Strijak

The goal of this work is verification of turbulence models and acoustic analogy for flow simulation and calculation of noise for a tandem of cylinders. In the scope of this work numerical results of flow simulation around a tandem of cylinders with different turbulent models were presented. Problem definition and computing methods were also defined. The RANS equations were closed with k-e, k-ω SST, SA turbulence model. Large eddy simulation was based on one sub-grid turbulence model equation. Curle’s acoustic analogy was also used. The computational method is based on the finite method algorithm. The calculation of aerodynamic coefficients of bodies was conducted with different grids and turbulence’s models. Comparison of the obtained results with the experimental results received also by the authors was carried out. On the basis of the obtained results recommendations on calculations of 3D cases could be given.

The purpose of the study is to select an optimum componentry for the device "Scanliner". The authors present results of numerical calculations of streamlining of the probe with different componentry in a swirling gas flow. The problem and solution method are described. Reynolds equations are closed by Menter turbulence model. The basis of the calculation method is a method of control volume. The authors provide a calculation of ADF of different componentry of the bodies at changing the angle of the attack and angular velocity of the spin flow. The authors compare experimental results obtained in the installation 'screw-ring'. Basing on these results, a recommendation can be given re optimal componentry for the device which has a form of a blunt cylinder with two disks.