Fluid Network Analysis and Digital Calculation Method for Local Internal Cold Air System
The structure,air path flow and operation conditions of the cold air system in the gas turbine are extremely complex,which makes it very difficult for fluid calculation of the cold air system in the gas turbine.The calculation accuracy of the traditional one-dimensional fluid network method can no longer meet the needs of contemporary engine analysis and design.It is urgent to develop a high precision and fast system level fluid calculation method for the cold air system in the gas turbine.Aiming at the unloading chamber of the cold air system in the high-pressure rotor of a Marine gas turbine,the one-dimensional and three-dimensional co-simulation method is innovatively adopted in this paper to quickly solve the node information of the fluid network and analyze the heat transfer details of the flow in key areas.The results show that compared with the traditional one-dimensional fluid network method,the one-dimensional-three-dimensional coupling calculation can improve the overall calculation accuracy through boundary data transfer and coupling calculation,and compared with the traditional CFD calculation method,the one-dimensional-three-dimensional coupling calculation can accelerate the convergence rate of the calculation.Taking the unloading chamber of high pressure turbine chamber as an example,the one-dimensional and three-dimensional co-simulation calculation method can save about 83％of the convergence time,and the three-dimensional fluid calculation domain can obtain the details of the flow field in the key region,which is of great significance for mastering the flow characteristics of the key region under the system level calculation.
Gas TurbineInternal Cold Air SystemUnloading ChamberFluid NetworkJoint Simulation
万方数据
维普
