Acoustic liners are used to absorb sound waves in ducts with flow. These liners can become
unstable and some experiments have shown that in this case they do not damp sound as …

A general methodology to simulate acoustic propagation in ducts with extended-reacting
liners in the time domain is presented, including a generic perforated sheet on the air …

Poisson's equation is an important equation to postprocess the aerodynamic fields into
linearized momentum modes and was recently found to be important for the computation of …

复杂流场如剪切层, 旋涡等会改变气动噪声的传播特性, 引起折射, 反射和散射等现象,
对声源识别, 测量产生影响. 基于线化方程的声传播计算方法是研究声波在复杂流场中传播的 …

Acoustics are considered in a straight cylindrical lined duct with an axial mean flow that is
uniform apart from a boundary layer near the wall. Within the boundary layer, which may or …

Rotor shock noise is one of the main noise sources of today's aircraft engines in take-off and
climb flight conditions. The control and reduction of this noise source is of paramount …

View Video Presentation: https://doi. org/10.2514/6.2021-2171. vid The paper consists of two
parts. The first part presents further evaluation of the prediction capability of an enhanced …

This paper addresses one of the major obstacles arising in the high-fidelity scale-resolving
simulations of turbulent flows inside ducts with the walls covered by acoustic liners in order …