王文虎,BREARD Cyrille,孙一峰.缝翼凹腔挡板气动性能和降噪效果数值研究[J].民用飞机设计与研 究,2019(4):1-6WANG Wenhu,BREARD Cyrille,SUN Yifeng.[J].Civil Aircraft Design and Research,2019,(4):1-6.
缝翼凹腔挡板气动性能和降噪效果数值研究
  
DOI:10.19416/j.cnki.1674-9804.2019.04.001
中文关键词:前缘缝翼  凹腔挡板  气动噪声  SNGR
英文关键词:slat  cove seal  aerodynamic noise  SNGR
基金项目:
作者单位
王文虎,BREARD Cyrille,孙一峰 上海飞机设计研究院上海201210 
中文摘要:采用定常RANS方法计算缝翼凹腔挡板气动性能,并进一步采用SNGR方法快速评估缝翼凹腔挡板降噪效果。首先利用30P30N三段翼型的风洞试验数据验证数值方法的可靠性;其次参照AIAA国际会议发表论文中的标准前缘缝翼及其凹腔挡板几何模型,对无挡板、短挡板和长挡板三种构型的气动性能和噪声特性进行了对比。计算结果表明:1)短挡板和长挡板不会改变失速迎角,在失速迎角下带来了的升力损失仅为0.2%和0.7%;2)挡板带来的升力损失主要是由挡板上下表面及主翼下翼面前缘的压力分布差异导致的,而压力分布差异又源于挡板对缝翼凹腔分离涡形态的影响;3)相比无挡板构型,短挡板和长挡板构型均能降低缝翼凹腔及缝道附近的自噪声、剪切噪声和总噪声,且长挡板构型的降噪效果比短挡板构型更为显著。
英文摘要:Based on the RANS (Renolds Averaged Navier-Stokes) results of aerodynamic characteristics, SNGR (Stochastic Noise Generation and Radiation) method is utilized to fast evaluate the aeroacoustic effects of slat cove seals. The numerical method is first validated by wind tunnel test data of the 30P30N three-element airfoil. Then the aerodynamic and aeroacoustic performances are compared for the no seal configuration, the short seal configuration as well as the long seal configuration. Numerical results show: 1) the short/long seal brings no inferior influence on the stall angle of attack, and only 0.2%/0.7% correspongding loss of lift coefficients; 2) the lift loss are due to the lift coefficient distribution changes on the upper and lower surfaces of the seal, as well as on the lower leading edge of the main wing, all of which comes from the seals’ influences on the shape of the vortex in the slat cove;3) compared to the no seal configuration, the self noise, the shear noise and the total noise in the vicinity of slat, are reduced by both the short seal and the long seal, especially the long seal.
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