Registration Number
0207U006144,
0106U008601
, R & D reports
Title
Numerical modelling of aeroelastic characteristics, and increasing the reliability of blading in turbomachines at TPPs and cogeneration plants.
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Head
Gnesin V.I., Доктор технічних наук
Registration Date
22-03-2007
Organization
A.Podgorny Institute for Mechanical Engineering Problems of the National Academy of Sciences of Ukraine
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The scientific fundamentals of low-cost upgrading and improvement of flowing parts in turbomachines in a wide operation range by using different spatial profiling methods (scimitariness, twisting, etc.) are presented. A numerical method has been developed for analysing coupled aeroelastic vibrations of a blade row in a 3D viscous gas flow. The method is based on integrating Reynolds-averaged Navier-Stokes equations by using the modified Baldwin-Lomax turbulence algebraic model and the Godunov difference scheme. The basic regularities of the affect of different forms of spatial profiling on the structure of 3D flow have been established and constructions of stages with improved aerodynamic performance have been obtained. Numerical analysis of nonstationary characteristics of the turbomachine rotor in transient conditions allows using the nonlinear viscous model to predict occurrence of self-exciting vibrations (flutter) or auto-oscillation of blades.
Product Description
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2020-04-02
