【摘要】：為了研究低流速下多體繞流激噪聲,提出一種基于流聲分解法的雙圓柱繞流激噪聲預(yù)報(bào)方法。在自主開(kāi)發(fā)的通用流體力學(xué)數(shù)值模擬軟件GTEA基礎(chǔ)上,編寫了雙圓柱繞流噪聲計(jì)算程序。采用單圓柱繞流噪聲計(jì)算,驗(yàn)證了流聲分解法的正確性和可靠性,對(duì)不同圓心距系數(shù)(圓柱間中心距與圓柱直徑之比)S為1.1、1.7、3.0的并列雙圓柱繞流和噪聲進(jìn)行了數(shù)值計(jì)算。研究表明:并列雙圓柱繞流流場(chǎng)可分成單鈍體繞流、混合繞流、穩(wěn)定流3種形式,3種繞流形式對(duì)應(yīng)3種不同聲場(chǎng),混合繞流的聲場(chǎng)呈現(xiàn)多極子分布與單圓柱偶極子噪聲分布有明顯不同,流場(chǎng)分布形式直接決定聲場(chǎng)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.
【作者單位】： 哈爾濱工程大學(xué)動(dòng)力與能源工程學(xué)院;北京民用飛機(jī)技術(shù)研究中心;
【基金】：國(guó)家自然科學(xué)基金面上資助項(xiàng)目(51479038);國(guó)家自然科學(xué)基金青年科學(xué)基金資助項(xiàng)目(51206031)
【分類號(hào)】：O357.5

【共引文獻(xiàn)】

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