Affiliation of Author(s):能源与动力学院
Journal:JOURNAL OF AEROSPACE ENGINEERING
Key Words:Splitter plate Turbine-based combined-cycle Fluid-structure interaction Inlet unstart
Abstract:A splitter plate is a key component of the inlet system in turbine-based combined-cycle engines, which divides the whole captured air flow into different engines, namely turbojet and ramjet. The aerodynamic force acting on the thin splitter plate with a single pivot may engender vibration and, in turn, flow-field variations at the start and end of the mode transition phase. A loosely-coupled method was used to simulate the process of fluid-structure interaction. The results showed that the deformation of the splitter plate is, in fact, a process in which the elastic restoring force struggles against the aerodynamic force under the action of damping. At turbojet mode, the splitter plate can attain the maximum displacement of 7.20 mm. The terminal shock was observed to move back and forth in the flowpath. The mass flow rate in turbojet and ramjet flowpaths varied by 5.91 and 44.34%, respectively. At ramjet mode, the inlet fell into the unstart state with a greater displacement of 8.95 mm. The mass flow rate in turbojet and ramjet flowpaths, and slot-coupled cavity varied by 1.69, 23.91, and 51.85%, respectively. (C) 2017 American Society of Civil Engineers.
ISSN No.:0893-1321
Translation or Not:no
Date of Publication:2017-07-01
Co-author:秦启豪,郭帅
Correspondence Author:Xu Jinglei