Fluid-Structure Interaction Study of the Splitter Plate in Turbine-Based Combined-Cycle Inlet System
Publication: Journal of Aerospace Engineering
Volume 30, Issue 4
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.
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Acknowledgments
We would like to acknowledge the continued support of Natural Science Fund of China (NSFC) under the award number of 50876042 and 90916023.
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©2017 American Society of Civil Engineers.
History
Received: Jun 15, 2016
Accepted: Oct 13, 2016
Published online: Feb 2, 2017
Published in print: Jul 1, 2017
Discussion open until: Jul 2, 2017
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