A note on 'Computational aeroacoustics examples showing the failure of the acoustic analogy theory to identify the correct noise sources' by Ckw Tam

摘要

In a recent paper (J. Computational Acoustics 10 (2002) 387-405) Tam has claimed that the famous Lighthill Acoustic Analogy predicts the wrong flow field for the simple problem of the propagation of a normal shock. However, we show that Tam has misinterpreted the results of his analysis, and that when this error is corrected the results of the Acoustic Analogy are brought into exact agreement with the well-known Rankine-Hugoniot solution of the Euler equations.