火箭推进

为了研究变螺距诱导轮的气蚀性能，通过试验观察了变螺距诱导轮的气蚀发展变化情况，分析了其内部的压力脉动现象。结果表明：诱导轮内的气穴随着入口压力降低，会呈现不同的气穴形态；气穴发展受流量影响，流量越大，气穴发展速度越快；诱导轮内发生了同步旋转气蚀，同步旋转气蚀也受流量影响，流量越大，同步旋转气蚀越强。

In order to study cavitation performance of the variable-pitch inducer, the cavitation development and variation of the variable-pitch inducer were observed, and the pressure pulsation phenomenon in the inducer was investigated. The results show that the different cavitation shapes appear in cavitation in the inducer with inlet pressure decreasing, flow rate has an effect on cavitation development, which means that the cavitation develops faster at higher flow rate, synchronous rotating cavitation appears in the inducer, and the higher the flow rate is, the more serious the synchronous rotating cavitation becomes.

引言
1 研究对象
2 试验方法
3 试验结果与分析
4 结论

图1 变螺距诱导轮<br/>Fig.1 Picture of variable-pitch inducer

图1 变螺距诱导轮
Fig.1 Picture of variable-pitch inducer

表1 诱导轮参数<br/>Tab.1 Main parameters of the inducer

表1 诱导轮参数
Tab.1 Main parameters of the inducer

图2 诱导轮试验装置布局图<br/>Fig.2 Test facility for cavitation performance of inducer

图2 诱导轮试验装置布局图
Fig.2 Test facility for cavitation performance of inducer

图3 诱导轮试验和非稳态压力测量位置<br/>Fig.3 Inducer test and unsteady pressure measuring location

图3 诱导轮试验和非稳态压力测量位置
Fig.3 Inducer test and unsteady pressure measuring location

图4 诱导轮压力测量位置<br/>Fig.4 Pressure measuring position of inducer

图4 诱导轮压力测量位置
Fig.4 Pressure measuring position of inducer

图5 诱导轮的水力性能<br/>Fig.5 Hydraulic performance of the inducer

图5 诱导轮的水力性能
Fig.5 Hydraulic performance of the inducer

图6 诱导轮气蚀性能曲线<br/>Fig.6 Cavitation performance of the inducer

图6 诱导轮气蚀性能曲线
Fig.6 Cavitation performance of the inducer

图7 设计流量Qd气蚀流动随气蚀数发展变化情况<br/>Fig.7 Variation of cavitation flow in inducer with different cavitation numbers at design flow Qd

图7 设计流量Qd气蚀流动随气蚀数发展变化情况
Fig.7 Variation of cavitation flow in inducer with different cavitation numbers at design flow Qd

图8 设计流量Qd下σ=0.136 6时不同时刻气穴形态<br/>Fig.8 Cavitation shapes at different moment and at design flow Qd，as σ=0.136 6

图8 设计流量Qd下σ=0.136 6时不同时刻气穴形态
Fig.8 Cavitation shapes at different moment and at design flow Qd，as σ=0.136 6

表2 不同流量下的初生气蚀数<br/>Tab.2 Inception cavitation number of inducer at different flow

表2 不同流量下的初生气蚀数
Tab.2 Inception cavitation number of inducer at different flow

图9 诱导轮压力面气蚀（Q=1.1Qd，σ=0.136 6）<br/>Fig.9 Cavitation at pressure side of inducer blade as Q=1.1 Qd and σ=0.136 6

图9 诱导轮压力面气蚀（Q=1.1Qd，σ=0.136 6）
Fig.9 Cavitation at pressure side of inducer blade as Q=1.1 Qd and σ=0.136 6

图10 设计流量Qd下σ=0.422 1 时诱导轮前缘压力脉动<br/>Fig.10 Coherence and cross-spectrum phase on leading edge of inducer at design flow Qd, as σ=0.422 1

图10 设计流量Qd下σ=0.422 1 时诱导轮前缘压力脉动
Fig.10 Coherence and cross-spectrum phase on leading edge of inducer at design flow Qd, as σ=0.422 1

图11 设计流量 Qd下诱导轮入口压力的瀑布图<br/>Fig.11 Waterfall plot of power spectrum of inducer inlet pressure at design flow Qd

图11 设计流量 Qd下诱导轮入口压力的瀑布图
Fig.11 Waterfall plot of power spectrum of inducer inlet pressure at design flow Qd

图12 设计流量Qd 下σ=0.034 1 时诱导轮前缘压力脉动<br/>Fig.12 Pressure pulsation on leading edge of inducer at design flow Qd, as σ=0.034 1

图12 设计流量Qd 下σ=0.034 1 时诱导轮前缘压力脉动
Fig.12 Pressure pulsation on leading edge of inducer at design flow Qd, as σ=0.034 1

图13 1.1 Qd下原诱导轮入口压力的瀑布图<br/>Fig.13 Waterfall plot of inlet static pressure of original inducer at 1.1 Qd

图13 1.1 Qd下原诱导轮入口压力的瀑布图
Fig.13 Waterfall plot of inlet static pressure of original inducer at 1.1 Qd

图14 0.8 Qd下原诱导轮入口压力的瀑布图<br/>Fig.14 Waterfall plot of inlet static pressure of original inducer at 0.8 Qd

图14 0.8 Qd下原诱导轮入口压力的瀑布图
Fig.14 Waterfall plot of inlet static pressure of original inducer at 0.8 Qd

表3 不同流量下同步旋转气蚀引起的最大压力脉动幅值<br/>Tab.3 Maximum pressure pulsation amplitude of SRC at different flow rates

表3 不同流量下同步旋转气蚀引起的最大压力脉动幅值
Tab.3 Maximum pressure pulsation amplitude of SRC at different flow rates

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备注

引言

1 研究对象

2 试验方法

3 试验结果与分析

4 结论

期刊信息