采用k-ε 湍流模型和非等間距加密網(wǎng)格，對射流泵流場進(jìn)行了數(shù)值模擬和分析，并對相應(yīng)的流場進(jìn)行了實驗研究。結(jié)果表明，流場軸向速度剖面在擴(kuò)散管段具有較好的自相似性，而在喉管段則不然；這種速度剖面變化的轉(zhuǎn)折點(diǎn)與喉管的長度有關(guān)；流場的湍動能分別在噴嘴出口與擴(kuò)散管入口處產(chǎn)生峰值，并且前者遠(yuǎn)大于后者，可見射流泵流場中，
湍流主要發(fā)生在喉管入口處，湍動能的不平衡將導(dǎo)致額外的能量損失。本研究結(jié)果對工程應(yīng)用有指導(dǎo)意義。

The k-ε model and unequal interval computational meshes were used to analyze and numerically simulate the turbulent flow in the jet pump, and corresponding experiments were performed. The results show that the axial velocity profiles possess well self-similarity in the diverging portion, however, it does not in the throat. The transition point from non-similarity to self-similarity is related to the length of the throat. The maximum turbulent energy of the flow occurs in the exit of the jet and the entrance of the diverging portion, and the former is much larger than that of the latter. Therefore it can be seen that the turbulence is produced mainly in the entrance of the throat. The unbalance of turbulent energy will bring about the additional energy loss. The
conclusions of the study are helpful to the engineering practice.