基于流声分解法的并列双圆柱流声数值模拟
发布时间：2019-06-01 15:09
【摘要】：为了研究低流速下多体绕流激噪声,提出一种基于流声分解法的双圆柱绕流激噪声预报方法。在自主开发的通用流体力学数值模拟软件GTEA基础上,编写了双圆柱绕流噪声计算程序。采用单圆柱绕流噪声计算,验证了流声分解法的正确性和可靠性,对不同圆心距系数(圆柱间中心距与圆柱直径之比)S为1.1、1.7、3.0的并列双圆柱绕流和噪声进行了数值计算。研究表明:并列双圆柱绕流流场可分成单钝体绕流、混合绕流、稳定流3种形式,3种绕流形式对应3种不同声场,混合绕流的声场呈现多极子分布与单圆柱偶极子噪声分布有明显不同,流场分布形式直接决定声场分布形式。
[Abstract]:In order to study the multi-body flow-induced noise at low velocity, a flow-induced noise prediction method based on flow acoustic decomposition method is proposed. Based on the general fluid mechanics numerical simulation software GTEA, a program for calculating the noise of flow around a double cylinder is compiled. The correctness and reliability of the flow sound decomposition method are verified by using the calculation of flow noise around a single cylinder. The flow and noise around a juxtaposed double cylinder with different center distance coefficients (the ratio of the center distance between cylinders to the diameter of a cylinder) S is 1.1, 1.7 and 3.0 are calculated. The results show that the flow field around a parallel double cylinder can be divided into three forms: single blunt body flow, mixed flow and steady flow, and the three flow forms correspond to three different sound fields. The multipole distribution of the sound field around the mixed flow is obviously different from that of the single cylinder dipole noise distribution, and the distribution form of the flow field directly determines the distribution form of the sound field.
【作者单位】： 哈尔滨工程大学动力与能源工程学院;北京民用飞机技术研究中心;
【基金】：国家自然科学基金面上资助项目(51479038);国家自然科学基金青年科学基金资助项目(51206031)
【分类号】：O357.5
[Abstract]:In order to study the multi-body flow-induced noise at low velocity, a flow-induced noise prediction method based on flow acoustic decomposition method is proposed. Based on the general fluid mechanics numerical simulation software GTEA, a program for calculating the noise of flow around a double cylinder is compiled. The correctness and reliability of the flow sound decomposition method are verified by using the calculation of flow noise around a single cylinder. The flow and noise around a juxtaposed double cylinder with different center distance coefficients (the ratio of the center distance between cylinders to the diameter of a cylinder) S is 1.1, 1.7 and 3.0 are calculated. The results show that the flow field around a parallel double cylinder can be divided into three forms: single blunt body flow, mixed flow and steady flow, and the three flow forms correspond to three different sound fields. The multipole distribution of the sound field around the mixed flow is obviously different from that of the single cylinder dipole noise distribution, and the distribution form of the flow field directly determines the distribution form of the sound field.
【作者单位】： 哈尔滨工程大学动力与能源工程学院;北京民用飞机技术研究中心;
【基金】：国家自然科学基金面上资助项目(51479038);国家自然科学基金青年科学基金资助项目(51206031)
【分类号】：O357.5
【共引文献】
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