1203 ディフューザポンプ翼列干渉により誘起される共鳴現象
詳細
In plants, pressure fluctuation in specific frequency occurs by operating fluid machinery such as a pump. If the frequency is consistent with that of pipe liquid resonance, the large vibration of the pipe and machinery may be induced. In this study, unsteady pressure in an air test model of diffuser pump was measured to clarify the generating mechanism of the pressure fluctuations. It is found that there are two types of resonances, "air column resonance" and "pressure fluctuation induced by rotor stator interaction". Moreover, it is clarified that the pressure fluctuation by resonance is decreased by setting an orifice at a node of a standing wave by echo sound test using a speaker. Also it is clarified that the smaller opening ratio of the orifice is, the larger the pressure fluctuation is decreased.
