Design and operation of nuclear reactor is very difficult issue from the engineering technical point view. All facilities must be availably designed separately, but with respect to other working in same system too. In power plant key safety factor insurance fuel assemblies cooling. The basic requirement this view an pressure loss coefficient assessment for all possible modes coolant flow. This ...

At Siemens the in-house CFD code UniFlow is used to analyse fluid flow and heat transfer in oilimmersed dry-type transformers, as well transformer components like windings, cores, tank walls, radiators. It can be employed perform steady state transient analyses. This paper describes its physical models numerical solution methods. Moreover, it presents an application a valve winding of HVDC tran...