本文關鍵詞：水介質流噪聲粘聲分離計算方法研究　出處：《中國艦船研究院》2015年碩士論文　論文類型：學位論文

  更多相關文章： 潛艇流噪聲 粘聲分離方法 水動力噪聲 圓柱繞流 空腔流

【摘要】：在高航速下,流噪聲成為影響潛艇隱蔽性的突出因素。準確評估潛艇流噪聲性能,控制流噪聲發(fā)生機制并展開相應的流噪聲優(yōu)化設計是未來潛艇設計的重要環(huán)節(jié)之一。本文以計算水動聲學的理論和計算方法應用為研究對象。考慮了水和空氣的物理特性的巨大差異,將計算氣動聲學的理論和算法成果運用到水動聲學領域。首先,結合水介質狀態(tài)方程,分別在直角坐標和曲線坐標下推導了適用于水介質流噪聲的粘聲分離計算方法的控制方程和離散格式;然后,通過水介質中旋轉雙渦發(fā)聲、圓柱水聲反射和圓柱渦聲相互作用現象的典型算例計算,驗證本文建立的粘聲分離計算方法和自主編制的聲場計算程序;最后,以圓柱繞流和空腔流動為簡化的計算模型,應用大渦模擬/粘聲分離的混合計算方法模擬流噪聲的發(fā)生和傳播過程,考察了兩種情況下的流噪聲發(fā)聲機理和傳播特性,并與大渦模擬/聲類比方法進行了比較。分析結果表明,粘聲分離計算方法用于分析水介質流噪聲的產生和傳播機理是有效的。在考察網格尺寸、時間步長、阻尼系數等因素對計算結果的影響后,本文采用的粘聲分離計算方法和編制的聲場計算程序取得了合理可信的計算結果。本文針對水介質可壓縮性極弱、密度大、運動粘度小等物性特點和馬赫數極低,雷諾數較高的流動特點,首次借鑒計算氣動聲學的方法,利用先進數值計算技術,建立了適用于水介質的流噪聲計算方法。本文工作為開發(fā)水動力噪聲估算軟件、進行總體優(yōu)化設計和水動力噪聲研究提供了必要的技術基礎。
[Abstract]:At high speed, the flow noise is a prominent factor affecting the submarines' concealment. It is one of the important links of submarine design to accurately evaluate the performance of submarine noise, control the mechanism of flow noise and optimize the design of the corresponding flow noise. In this paper, the theory and calculation method of hydrodynamic acoustics are applied as the research object. Considering the great difference in the physical characteristics of water and air, the theory and algorithm results of aeroacoustics are applied to the field of hydrodynamic acoustics. First of all, combined with water medium state equation, respectively in Cartesian and curvilinear coordinates are derived for water flow noise calculation method of visco acoustic separation control equation and discrete format; then, through the water medium rotating double vortex sound, typical cylindrical acoustic reflection and cylindrical vortex sound interaction phenomenon is an example this paper established the visco acoustic separation verification calculation method and the establishment of an independent field calculation program; finally, the flow around a circular cylinder and a simplified calculation model for cavity flow, using large eddy simulation / mixed visco acoustic separation calculation method simulation of flow noise generation and propagation process, investigated two cases of flow noise sound mechanism and the propagation characteristics, and with the large eddy simulation / acoustic analogy methods are compared. The analysis results show that the method of viscoelastic separation is effective for the analysis of the generation and propagation mechanism of water medium noise. After studying the influence of mesh size, time step and damping coefficient on the calculation results, the viscoelastic separation calculation method and the sound field calculation program compiled in this paper have obtained reasonable and credible calculation results. According to the water compressibility of the medium is very weak, high density and viscosity small physical characteristics and the Maher number is very low, the flow characteristics of high Reynolds number, the first reference calculation method of aeroacoustics, using advanced numerical technique, calculation method of flow noise is established on the water meter. This work provides the necessary technical basis for the development of the software for the estimation of hydrodynamic noise, the overall optimization design and the study of the hydrodynamic noise.
【學位授予單位】：中國艦船研究院
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U674.76

【參考文獻】

相關期刊論文 前5條

1 曾文德;王永生;楊瓊方;;全附體潛艇流噪聲數值計算[J];兵工學報;2010年09期

2 田軍;徐錦芳;薛群基;;水下流噪聲及其消減措施[J];材料科學與工程;1996年02期

3 張文照;肖昌潤;劉巨斌;王沖;;潛艇模型尾流場和水動力噪聲的測量方法研究[J];海軍工程大學學報;2008年06期

4 劉聰尉;吳方良;李環(huán);彭婭玲;李萬平;;空腔不可壓縮流動特征及其聲學特性研究[J];水動力學研究與進展A輯;2014年02期

5 宋保維;馬驥;胡海豹;陸翔;劉占一;;水下航行器流噪聲特性分析[J];魚雷技術;2009年02期

相關博士學位論文 前3條

1 黃鵬展;定常不可壓縮流的若干穩(wěn)定化方法研究[D];新疆大學;2012年

2 王玉;三維剛性壁面空腔流動機制與水動噪聲研究[D];天津大學;2012年

3 陳榮錢;基于聲波傳播方程的計算氣動聲學混合方法研究[D];南京航空航天大學;2012年

相關碩士學位論文 前1條

1 馬瑞賢;艦船柔性舵流噪聲產生機理研究[D];哈爾濱工業(yè)大學;2014年

，

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