本文選題：集輸立管系統(tǒng)　切入點：非穩(wěn)定流型　出處：《工程熱物理學報》2017年06期

【摘要】：實驗研究了集輸-立管系統(tǒng)內空氣水的兩相流動,將其流動結構分為穩(wěn)定和非穩(wěn)定兩大類流型并建立寬廣流速范圍內的流型圖;揭示了非穩(wěn)定流動中不規(guī)則流型流動特性及其形成機理;集輸-立管系統(tǒng)內液相的逐漸積累是不穩(wěn)定階段建立的關鍵因素,多次噴發(fā)導致系統(tǒng)內液量的大量減少,在低折算液速下不能及時彌補減少量是穩(wěn)定階段建立的主要因素。實驗發(fā)現(xiàn),中高折算速度條件下,立管整體壓差波動幅度與水平管段壓差波動幅度均隨折算速度的增大先增大后減小;而在低折算速度條件下,則表現(xiàn)為單調遞減的變化規(guī)律;并建立了各自相應的壓差波動特性等高線圖。
[Abstract]:The two-phase flow of air and water in the gathering and riser system is studied experimentally. The flow structure is divided into stable and unsteady flow patterns and the flow pattern in a wide range of velocity is established.The characteristics and formation mechanism of irregular flow patterns in unsteady flow are revealed, and the gradual accumulation of liquid phase in the gathering and riser system is the key factor for the establishment of the unstable stage, and many eruptions result in a large reduction of the liquid volume in the system.The main factor of the stable stage is that the reduction can not be made up in time at low liquid velocity.The experimental results show that under the condition of medium and high conversion velocity, the fluctuation amplitude of the whole pressure difference of riser and the fluctuation amplitude of pressure difference in horizontal section increase first and then decrease with the increase of conversion velocity, but under the condition of low conversion velocity, the variation law of monotone decrease is shown.The corresponding contour diagrams of pressure fluctuation characteristics are established.
【作者單位】： 西安交通大學動力工程多相流國家重點實驗室;
【基金】：國家重大科技專項(No.2016ZX05028-004-002) 國家自然科學基金(No.51527808)
【分類號】：TE866

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