Development of an automatic design and analysis tool for axial compressors

Download
2017
Kündeş, Necmettin Anıl
In this thesis, an automatic design and analysis tool is developed for the design of an axial flow compressor and to check the required design conditions of the designed compressor by using three dimensional CFD analyses automatically. The developed tool mainly consists of six parts which are mean line design, calculations based on radial equilibrium theory, parametrization, generation of three dimensional blade geometry, mesh generation and solver. A new design study for an axial flow compressor begins with mean line design part in the developed tool. Mean line design part comprises of one dimensional analyses and all the calculations are carried out on mean lines of the blades. Blade and flow properties along the blade span are calculated by using the result of mean line design code and the developed code which is based on radial equilibrium theory. Two dimensional blade cross sections are generated by parametrization part of the developed tool. These cross sections are defined with nurbs which are obtained by using blade angles, blade chord lengths and blade thickness distributions. Three dimensional blade cross sections are obtained by mapping of these two dimensional blade cross sections on the corresponding stream surfaces. Three dimensional blade geometry is generated by stacking up these three dimensional blade cross sections. Mesh is generated automatically around the three dimensional blade geometry by developed multiblock structured mesh generator. Three dimensional CFD analyses are performed by using in-house developed solver to obtain complete performance map of new designed compressor after the automatic mesh generation and this map is used to assess the success of the design. 

Suggestions

DEVELOPMENT OF AN AUTOMATIC DESIGN AND ANALYSIS TOOL FOR AXIAL FLOW COMPRESSORS
Kundes, Necmettin Anil; Aksel, Mehmet Haluk; Baran, Özgür Uğraş (2019-01-01)
This paper presents a new design and analysis tool that is developed to be employed during the design process of axial flow compressors. The tool chain implemented by this design tool consists of five parts: a mean-line design tool, followed by a blade geometry parametrization tool. Then 3D blade geometry is created, next a high quality structured mesh is generated and completed by Computational Fluid Dynamics (CFD) solution. All components employed in the new tool are either new developments, or achieved b...
Design, construction and performance evaluation of axial flow fans
Keklikoğlu, Hayrettin Özgür; Albayrak, Kahraman; Department of Mechanical Engineering (2019)
The primary purposes of this study are to examine the methods used in axial flow fan design, to perform these methods on the design of an axial fan, to develop a design application in order to reduce the design errors and spent time in the design process, and to determine the reliability of the application with numerical and experimental methods. This study is concerned with the design of axial flow fans. It provides detailed information about the design process — additionally, a design code is implemented....
Assessment and improvement of elementary force computations for cold forward rod extrusion
Ocal, M; Egemen, N; Tekkaya, AE (2005-06-01)
Two commonly used analytical force computation methods for cold forward rod extrusion are evaluated by means of precise finite element computations. The upperbound model by Avitzur based on the spherical velocity field and the model by Siebel based on a quasi-upper-bound solution are considered. It has been found that the pure deformation forces obtained by summing the ideal force and shear force terms deviate between +25% and -20% from the finite element solutions. Larger deviations, however, occur for the...
Experimental investigation of effects of cutting parameters on surface roughness in the WEDM process
Gökler, Mustafa İlhan (2000-10-01)
The experimental study presented in this paper aims to select the most suitable cutting and offset parameter combination for the wire electrical discharge machining process in order to get the desired surface roughness value for the machined workpieces. A series of experiments have been performed on 1040 steel material of thicknesses 30, 60 and 80 mm, and on 2379 and 2738 steel materials of thicknesses 30 and 60 mm. The test specimens have been cut by using different cutting and offset parameter combination...
Well-Conditioned 2D Models of Rod Arrays for Accelerating 3D Simulations of Photonic Crystals and Plasmonic Structures
Hatipoglu, Murat Enes; Sever, Emrah ; Dikmen,Fatih ; Eris, Ozgur; Ergül, Özgür Salih (2021-01-01)
Rod arrays consisting of finite-length cylinders are commonly used in the design of high-frequency resonance scattering assemblies, such as plasmonic, photonic-crystal, and near-zero-index structures. During the optimization of these three-dimensional structures by means of genetic algorithms, analyses with three-dimensional solvers, such as the multilevel fast multipole algorithm, create a time bottleneck On the other hand, simulation results in many applications show features that are independent of longi...
Citation Formats
N. A. Kündeş, “Development of an automatic design and analysis tool for axial compressors,” M.S. - Master of Science, Middle East Technical University, 2017.