X型发动机防喘系统建模与仿真

【作者】 任新宇；

【导师】 郭迎清；

【作者基本信息】 西北工业大学 ， 航空宇航推进理论与工程， 2003， 硕士

【摘要】 本课题来源于航空工业总公司第一集团贵航发动机研究所，该所在将WP13AⅡ发动机改型为WP13B发动机后由于工作点变化导致发动机防喘切油过程异常，本课题的研究目的就是通过对发动机防喘切油过程进行建模和仿真，来探讨防喘调节器各结构尺寸与发动机及调节器各参数之间的关系，以及WP13B发动机防喘切油故障的原因，并给出防喘装置改进设计的具体措施。 本文对防喘调节器及与防喘切油过程密切相关的主调节器部分部件进行了仿真。由于切油过程各截面参数变化比较剧烈，因此需对各部件进行动态仿真。仿真采用的主要方法是以流量连续方程和力平衡方程为基础采用部件法建模，并应用高级液压系统建模仿真软件AMESim进行了仿真验证。然后利用仿真程序对主、副油路节流嘴尺寸及升压限制器投入工作点等结构参数对防喘切油过程的影响进行了研究。 研究表明：发动机防喘切油过程异常的主要原因是切油过程油压变化过于剧烈导致发动机燃烧室燃烧不稳定，适当修正防喘调节器主、副油路节流嘴直径可以使这一现象得到改善。更多还原

【Abstract】 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.更多还原