X Engine Surge System Modeling And Simulation

The thesis is from Guizhou Aero-Engine Research Institute, member of China Aviation Industry Corporation I. Researchers in the institute remodeled WP13AII engine into WP13B engine, resulting in the changing of the operating point and thus the abnormity of anti-surging regulator. The author aims to probe into the relation among the parameters of the anti-surging regulator, of the engine and of the main fuel regulator, ravel the failure and show how to modify the anti-surging equipment by accomplishing the modeling and simulation of the process.Simulation research is implemented in the paper respectively to the anti-surging regulating equipments and to some components of main controller closely related to the anti-surging regulating process. The author adopts dynamic simulation of each element to solve the problem of intense changing of the sectional parameters. Two methods are used in the paper. One is element-method modeling based on the flow continuity equation and force balance equation. The other is simulating with AMESim, an advanced modeling and simulating software of hydraulic system. With the program the author also researched how the anti-surging regulating process is affected by the parameters of the main throttle, the vice throttle and the operating point of the pressure-increasing limiter.The conclusion is that the abnormity of the anti-surging regulating process is mainly due to the unstable burning of the firebox because of the intense changing of the regulating process. And the problem is resolved by means of modifying thediameter of the main throttle and the vice throttle.