空調用貫流ファンの流体騒音予測 : 第2報,騒音予測モデルを用いた貫流ファンの低騒音化(流体工学,流体機械)

概要

論文の詳細を見る
A model for predicting the noise level of cross-flow fans has been developed. This model uses the relative air-flow velocities on the outside of the fan's impeller. And it is based on two assumptions: (i) noise levels are in proportion to the relative velocities at the edge of the blade raised to the sixth power and (ii) the velocities on the outside of the fan's impeller have an especially close relation to the noise level. Computational fluid dynamics is used to obtain the necessary velocity field data for this model. It was found that the noise levels calculated by this model agree well with the measured noise levels of a test impeller. This agreement confirms that noise level of a conventional cross-flow fan can be predicted by this simple model, since relative velocity data is readily available from frequently executed computational analyses. Accordingly, the predicted noise level was then applied in the design of a new cross-flow fan. This new cross-flow fan has a velocity field that produces a quiet flow. As a result, it has a lower noise level and higher performance.
一般社団法人日本機械学会の論文
2004-02-25