... Integer Nonlinear Programming), including either Soderberg or Traupel loss models. This model formulation allows the use of the gradient/Hessian information of both constraints and objective function, speeding-up the optimization process. Moreover, it allows using “Spatial Branch-and-Bound” optimization...

... of axial-flow compressors, is heavily dependent on the accuracy and robustness of empirical prediction models, mainly the deviation models and loss models. A large number of such models have been developed, however, a comprehensive evaluation of their prediction capabilities was lacked yet. To carry out...

... at part load, typically realized by a partial admission control, which is challenging to predict numerically. Full annulus computation can only be avoided applying empirical partial admission loss models to conventional full-admission computations. This article aims at assessing the reliability...

... are compared with the experimental data to verify the method presented in this paper. A discussion of the result then follows. Keywords: meanline; incidence angle; loss model; transonic compressor NOMENCLATURE Abbreviations 0D zero dimensional 1D one dimensional 3D three dimensional CDA controlled diffusion...

... 10 03 2009 The various incidence, deviation and loss models used in through-flow analysis methods, such as Streamline Curvature, are nothing more than statistical curve fits. A closer look at public domain data reveals that these statistical correlations and curve fits are usually...