書誌事項
- タイトル別名
-
- Experiment and Numerical Analysis on Reducing Flow Noise of a Louver-Type Diffuser
抄録
The purpose of this study is to reduce the flow noise of a louver-type diffuser and to obtain knowledge for noise reduction design. The sound source and acoustic characteristics of the noise generated from a Louver-type diffuser were investigated by experiment and numerical analysis (CFD). The experiment was performed using an anechoic chamber capable of low-noise air supply. As a result, it was confirmed that noise such as a whistle sound was generated from the diffuser, and the peak frequency shifted to a high frequency depending on the wind velocity. Moreover, it was clarified that the cause of the whistle noise was the butting-joint and cavity of the blade. In addition, it was found by CFD analysis that closing the cavity reduces the physical quantity related to the flow disturbance such as pressure fluctuation.
収録刊行物
-
- 環境工学総合シンポジウム講演論文集
-
環境工学総合シンポジウム講演論文集 2019.29 (0), J114-, 2019
一般社団法人 日本機械学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390565134810092672
-
- NII論文ID
- 130007773193
-
- ISSN
- 24242969
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可