Application of Modified Loss and Deviation Correlations to Transonic Axial Compressors
ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE)
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The goal of this work was to analyse the transonic compressor tests available in the open literature and to propose possible improvements in total loss and turning correlations. The following conclusions are reached 1 The level of accuracy of deviation prediction should be greater than that of losses. 2 The off-design deviation correlation which gives most consistent and successful results was found to be that of Creveling. 3 The minimum loss incidence predicted by the NASA-2D correlation needs a modification separately for DCA and MCA blade profiles. This modification depends on the blade element geometry and accounts for the transonic and 3-D effects which can not be separated in the presented investigation. 4 The design deviation angle correlation of Carter needs a correction for taking into account the transonic and 3-D effects which are not separable in the analysed data. 5 The off-design transonic loss correlation developed in this work compares quite favorably with the other available off-design correlations in terms of overall performance prediction. 6 Koch and Smith minimum loss correlation is the most accurate design loss prediction method available in the open literature. The comparison of the experimental results of a 2-stage compressor with the computed results using the new correlation set, revealed that the new set can be regarded as satisfactory in giving the overall trends in deviation, losses and fluid properties except at the end walls.
- Hydraulic and Pneumatic Equipment
- Fluid Mechanics