Advances in Numerical Methods for Fluid Networks in Secondary Air Systems of Gas Turbines
Aiming at the numerical simulation technology of the fluid network in the secondary air system of gas turbines,the research progress in numerical calculation methods and processes,flow characteristics and heat transfer mechanisms of typical flow resistance components,and other aspects are reviewed.The common research methods and results for analyzing the characteristics of important flow resistance compo-nents in the secondary air system,such as labyrinth seals,rim seals,and rotating disk cavities,are em-phatically summarized.On this basis,the development needs and directions of fluid network numerical simulation technology for secondary air systems are proposed,mainly including improving the steady-state calculation methods for secondary air systems,reducing the sensitivity of initial values of the algorithm and improving the convergence speed,carrying out the multi-physical field coupling numerical simulation study and characteristic analysis of flow resistance elements,improving the calculation accuracy of one-di-mensional flow models for elements,and optimizing individual flow resistance elements and their interac-tions in the entire system,thereby improving the overall design level of the secondary air system.
secondary air systemfluid network methodnumerical simulationflow resistanceheat exchangeflow parameters