Solution of inverse problems of gas dynamics of flat compressor cascades based on numerical simulation of turbulent flows
Journal Title: Технічна механіка, Техническая механика, Technical Mechanics - Year 2015, Vol 1, Issue 1
Abstract
This paper presents a technique for solving inverse problems in gas dynamics of flat compressor cascades, based on a numerical simulation of turbulent flows. This technique is based on the application of quasi-solutions searching method to the solution of inverse problems. In this case the solution of the inverse problem is reduced to solving the problem of finding the global extreme of some target function. A parametric description of the shape of cascade profiles is made using an original method, based on the Bezier curves and the system of Hicks – Henne smooth convex functions. The application of this method makes it possible to vary the geometric parameters of the cascade in wide ranges by means of a relatively small number of variable parameters and the preservation of the physically feasible profile path. The calculation of the target function is performed by simulating the flow from the numerical integration of the averaged Navier–Stokes equations which are closed by means of the Spalart–Allmaras one-parameter turbulence model. A hybrid genetic algorithm is used to find the extreme of the target function. The technique proposed allows the determination of the geometrical parameters of the cascade for a given pressure distribution on the contour of the desired profile as well as from given integral aerodynamic characteristics of the cascade. It can also be used to solve problems of aerodynamic optimization of compressor cascades. In addition, this technique can be easily adapted to the solution of similar problems in the three-dimensional formulation.
Authors and Affiliations
S. Melashich
Keywords
Related Articles
- EP ID EP355105
- DOI -
- Views 86
- Downloads 0
Mathematical modelling low-frequency dynamics of flow controller at various amplitudes of harmonic disturbance
A primary problem of mathematical modelling the low-frequency dynamic processes into a flow controller of a liquid rocket engine (LRE) is the construction of its linear mathematical model. This model forms a part of the...
Numerical simulation of missile payload operation
This paper considers the features of numerical simulation of the predicted destruction of the fastening elements of a special rocket structure under a given gas-dynamic impulse load. The structure under consideration is...
Artificial mini-magnetosphere as a means of controlling spacecraft motion in the Earth ionosphere
Based on the results of a series of experimental studies of the interaction of spacecraft models with a hypersonic rarefied plasma flow, this paper demonstrates the possibility of controlling spacecraft motion in the ion...
On the determination of the tether length for an experimental elec-trodynamic system
The aim of this paper is to analyze the dependence of the tether length of a small experimental electrody-namic space tether system (EDSTS) without additional contactors required for the EDSTS operation in the anode-cath...
Explosion of launch vehicle during the flight: environmental aspects of aftereffects and their evaluation
Environmental aspects of the aftereffects of a launch vehicle explosion during the flight are examined. A methodic approach to predictable evaluations involving the characteristics of the dropping cloud in an explosion,...