本文關(guān)鍵詞： 油氣潤滑 環(huán)狀流 時頻分析 擾動波　出處：《潤滑與密封》2017年09期 　論文類型：期刊論文

【摘要】：定義油氣潤滑系統(tǒng)水平管環(huán)狀流的氣液折算速度,通過仿真提取油氣潤滑系統(tǒng)水平管中不同氣液折算速度下不同位置瞬態(tài)油膜厚度隨時間的變化值,運(yùn)用時頻分析方法研究環(huán)狀流油膜擾動波信號的自相關(guān)函數(shù)、互相關(guān)函數(shù)以及功率譜密度函數(shù),分析油氣潤滑系統(tǒng)中氣液環(huán)狀流油膜擾動波特性。結(jié)果表明,不同氣液折算速度下油氣潤滑系統(tǒng)環(huán)狀流油膜擾動波信號的自相關(guān)、互相關(guān)函數(shù)與功率譜密度函數(shù)具有不同的特征;液相折算速度不變時,隨著氣相速度增大,擾動波的平均波速和波長增大,平均頻率減小,低頻區(qū)環(huán)狀流液膜擾動波攜帶的能量減少;氣相折算速度不變時,隨著液相速度增大,擾動波的平均波速和波長及平均頻率均減小,擾動波攜帶的能量主要集中在低頻區(qū),且在低頻區(qū)能量波動顯著。
[Abstract]:The gas-liquid conversion velocity of the annular flow in the horizontal tube of oil-gas lubrication system is defined. The transient oil film thickness at different positions under different gas-liquid conversion velocities in the horizontal tube of the oil-gas lubrication system is obtained by simulation. The autocorrelation function, cross-correlation function and power spectrum density function of annular flow oil film disturbance wave signal are studied by time-frequency analysis method, and the characteristics of gas-liquid annular oil film disturbance wave in oil and gas lubrication system are analyzed. The correlation between cross-correlation function and power spectral density function of annular flow oil film disturbance wave signals in oil-gas lubrication system is different at different gas-liquid conversion velocities, and when the liquid phase conversion velocity is constant, the gas phase velocity increases. The average wave velocity and wavelength of the disturbance wave increase, the average frequency decreases, and the energy carried by the liquid film disturbance wave decreases in the low frequency region, while the gas phase conversion velocity increases with the increase of the liquid phase velocity. The average wave velocity, wavelength and average frequency of the disturbance wave are decreased, and the energy carried by the disturbance wave is mainly concentrated in the low frequency region, and the energy fluctuation is significant in the low frequency region.
【作者單位】： 北方工業(yè)大學(xué)機(jī)械與材料工程學(xué)院;
【基金】：北京市屬高等學(xué)校人才強(qiáng)教計劃項目(PHR201107109)
【分類號】：TH117.2
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本文編號：1529069