【摘要】：在自行搭建的單孔孔板空化反應試驗臺上,采用高速數碼攝影和長工作距離顯微成像技術,對單孔孔板中心孔內和孔板下游進行空化特性試驗研究,分析了背壓、空化數等參數對孔板水力空化的影響.試驗結果顯示:當背壓一定,逐漸改變噴射壓力時,會出現"空化初生遲滯"現象,在空化兩相流區(qū),較高的背壓對應著較小的流動損失;孔板內和孔板下游都有空化區(qū)存在,且孔內空化對下游空化區(qū)影響較大.數值模擬結果顯示,孔內空化與試驗相符合,且下游空化區(qū)的產生是由孔內空化云脫落至下游漩渦區(qū)引起的.
[Abstract]:The cavitation characteristics of the central hole of the single hole plate and the downstream of the hole plate were studied by using high speed digital photography and long working distance microscopic imaging technology on the cavitation reaction test bench of the single hole plate built by ourselves, and the back pressure was analyzed. Effect of cavitation number and other parameters on hydraulic cavitation of orifice plate. The experimental results show that when the back pressure is certain and the injection pressure is changed gradually, the phenomenon of "cavitation primary lag" will occur. In the cavitation two-phase flow region, the higher back pressure corresponds to a smaller flow loss. There are cavitation areas in the orifice plate and downstream of the orifice plate, and the cavitation in the hole has a great influence on the downstream cavitation zone. The numerical simulation results show that the cavitation in the hole is in good agreement with the experiment, and the formation of the downstream cavitation zone is caused by the falling off of the cavitation cloud in the hole to the downstream vortex area.
【作者單位】： 江蘇大學能源與動力工程學院;江蘇大學能源研究院;
【基金】：國家自然科學基金資助項目(51176066)
【分類號】：TV131.6

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本文編號：2474259