CFD Analysis of Impeller-Diffuser Interaction in a Centrifugal Compressor with Twisted Vaned Diffuser

Rao, P. Vivekananda; Murty, G. V. Ramana; Rao, G. Venkata

doi:10.1007/978-81-322-2743-4_86

Cited by 1 publication

(1 citation statement)

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“…Vogel et al 23 carried out unsteady numerical simulation of centrifugal compressor, and found that the inlet pressure fluctuation is as high as 34.4%. Rao et al 24 found that TVD with radius ratio of 1.10 and impeller diffuser is the optimal configuration under the condition of blade tip Mach number of 0.35. Jun 25 carried out numerical simulation on the impeller, and found that rounding the inlet edge of the blade can effectively reduce the stress concentration of the impeller, and the weight of the forepart of the shroud can affect the stress distribution of the impeller.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the flow characteristics of centrifugal compressor impeller with crack damage

Liang

Xiang

Wei

et al. 2021

Advances in Mechanical Engineering

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The distribution and characteristics of internal flow field of the impeller with crack damage in service environment was investigated via numerical simulation with RNG k-ε turbulence model. The diffuser and volute are added based on the original impeller to simulate the internal flow field comprehensively. It was found that along the flow direction, the pressure, velocity, and temperature of the fluid increase continuously, and the maximum value appears near the outlet of the impeller. The maximum pressure and velocity in the crack area are distributed around the middle section and the trailing edge of the crack. Entropy production theory was applied in the study of internal flow, which reveals that the entropy production becomes larger around the crack. The further propagation of the crack is promoted by the opening force perpendicular to the entrance direction of the middle crack, the corrosion propagation at the rear edge of the crack, and the thermal deformation of the blade. The accelerated crack process will finally lead to the blade fracture accident.

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Section: Introductionmentioning

confidence: 99%