Table 4: Amplitude of frequency domain and MPF at impeller monitoring points (see Figures 9(a), 9(b), and 9(c)).

ItemsFrequency6/(6)7/(7)8/(8)

Without splitter (a)8.33 Hz6018.0211049.182256.43
16.67 Hz1649.962377.97281.91
33.33 Hz2255.834226.271600.46
41.67 Hz2872.053407.421617.94
MPF8.0511.474.34

With splitter (b)8.33 Hz7445.423633.10164.20
16.77 Hz2417.612764.29645.44
33.33 Hz2466.573954.631000.15
41.67 Hz2674.592972.82458.17
MPF8.557.582.02

With splitter (c)8.33 Hz7195.571958.94424.43
16.77 Hz2589.07909.47756.64
33.33 Hz2413.623585.521085.72
41.67 Hz2313.002206.07617.10
MPF8.596.752.30