高流量の流れが小型軸流ファンの騒音に及ぼす影響

DOI Web Site

書誌事項

タイトル別名
  • Effect of Flow Field at High Flow Rate on Flow Noise in Small Axial Fan
  • コウリュウリョウ ノ ナガレ ガ コガタジクリュウ ファン ノ ソウオン ニ オヨボス エイキョウ

この論文をさがす

説明

<p>Recently noise reduction of a small axial flow fan for cooling electronic devices is required. When obstacles such as motor stays are located in back of a fan, noise of an axial flow fan becomes higher. In this study, numerical simulations were conducted by using LES (Large Eddy Simulation) with DSM (Dynamic Smagorinsky Model) about an axial flow small fan in order to clarify the noise reduction mechanism at high flow rate. The flow pattern around the fan blades and pressure fluctuation on the fan blade surfaces were compared under the conditions of different flow rates. The fan noise at high flow rate (Q=0.030 m3/s) is lower 1.9dB(A)than the noise at design point flow rate (Q=0.025 m3/s). The pressure fluctuation at pressure side surface of blades at high flow rate becomes low compared with the pressure fluctuation at design point flow rate. The axial flow velocity at the blade tip increases at high flow rate, which decreased pressure fluctuation on pressure side blade surface due to the interference between tip vortex and blade surface, and decreased pressure fluctuation on suction side surface due to the boundary layer separation.</p>

収録刊行物

  • ターボ機械

    ターボ機械 46 (4), 226-236, 2018

    一般社団法人 ターボ機械協会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ