In a projectile, a turbopump is widely used to pressurize oxidizer and fuel to gain high thrust instead of using high pressure tank which has a disadvantage in total weight. Pumps in a turbopump employ an inducer upstream to prevent performance degradation by increasing pressure at the impeller inlet. However, cavitation and related instabilities take place frequently, so numerous analysis have been conducted for turbopumps. In this study, the pumps with and without an inducer were numerically studied using ANSYS CFX 13.0 to analyze the effects of installing an inducer, which was rarely treated before. By comparing these two pumps, the merits and demerits of installing an inducer can be analyzed in the aspects of hydraulic/suction performances and internal flow characteristics. Also, the role of an inducer can be understood in both of non-cavitating and cavitating conditions. As a result, head rise and efficiency of the pump were degraded by installing an inducer in non-cavitating conditions. The inducer could not play a role at high flow rate, and efficiency of the inducer was steeply declined in the off-design conditions. However, suction performance of the pump was greatly improved by adopting the inducer. Head of the pump with an inducer abruptly decreased at the low cavitation numbers, while head of the pump without an inducer started to decline gradually at the high cavitation numbers. In spite of high cavitation number, severe cavitation appeared in the case without an inducer, so it can be said that installing an inducer can prevent performance deterioration from the cavitation and satisfies stable operation which is more important for pumps rather than obtaining high hydraulic performance.

在弹丸中，涡轮泵被广泛用于为氧化剂和燃料加压以获得高推力，而不是使用具有总重量缺点的高压油箱。涡轮泵中的泵在上游采用导流器，以通过增加叶轮入口处的压力来防止性能下降。然而，空化和相关的不稳定性经常发生，因此已经对涡轮泵进行了大量分析。在本研究中，使用 ANSYS CFX 13.0 对带和不带导流器的泵进行了数值研究，以分析安装导流器的影响，这是以前很少处理的。通过比较这两种泵，可以从水力/吸力性能和内部流动特性等方面分析安装诱导轮的优缺点。还，在非空化和空化条件下都可以理解诱导剂的作用。结果，在非气蚀条件下安装诱导器会降低泵的扬程和效率。导流器在高流量下不能发挥作用，在非设计工况下导流器效率急剧下降。但采用诱导轮后，泵的吸入性能大大提高。带诱导器的泵的扬程在低空化数时突然下降，而没有诱导器的泵的扬程在高空化数时开始逐渐下降。尽管空化数很高，但在没有诱导剂的情况下出现了严重的空化，