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时均流诱导的声振荡可以为热声制冷提供驱动源或驱动发电机和换能器发电,为风能利用提供了新思路,是热声领域的最新研究方向之一。本文基于计算流体动力学(CFD)方法,建立了正十字型时均流激声发动机的三维数学模型,采用大涡模拟湍流模型计算。计算结果验证了时均流诱导声振荡效应,揭示出谐振管内声场分布和谐振管内部压力与开口处涡的关系,为后续的实验研究奠定了理论基础。
When the average current-induced acoustic oscillation can provide a driving source for thermoacoustic refrigeration or drive generators and transducers to generate electricity, which provides a new idea for wind energy utilization and is one of the newest research directions in the field of thermoacoustic. Based on Computational Fluid Dynamics (CFD) method, a three-dimensional mathematical model of forward cross-flow averaging engine is established, which is calculated by LES turbulence model. The calculated results verify the time-averaged flow-induced acoustic oscillation effect and reveal the relationship between the acoustic field distribution in the resonance tube and the internal pressure of the resonance tube and the vortex at the opening, which lays a theoretical foundation for the subsequent experimental research.