This paper introduces a 4~(th)-order accurate low-dissipation flux scheme for use on unstructured CFD codes, and compares this flux scheme with two others for LES calculations of hot and cold supersonic jets. The flux schemes are compared with experimental profiles of jet centerline Mach number, total temperature and total pressure, with jet spreading rate data, and with near-field acoustic measurements. The influence of grid resolution on solution accuracy is also evaluated. The new low-dissipation flux scheme is shown to be stable on a high-speed compressible turbulent flow problem, and to be significantly more accurate than the existing baseline flux approach.
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