某大型国产客机发动机空中测试平台引气模拟系统设计

Design of Simulated Engine Bleed Air on Flight Test Bed for Large Domestic Civil Aircraft

发动机空中测试平台中的引气模拟系统是国产大型客机进行适航验证的关键试验系统,由于在实际中无法建立完整的用气系统实物模型,如何准确复现真实引气工况中关键参数的动态变化过程,已成为国产大型客机引气模拟系统设计中的瓶颈。利用孔板限流方法,开发引气系统控制器,设计和研制一套发动机空中测试平台引气模拟系统;利用地面台架试验进行引气模拟系统验证,并与真实飞机数据进行对比。结果表明:测试发动机的引气模拟系统具有和某大型客机引气系统相同的引气特性,满足大型客机发动机CCAR33部取证的引气模拟需求,实现了对发动机引气温度、压力和流量进行调节和监控。

The simulated engine bleed air system is the critical test system for large domestic civil aircraft engine airworthiness testing.Since it is difficult to establish entire physical air consumers,how to recurrent the bleed air system dynamic characteristics for critical parameters becomes the bottleneck of the development of large domestic civil aircraft simulated engine bleed air system.Based on the pore plate current-limiting method,a simulated engine bleed air system is designed and developed,verified by the ground bench test experiment,and compared with real aircraft data.The results show that the simulated engine bleed air system has good consistency with the technical condition of the prototype aircraft,can meet the bleed simulation requirements of CCAR33,and realize the regulation and monitoring function for bleed air temperature,pressure and flow rate.