3969/j.issn.1672-9897.2011.04.017LI Z C,YANG J,LIANG J,et al. Development of moving belt floor in Φ3.2 m wind tunnel[J]. Journal of Experiments in Fluid Mech-anics,2011,25(4):89-93. doi: 10.3969/j.issn.1672-9897.2011.04.017