本文關鍵詞： 直筒籠式閥 聲類比理論 流噪聲 聲壓 大渦模擬 頻譜特性 偶極子特性　出處：《熱力發(fā)電》2017年06期 　論文類型：期刊論文

【摘要】：根據(jù)LES和Lighthill聲類比理論,采用流體力學軟件Fluent和聲學仿真軟件ACTRAN,研究計算了直筒籠式閥門在相同流量,100%、70%和40%開度下,閥門內(nèi)部和外部的流噪聲特性。結(jié)果表明:在低頻時閥門內(nèi)部聲壓,同組監(jiān)測點頻譜特性分布相似,聲壓幅值較大,在高頻時分布差異較大;當閥門開度降低時,閥門內(nèi)的湍流強度、速度和壓力波動均相應增強,導致閥門內(nèi)外的整體聲壓分貝變強,閥門內(nèi)部噪聲能量也增強;閥門噪聲具有偶極子特性。
[Abstract]:According to the acoustic analogy theory of LES and Lighthill, the hydrodynamic software Fluent and acoustic simulation software ACTRAN are used to study and calculate the straight cage valve at the same flow rate of 70% and 40% open. Flow noise characteristics inside and outside the valve. The results show that the frequency spectrum characteristics of the same group of monitoring points are similar at low frequency, the amplitude of sound pressure is larger, and the distribution is different at high frequency. The turbulence intensity, velocity and pressure fluctuation in the valve are increased accordingly, which results in the sound pressure inside and outside of the valve increasing, and the internal noise energy of the valve is also enhanced, and the valve noise has dipole characteristics.
【作者單位】： 杭州電子科技大學機械工程學院;
【基金】：國家自然科學基金(11472095,50909031)~~
【分類號】：TH134
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本文編號：1538965