發(fā)布時間：2018-03-04 09:33

  本文選題：閃蒸噴霧　切入點：可視化　出處：《化工學(xué)報》2016年12期 　論文類型：期刊論文

【摘要】：閃蒸噴霧過程中噴管內(nèi)流動狀態(tài)對噴霧形態(tài)及霧化效果具有重要的影響。為了觀察噴管內(nèi)流動狀態(tài)及其對應(yīng)的噴霧形態(tài),使用高速相機對不同噴射壓力條件下制冷劑R134a在石英玻璃直噴管中的流動狀態(tài)及噴霧形態(tài)進行可視化研究,同時分析不同噴射壓力條件下噴霧半徑的動態(tài)變化情況。研究發(fā)現(xiàn),噴管內(nèi)的氣化可以促進噴管出口處噴霧半徑的迅速擴大,但同時限制了噴霧半徑在噴霧過程中的進一步發(fā)展。噴管內(nèi)流動狀態(tài)在一定噴射壓力下具有極強的不穩(wěn)定性,在噴管內(nèi)形成均勻的泡狀流有利于形成均勻、穩(wěn)定的噴霧形態(tài)。
[Abstract]:In order to observe the flow state in the nozzle and its corresponding spray pattern, the flow state in the spray tube has an important influence on the spray morphology and atomization effect during the flash spray process. The flow state and spray morphology of refrigerant R134a in quartz glass direct nozzle under different injection pressure were studied visually by high speed camera, and the dynamic change of spray radius under different injection pressure was analyzed. Gasification in the nozzle can promote the rapid expansion of the spray radius at the nozzle outlet, but at the same time limit the further development of the spray radius during the spray process. The formation of a uniform bubbly flow in the nozzle is conducive to the formation of a uniform and stable spray pattern.
【作者單位】： 西安交通大學(xué)動力工程多相流國家重點實驗室;
【基金】：國家自然科學(xué)基金重點項目(51336006)~~
【分類號】：TK12
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本文編號：1565132