Open AccessSimulation Study on Flow-induced Vibration Characteristics of Multi-nozzle Ejector
Author(s) -
Yong Yang,
Zongzheng Liu,
Xiaojun Yan,
Jia Hequan
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/825/1/012012
Subject(s) - injector , nozzle , mechanics , vibration , mach number , coupling (piping) , computer simulation , flow (mathematics) , approximation error , physics , acoustics , engineering , mechanical engineering , computer science , thermodynamics , algorithm
The ejector is an important power source for intermittent wind tunnel. In order to accurately predict the flow-induced vibration (FIV) response, numerical simulation based on fluid-structure coupling method was carried out. Firstly, three-dimensional unsteady constant simulation on the flow field of ejector was done, using the renormalized k-ε model. The ejector inlet and outlet mass flow were basically consistent with design, and the relative error of Mach number in the third-stage nozzle was 1.79%. Secondly, in the one-way coupling simulation, the MPCCI software was performed. Thirdly, the calculated vibration spectrum was obtained. The simulation results could be found in good agreement with experiment, and the domain frequency relative error was 4.27%.