流动诱导空腔振荡预测方法的改进

被引:9
作者
田春
张强
李青
机构
[1] 南京航空航天大学航空宇航学院
[2] 西安飞机设计研究所 南京
[3] 南京
[4] 西安
关键词
噪声预测; 空腔; 压力振荡;
D O I
暂无
中图分类号
V211.7 [实验空气动力学];
学科分类号
0801 ; 080103 ; 080104 ;
摘要
详细地阐述了流动诱导空腔振荡的机理 ,并对小尺寸空腔 (长深比 L/ D=4)做了反复的实验。基于本文的实验结果和国外飞机弹舱噪声的飞行数据及空腔的风洞实验数据 ,并结合流动诱导空腔振荡的机理合理改进了预测流动诱导空腔振荡各阶模态的频率方程 ,以及预测自由剪切层自激振荡第一阶和第三阶模态的 1 / 3倍频程声压级的工程算法 ,结果表明 ,采用改进后的计算方法对流动诱导空腔振荡噪声的预测具有较高的精度 ,并能用于工程计算
引用
收藏
页码:173 / 177
页数:5
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