Zhang, J; Zhang, L; Zangeneh, M; (2023) A 3D inverse design based rapid multi-disciplinary optimization strategy for radial-inflow turbines. In: Institution of Mechanical Engineers, (ed.) 15th International Conference on Turbochargers and Turbocharging. (pp. 196-209). CRC Press: Abingdon, UK.

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Abstract

The radial-inflow turbines have been widely used in the turbocharger applications and the most common challenge for designing turbocharger turbines is to obtain the best efficiency possible while maintaining a good stress level which is quite difficult due to the very high tip speed and high turbine inlet temperature. The conventional way of tackling this multidisciplinary problem is to perform CFD/FEA analysis for a large number of designs (DOE) and build an RSM/surrogate model based on the design matrix then use optimiser to find the optimal solution. Inverse design method which is a 3D inviscid design method for turbomachinery blades has been used in the same way with some post modification/treatment on the blade geometry called radialfilament modification. In this paper, we proposed to use some aerodynamic and mechanical performance parameters from inverse design solution and a direct optimisation optimiser apporach to perform the multidisciplinary optimisation. The final optimised design shows the similar aerodynamic and mechanical performance as the baseline design (optimized through DOE) with significantly reduced number of CFD/FEA simulations.

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