Near-Field Computational Fluid Dynamics Method for Wave Drag Decomposition

Partial-pressure fields have shown the capabilities to decompose drag into relevant sources. In transonic flow, they may be used in combination with classical far-field integrals to derive wave drag. The original method is reliant on both accurate near-field and far-field grids, making it less advantageous than classical far-field wave drag integrals. In the present work, a new method was developed to predict wave drag by solely using a near-field analysis. The method uses both partial-pressure fields and lifting-line theory. The theory was derived and applied to a total of four cases on the ONERA M6 wing, including three transonic cases, one of which was a special zero-lift case, and a subsonic compressible case. A comparison of resulting wave drag results was conducted between the new method, classical far-field decompositions, and the original hybrid partial-pressure field method.