在低音平行平均流量中进行二维声音传播的半分析方法
Jinxiao Li1, Haijun Wu1, Changjiang Liao2
1State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China.
The Journal of the Acoustical Society of America
|September 5, 2025
概括
一种新方法,即线性速度配置快速场程序 (LFFP),可以准确地预测流中的二维声场. 它提高了精度和效率,特别是在高速梯度下,优于传统方法.
科学领域:
- 听力学
- 流体动力学
- 计算物理
背景情况:
- 在噪音控制和声纳等应用中, 预测移动流体中的声音传播至关重要.
- 传统的快速场程序 (FFP) 方法面临着环境流中的高速度梯度的挑战.
- 在复杂的流环境中准确建模声音场仍然是一个活跃的研究领域.
研究的目的:
- 引入一种新型的半分析方法,即线性速度配置文件快速场程序 (LFFP),用于增强2D声场的预测.
- 提高平行平均流量的声音场预测的计算效率和准确性,特别是具有显著速度梯度的声音场预测.
- 与传统的FPF相比,为LFFP的提高准确性提供一个系统的数学解释.
主要方法:
- 通过将线性速度分层集成到快速场程序 (FFP) 框架中,开发了线性速度分层快速场程序 (LFFP).
- 使用2D喷气场景对频率域中的线性化欧勒方程进行验证的LFFP精度.
- 使用剩余分析来研究和解释LFFP在剪流场景中的增强精度.
主要成果:
- 与传统的FFP相比,LFFP显示出更高的精度和更低的计算成本,特别是在高速梯度条件下.
- 对线性化欧勒方程的验证证实了LFFP对二维声音场的预测能力.
- 确定了普里德莫尔-布朗运算符中的第二个速度梯度项作为LFFP改进精度的关键.
结论:
- 在平行平均流量中,LFFP方法在预测二维声场方面取得了重大进展.
- 基于残留分析开发的多层阶梯模型进一步提高了复杂环境的计算效率.
- 在动态流体环境中,LFFP提供了更准确,更有效的声学建模工具.
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