遠心羽根車とディフューザの干渉による非定常流れの解析 : 第1報,ポンプ羽根車内の圧力変動の測定

概要

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The pressure fluctuations were measured in the impellers of centrifugal pumps with vaned diffusers. Frequency analysis shows that N (rotor speed)×Z_d (number of diffuser blades) component and its harmonics are dominant in the fluctuations. The amplitudes of the NZ_d component have their minimum value when the flow coefficient is close to the value for shockless entry into the diffuser vanes. The phase angles of the NZ_d component at most measuring points are determined only by the circumferential position of the measuring points when the flow coefficient is small. The maximum amplitude of the NZ_d component throughout the experiments was 4% of the dynamic pressure defined by the peripheral velocity of the impellers.
一般社団法人日本機械学会の論文
1985-11-25