本文選題：PNF(管道非連續(xù)流體) + 層流��； 參考：《應用力學學報》2016年04期

【摘要】：為了建立管道非連續(xù)流體(PNF)輸送時管內層流壓降數(shù)值模型,基于牛頓流體和賓漢流體管內層流壓降模型,考慮實際工程中氣體在管道中低速運動的阻力對PNF輸送阻力的影響,對PNF壓降模型進行簡化。結合工程實踐詳細分析了PNF管內層流壓降近似表達式和相對精確表達式,并分析了二者之間的偏差。結合對工程數(shù)據(jù)的分析,驗證了PNF管內層流壓降模型的有效性。結果表明:當PNF流量增大或輸送管管徑減小時,使用壓降近似公式與壓降相對精確公式計算出的壓降值之間的偏差會減小。通過與實測值對比表明,本文模型較好地描述了PNF輸送時的壓降。其中壓降近似模型的精度更優(yōu)(計算值與實測值的偏差率為1.16%~8.33%),且求解更方便。
[Abstract]:In order to establish the numerical model of pipe inner flow pressure drop during pipeline discontinuous fluid (PNF) delivery, based on the Newton fluid and Bingham fluid pressure drop model, considering the effect of the resistance of gas in the actual project on the resistance of PNF in the pipeline, the PNF pressure drop model is simplified. In combination with the engineering practice, the PNF tube is analyzed in detail. The approximate expression of laminar pressure drop and the relative precise expression are analyzed, and the deviation between the two is analyzed. The validity of the PNF tube inner flow pressure drop model is verified by the analysis of the engineering data. The results show that the pressure drop calculated by the pressure drop approximates the relative precision formula of the common and pressure drops when the flow rate of PNF is increased or the pipe pipe diameter is reduced. The difference between the measured values and the measured values shows that the model is better in describing the pressure drop of PNF transportation. The precision of the approximate model of the pressure drop is better (the deviation rate of the calculated value and the measured value is 1.16%~8.33%), and the solution is more convenient.
【作者單位】： 中南大學土木工程學院;浙江科技學院土木與建筑工程學院;
【基金】：浙江省自然科學基金(Y1100148)
【分類號】：O37;U171

【相似文獻】

相關期刊論文 前1條

1 凌國燦,李顯霖;地轉渦內層結構解[J];力學學報;1986年04期

，

本文編號：1981351