针对射流泵能量转化效率低、易发生空化等问题，设计了一种基于固定导叶的旋流式射流泵，并在恒定水温条件下，依托射流泵循环实验台，系统开展了导叶高度、面积比及进口压力等参数对其性能的影响规律研究。研究表明，固定导叶高度是影响性能提升的关键参数，高度为3mm时效果最优，可使效率最大提升13.2%；过高或过低均不利于性能改善。旋流结构能有效抑制喉管中后部低压区，延缓空化发展，提高极限流量比与压力比，从而提升射流泵在接近极限工况时的性能。然而，该结构对面积比较为敏感，在较大面积比(m=4)下效果显著，而在较小面积比(m=1.78)下性能提升有限；此外，随着进口压力的升高，旋流带来的效率增益逐渐减弱。

To overcome the low energy conversion efficiency and the susceptibility to cavitation in conventional jet pumps, a swirl jet pump incorporating fixed guide vanes was developed. Experiments were systematically carried out on a jet pump circulation test rig under constant water temperature conditions to investigate the effects of guide vane height, area ratio, and inlet pressure on the performance of the jet pump. The results indicate that the height of the fixed guide vanes is a critical parameter influencing performance enhancement. An optimal vane height of 3 mm was identified, which can improve efficiency by up to 13.2%. Deviations from this height, whether higher or lower, adversely affect performance. The swirl structure effectively suppresses low-pressure zones in the middle and rear sections of the throat, delays cavitation development, and increases the limited flow ratio and pressure ratio, thereby enhancing pump performance under near-limited operating conditions. However, the effectiveness of this structure is highly sensitive to the area ratio. Significant performance improvements are observed at larger area ratios (m=4.00), while only limited enhancements are achieved at smaller area ratios (m=1.78). Furthermore, as the inlet pressure increases, the efficiency gains attributable to the swirl structure gradually diminish.

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