Jet Engine Technology Research Center, Aerospace Research and Development Directorate, Japan Aerospace Exploration Agency (JAXA)
Jet Engine Technology Research Center, Aerospace Research and Development Directorate, Japan Aerospace Exploration Agency (JAXA)
Outdoor static engine noise tests for aircraft noise certification or verification of developing engine noise reduction technologies are required to be conducted under the limited wind conditions to maintain the reliability of the measured far field noise data. In some cases, the uncontrollable wind can be the major factor which causes the delay of engine development projects or noise reduction technology research programs. In order to minimize the risk, the feasibility of windbreak walls to improve the acoustical arena wind conditions was studied by Computer Fluid Dynamics (CFD) analysis. Several configurations of windbreak walls were parametrically analyzed and evaluated. As a result of the analysis, it was found that some windbreak wall configurations had the possibility to improve the acoustical arena wind conditions, but did not have enough windbreak effect against the crosswind from specific directions. Further study is necessary to find more feasible and practical windbreak wall configurations.
内容記述
形態: カラー図版あり
内容記述(英)
Physical characteristics: Original contains color illustrations