Time-Marching Throughflow Analysis of Centrifugal Compressors with Boundary Conditions Based on Newton’s Method
Source abstract
Abstract
The meridional distribution of the flow parameters inside the centrifugal compressor is of great importance to its overall performance, as well as its matching performance under a thermal cycle. A time-marching throughflow method for the off-design performance analysis of the centrifugal compressor is described. The method is based on the strictly conservative throughflow-governing equations, and an improved method of boundary-condition enforcement is developed based on Newton’s method to achieve a robust and fast throughflow simulation. An inviscid blade force model was adopted to obtain the flow deflection inside the blade passage. Empirical loss models were integrated into the throughflow model to simulate the viscous force effects in the real three-dimensional flow. Two test cases are presented to validate the throughflow method by comparisons with the experimental data or CFD results, including the NASA low-speed centrifugal compressor (LSCC) and the Allison high-performance centrifugal compressor (HPCC). The simulation indicated that the developed enforcement method for the inlet and outlet boundary conditions significantly improves the computational robustness. For both the LSCC and HPCC cases, reasonable flow-parameter distribution was obtained and accurate overall characteristics were also predicted under the off-design conditions. The results indicated that the developed time-marching throughflow method is effective and efficient for the performance analysis of centrifugal compressors.
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Research context
OpenAlex topics: Turbomachinery Performance and Optimization · Fluid Dynamics and Turbulent Flows · Computational Fluid Dynamics and Aerodynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Advanced Gas Turbine Laboratory, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
Key Laboratory Academy for Light-Duty Gas Turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
Innovation Academy for Light-Duty Gas Turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
School of Power and Energy, Northwestern Polytechnical University, Xi’an 710129, China
School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Funding
National Science and Technology Major Project · National Natural Science Foundation of China
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