再生ポンプの騒音低減方法と定量評価法

概要

論文の詳細を見る
The high-pitched noise emitted by a regenerative pump is mostly generated by the impact of the recirculating flow against the partition between the discharge port and the suction port. The recirculating flow between the impeller and the flow passage in the pump is the basic mechanism for the pumping action. In a test pump, 87% of the noise energy was generated by this factor under nominal operating conditions. By tilting the surface of the partition on the discharge port side, the energy of the impact noise was reduced as much as 57%, and the noise level of the pump was decreased by 3 dB. An analytical model of noise generation by impact of the recirculating flow was developed, and the predicted noise levels of the pump with the partition tilted at four different angles agreed with experimental data within 0.3 dB.
1993-09-25