用边界单元法计算离心风机噪声辐射

• 来源期刊: 工程热物理学报
• 学科: 工学
• 关键词: 边界元 离心风机 噪声辐射
• 年，卷（期）: 1999,（2）
• 页码范围: 190-193
• 页数: 4页
• 分类号: TH432
• 语种: 中文

摘要

This thesis presents a method for the determination of fan casing noise radiation. Boundary element program is developed to calculate the acoustic pressure on the surfaceof fan casing in terms of its surface vibration which measured experimentally. The SurfaceHelmholtz integral Equation discretized by isoparametric element was selected as the concrete calculation method. The acoustic fields resulting from differellt aeroacoustic sourcescan be differentiated by using the method which provides a theoretical principle for fan noisedecrease techniques.