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BCFD Analysis for the 2nd AIAA Propulsion Aerodynamics Workshop: Nozzle Results

机译：第二届AIAA推进空气动力学研讨会的BCFD分析：喷嘴结果

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Unstructured grid solutions for the second AIAA Propulsion Aerodynamics Workshop are presented for the dual separate flow reference (DSFR) nozzle test case. The BCFD code is used on supplied workshop grids as well as custom grids. The focus of the work is to determine the suitability of CFD to predict thrust coefficients and discharge coefficients for the DSFR nozzle. Both axisymmetric and three-dimensional solutions are presented. Focus is given to the steady-state turbulence model variations, mainly between the SA and SST model. A detailed grid convergence study is performed for both the axisymmetric and three-dimensional cases. A non-eddy viscosity turbulence model is also examined on the three-dimensional cases. A brief description is given on selected cases from the first workshop. Discussion is also given to the possible extensions for the future workshops. It is found that at the grid converged limit, there is very little, if any, difference between turbulence models in terms of flow coefficient and SST is seen to predict slightly higher thrust levels than other models.
机译：针对第二个独立流动参考（DSFR）喷嘴测试案例，介绍了第二届AIAA推进空气动力学研讨会的非结构化网格解决方案。 BCFD代码可用于提供的车间网格和自定义网格。工作的重点是确定CFD是否适合预测DSFR喷嘴的推力系数和排放系数。提出了轴对称和三维解决方案。重点是稳态湍流模型的变化，主要是在SA模型和SST模型之间。对轴对称和三维情况都进行了详细的网格收敛研究。在三维情况下，还检验了非涡流粘度湍流模型。简要介绍了第一次研讨会中的一些案例。还讨论了将来的研讨会的可能扩展。发现在网格收敛极限处，湍流模型之间在流量系数和SST方面的差异很小（如果有的话），可以预测比其他模型略高一些的推力水平。

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