This paper reviews the design of a combination variable I fixed-step port unloader system for moderate capacity refrigeration screw compressors. The general specification of an unloader system to meet application requirements and specific issues of port and flowpath design are discussed. The paper demonstrates use of a comprehensive compressor simulation and a commercial pipe flow analysis prog...

An overview of the successful application modern composite materials for manufacturing turbine blades aircraft gas engines, axial mine and blast furnace compressors. Their main advantages these in comparison with metal are analyzed. Analytical calculations stresses arising material plastic starting turboexpanders carried out. The possibility glass-filled polyamide moving guide their operation a...

An unsteady two-dimensional numerical investigation was performed on the viscous flow passing through a multi-blade cascade. A Cartesian finite-volume approach was employed and it was linked to Van-Leer's and Roe's flux splitting schemes to evaluate inviscid flux terms. To prevent the oscillatory behavior of numerical results and to increase the accuracy, Monotonic Upstream Scheme for Conservat...