![]() ![]() The computational domain is a rectangular. Calculations are performed in the 2D cartesian formulation, QGDS is normalized as it is described at the end of Sect.2. QGDS for dense gases and liquids is now used as a governing model for numerical simulation of gas flows in the horizontal fast contact chemical reactor. Trapeznikova, in Parallel Computational Fluid Dynamics 2001, 2002 4.2 Simulation of gas flows in chemical reactors This is due to the design of the fluid passage to avoid any non-uniform pressure distribution around the expander wheel.ī.N. Even though the turboexpander discharge contains 25% condensates, the gas loading on the magnetic bearing is negligible. The Congo turboexpander mentioned in Table 3-10 is equipped with active magnetic bearings with a pressurized bearing housing vented to the compressor inlet. The radial loads on expander and compressor wheels are transferred to the bearings. Non-uniform pressure fields create non-uniform density and, therefore, the wheels’ reaction to resistance produces non-uniform radial load. Computational fluid dynamics is employed to estimate gas dynamic radial loads that, for the most part, are due to non-uniform pressure fields around the expander and compressor wheels. Evaluating gas dynamic radial loads, however, is a challenging task. Rotor dynamic analysis is performed based on conventional design parameters such as rotor weight, bearing span, and bearing stiffness. On the other hand, the design of radial magnetic bearings is based on both rotor dynamic and gas dynamic criteria. Gas dynamic radial loads are not considered in oil bearing rotor systems because the load capacity of oil bearings is quite high. Bloch, Claire Soares, in Turboexpanders and Process Applications, 2001 SIDE LOAD ISSUES
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