The unsteady aerodynamic parameters of 3D blade cascades oscillating in incompressible flow are determined with account for blade geometry and the influence of the steady hydrodynamic loads acting on the blades. On the assumption of separationless flow and harmonic blade oscillations, the corresponding boundary-value problem for the amplitude function of the unsteady velocity potential component is solved in the linear formulation, using a finite-element method. Test calculation results are presented and an example of calculating the unsteady aerodynamic parameters of a hydro-turbine model is given.Here, Φ is the perturbed-flow velocity potential. We introduce the cylindrical coordinates (r 1 , θ , x) fitted to the rotating cascade. In this coordinate system, the relative fluid velocity W is 0015-4628/05/4001-0034 

The paper presents the exothermic reaction monitoring method used in solving the thermal conductivity problems as well as in the process of solidifying the concrete foundation. The finite element method was applied. The problem was solved in a three-dimensional model taking into consideration the thermal characteristics dependence during the process of concrete hardening. The unsteady temperature field of the foundation block was calculated taking into account the forced pipe cooling. The given methodology is implemented in software and used for performing the three-dimensional unsteady temperature calculations. The software “Temper–3D” having a compliance certificate was developed according to the mentioned methodology. The program was registered in the Computer Software Register.